* [PATCH 00/19] expose page table levels on Kconfig leve
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov
I've failed my attempt on split up mm_struct into separate header file to
be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
too much breakage and requires massive de-inlining of some architectures
(notably ARM and S390 with PGSTE).
This is other approach: expose number of page table levels on Kconfig
level and use it to get rid of nr_pmds in mm_struct.
Kirill A. Shutemov (19):
alpha: expose number of page table levels on Kconfig level
arm64: expose number of page table levels on Kconfig level
arm: expose number of page table levels on Kconfig level
frv: mark PUD and PMD folded
ia64: expose number of page table levels on Kconfig level
m32r: mark PMD folded
m68k: mark PMD folded and expose number of page table levels
mips: expose number of page table levels on Kconfig level
mn10300: mark PUD and PMD folded
parisc: expose number of page table levels on Kconfig level
powerpc: expose number of page table levels on Kconfig level
s390: expose number of page table levels
sh: expose number of page table levels
sparc: expose number of page table levels
tile: expose number of page table levels
um: expose number of page table levels
x86: expose number of page table levels on Kconfig level
mm: define default PGTABLE_LEVELS to two
mm: do not add nr_pmds into mm_struct if PMD is folded
arch/Kconfig | 4 ++++
arch/alpha/Kconfig | 4 ++++
arch/arm/Kconfig | 5 +++++
arch/arm64/Kconfig | 14 +++++++-------
arch/arm64/include/asm/kvm_mmu.h | 4 ++--
arch/arm64/include/asm/page.h | 4 ++--
arch/arm64/include/asm/pgalloc.h | 8 ++++----
arch/arm64/include/asm/pgtable-hwdef.h | 6 +++---
arch/arm64/include/asm/pgtable-types.h | 12 ++++++------
arch/arm64/include/asm/pgtable.h | 8 ++++----
arch/arm64/include/asm/tlb.h | 4 ++--
arch/arm64/mm/mmu.c | 4 ++--
arch/frv/include/asm/pgtable.h | 2 ++
arch/ia64/Kconfig | 18 +++++-------------
arch/ia64/include/asm/page.h | 4 ++--
arch/ia64/include/asm/pgalloc.h | 4 ++--
arch/ia64/include/asm/pgtable.h | 12 ++++++------
arch/ia64/kernel/ivt.S | 12 ++++++------
arch/ia64/kernel/machine_kexec.c | 4 ++--
arch/m32r/include/asm/pgtable-2level.h | 1 +
arch/m68k/Kconfig | 4 ++++
arch/m68k/include/asm/pgtable_mm.h | 2 ++
arch/mips/Kconfig | 5 +++++
arch/mn10300/include/asm/pgtable.h | 2 ++
arch/parisc/Kconfig | 5 +++++
arch/parisc/include/asm/pgalloc.h | 2 +-
arch/parisc/include/asm/pgtable.h | 17 ++++++++---------
arch/parisc/kernel/entry.S | 4 ++--
arch/parisc/kernel/head.S | 4 ++--
arch/parisc/mm/init.c | 2 +-
arch/powerpc/Kconfig | 6 ++++++
arch/s390/Kconfig | 5 +++++
arch/s390/include/asm/pgtable.h | 2 ++
arch/sh/Kconfig | 4 ++++
arch/sparc/Kconfig | 4 ++++
arch/tile/Kconfig | 5 +++++
arch/um/Kconfig.um | 5 +++++
arch/x86/Kconfig | 6 ++++++
arch/x86/include/asm/paravirt.h | 8 ++++----
arch/x86/include/asm/paravirt_types.h | 8 ++++----
arch/x86/include/asm/pgalloc.h | 8 ++++----
arch/x86/include/asm/pgtable-2level_types.h | 1 -
arch/x86/include/asm/pgtable-3level_types.h | 2 --
arch/x86/include/asm/pgtable.h | 8 ++++----
arch/x86/include/asm/pgtable_64_types.h | 1 -
arch/x86/include/asm/pgtable_types.h | 4 ++--
arch/x86/kernel/paravirt.c | 6 +++---
arch/x86/mm/pgtable.c | 14 +++++++-------
arch/x86/xen/mmu.c | 14 +++++++-------
include/asm-generic/pgtable.h | 5 +++++
include/linux/mm_types.h | 2 ++
51 files changed, 182 insertions(+), 117 deletions(-)
--
2.1.4
^ permalink raw reply [flat|nested] 93+ messages in thread
* [PATCH 00/19] expose page table levels on Kconfig leve
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov
I've failed my attempt on split up mm_struct into separate header file to
be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
too much breakage and requires massive de-inlining of some architectures
(notably ARM and S390 with PGSTE).
This is other approach: expose number of page table levels on Kconfig
level and use it to get rid of nr_pmds in mm_struct.
Kirill A. Shutemov (19):
alpha: expose number of page table levels on Kconfig level
arm64: expose number of page table levels on Kconfig level
arm: expose number of page table levels on Kconfig level
frv: mark PUD and PMD folded
ia64: expose number of page table levels on Kconfig level
m32r: mark PMD folded
m68k: mark PMD folded and expose number of page table levels
mips: expose number of page table levels on Kconfig level
mn10300: mark PUD and PMD folded
parisc: expose number of page table levels on Kconfig level
powerpc: expose number of page table levels on Kconfig level
s390: expose number of page table levels
sh: expose number of page table levels
sparc: expose number of page table levels
tile: expose number of page table levels
um: expose number of page table levels
x86: expose number of page table levels on Kconfig level
mm: define default PGTABLE_LEVELS to two
mm: do not add nr_pmds into mm_struct if PMD is folded
arch/Kconfig | 4 ++++
arch/alpha/Kconfig | 4 ++++
arch/arm/Kconfig | 5 +++++
arch/arm64/Kconfig | 14 +++++++-------
arch/arm64/include/asm/kvm_mmu.h | 4 ++--
arch/arm64/include/asm/page.h | 4 ++--
arch/arm64/include/asm/pgalloc.h | 8 ++++----
arch/arm64/include/asm/pgtable-hwdef.h | 6 +++---
arch/arm64/include/asm/pgtable-types.h | 12 ++++++------
arch/arm64/include/asm/pgtable.h | 8 ++++----
arch/arm64/include/asm/tlb.h | 4 ++--
arch/arm64/mm/mmu.c | 4 ++--
arch/frv/include/asm/pgtable.h | 2 ++
arch/ia64/Kconfig | 18 +++++-------------
arch/ia64/include/asm/page.h | 4 ++--
arch/ia64/include/asm/pgalloc.h | 4 ++--
arch/ia64/include/asm/pgtable.h | 12 ++++++------
arch/ia64/kernel/ivt.S | 12 ++++++------
arch/ia64/kernel/machine_kexec.c | 4 ++--
arch/m32r/include/asm/pgtable-2level.h | 1 +
arch/m68k/Kconfig | 4 ++++
arch/m68k/include/asm/pgtable_mm.h | 2 ++
arch/mips/Kconfig | 5 +++++
arch/mn10300/include/asm/pgtable.h | 2 ++
arch/parisc/Kconfig | 5 +++++
arch/parisc/include/asm/pgalloc.h | 2 +-
arch/parisc/include/asm/pgtable.h | 17 ++++++++---------
arch/parisc/kernel/entry.S | 4 ++--
arch/parisc/kernel/head.S | 4 ++--
arch/parisc/mm/init.c | 2 +-
arch/powerpc/Kconfig | 6 ++++++
arch/s390/Kconfig | 5 +++++
arch/s390/include/asm/pgtable.h | 2 ++
arch/sh/Kconfig | 4 ++++
arch/sparc/Kconfig | 4 ++++
arch/tile/Kconfig | 5 +++++
arch/um/Kconfig.um | 5 +++++
arch/x86/Kconfig | 6 ++++++
arch/x86/include/asm/paravirt.h | 8 ++++----
arch/x86/include/asm/paravirt_types.h | 8 ++++----
arch/x86/include/asm/pgalloc.h | 8 ++++----
arch/x86/include/asm/pgtable-2level_types.h | 1 -
arch/x86/include/asm/pgtable-3level_types.h | 2 --
arch/x86/include/asm/pgtable.h | 8 ++++----
arch/x86/include/asm/pgtable_64_types.h | 1 -
arch/x86/include/asm/pgtable_types.h | 4 ++--
arch/x86/kernel/paravirt.c | 6 +++---
arch/x86/mm/pgtable.c | 14 +++++++-------
arch/x86/xen/mmu.c | 14 +++++++-------
include/asm-generic/pgtable.h | 5 +++++
include/linux/mm_types.h | 2 ++
51 files changed, 182 insertions(+), 117 deletions(-)
--
2.1.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
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^ permalink raw reply [flat|nested] 93+ messages in thread
* [PATCH 01/19] alpha: expose number of page table levels on Kconfig level
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Richard Henderson, Ivan Kokshaysky, Matt Turner
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
---
arch/alpha/Kconfig | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index b7ff9a318c31..bf9e9d3b3792 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -76,6 +76,10 @@ config GENERIC_ISA_DMA
bool
default y
+config PGTABLE_LEVELS
+ int
+ default 3
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 01/19] alpha: expose number of page table levels on Kconfig level
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Richard Henderson, Ivan Kokshaysky, Matt Turner
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
---
arch/alpha/Kconfig | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index b7ff9a318c31..bf9e9d3b3792 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -76,6 +76,10 @@ config GENERIC_ISA_DMA
bool
default y
+config PGTABLE_LEVELS
+ int
+ default 3
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 02/19] arm64: expose number of page table levels on Kconfig level
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Catalin Marinas, Will Deacon
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
ARM64_PGTABLE_LEVELS is renamed to PGTABLE_LEVELS and defined before
sourcing init/Kconfig: arch/Kconfig will define default value and it's
sourced from init/Kconfig.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
---
arch/arm64/Kconfig | 14 +++++++-------
arch/arm64/include/asm/kvm_mmu.h | 4 ++--
arch/arm64/include/asm/page.h | 4 ++--
arch/arm64/include/asm/pgalloc.h | 8 ++++----
arch/arm64/include/asm/pgtable-hwdef.h | 6 +++---
arch/arm64/include/asm/pgtable-types.h | 12 ++++++------
arch/arm64/include/asm/pgtable.h | 8 ++++----
arch/arm64/include/asm/tlb.h | 4 ++--
arch/arm64/mm/mmu.c | 4 ++--
9 files changed, 32 insertions(+), 32 deletions(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 1b8e97331ffb..3f2fba996bc2 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -143,6 +143,13 @@ config KERNEL_MODE_NEON
config FIX_EARLYCON_MEM
def_bool y
+config PGTABLE_LEVELS
+ int
+ default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
+ default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
+ default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
+ default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
@@ -413,13 +420,6 @@ config ARM64_VA_BITS
default 42 if ARM64_VA_BITS_42
default 48 if ARM64_VA_BITS_48
-config ARM64_PGTABLE_LEVELS
- int
- default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
- default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
- default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
- default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
-
config CPU_BIG_ENDIAN
bool "Build big-endian kernel"
help
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index 66577581ce68..e135a312182f 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -161,12 +161,12 @@ static inline bool kvm_s2pmd_readonly(pmd_t *pmd)
/*
* If we are concatenating first level stage-2 page tables, we would have less
* than or equal to 16 pointers in the fake PGD, because that's what the
- * architecture allows. In this case, (4 - CONFIG_ARM64_PGTABLE_LEVELS)
+ * architecture allows. In this case, (4 - CONFIG_PGTABLE_LEVELS)
* represents the first level for the host, and we add 1 to go to the next
* level (which uses contatenation) for the stage-2 tables.
*/
#if PTRS_PER_S2_PGD <= 16
-#define KVM_PREALLOC_LEVEL (4 - CONFIG_ARM64_PGTABLE_LEVELS + 1)
+#define KVM_PREALLOC_LEVEL (4 - CONFIG_PGTABLE_LEVELS + 1)
#else
#define KVM_PREALLOC_LEVEL (0)
#endif
diff --git a/arch/arm64/include/asm/page.h b/arch/arm64/include/asm/page.h
index 22b16232bd60..8fc8fa280e92 100644
--- a/arch/arm64/include/asm/page.h
+++ b/arch/arm64/include/asm/page.h
@@ -36,9 +36,9 @@
* for more information).
*/
#ifdef CONFIG_ARM64_64K_PAGES
-#define SWAPPER_PGTABLE_LEVELS (CONFIG_ARM64_PGTABLE_LEVELS)
+#define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS)
#else
-#define SWAPPER_PGTABLE_LEVELS (CONFIG_ARM64_PGTABLE_LEVELS - 1)
+#define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS - 1)
#endif
#define SWAPPER_DIR_SIZE (SWAPPER_PGTABLE_LEVELS * PAGE_SIZE)
diff --git a/arch/arm64/include/asm/pgalloc.h b/arch/arm64/include/asm/pgalloc.h
index e20df38a8ff3..76420568d66a 100644
--- a/arch/arm64/include/asm/pgalloc.h
+++ b/arch/arm64/include/asm/pgalloc.h
@@ -28,7 +28,7 @@
#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO)
-#if CONFIG_ARM64_PGTABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
@@ -46,9 +46,9 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
set_pud(pud, __pud(__pa(pmd) | PMD_TYPE_TABLE));
}
-#endif /* CONFIG_ARM64_PGTABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
-#if CONFIG_ARM64_PGTABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
{
@@ -66,7 +66,7 @@ static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
set_pgd(pgd, __pgd(__pa(pud) | PUD_TYPE_TABLE));
}
-#endif /* CONFIG_ARM64_PGTABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
extern pgd_t *pgd_alloc(struct mm_struct *mm);
extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
index 5f930cc9ea83..80f3d241cff8 100644
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h
@@ -21,7 +21,7 @@
/*
* PMD_SHIFT determines the size a level 2 page table entry can map.
*/
-#if CONFIG_ARM64_PGTABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
#define PMD_SHIFT ((PAGE_SHIFT - 3) * 2 + 3)
#define PMD_SIZE (_AC(1, UL) << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE-1))
@@ -31,7 +31,7 @@
/*
* PUD_SHIFT determines the size a level 1 page table entry can map.
*/
-#if CONFIG_ARM64_PGTABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
#define PUD_SHIFT ((PAGE_SHIFT - 3) * 3 + 3)
#define PUD_SIZE (_AC(1, UL) << PUD_SHIFT)
#define PUD_MASK (~(PUD_SIZE-1))
@@ -42,7 +42,7 @@
* PGDIR_SHIFT determines the size a top-level page table entry can map
* (depending on the configuration, this level can be 0, 1 or 2).
*/
-#define PGDIR_SHIFT ((PAGE_SHIFT - 3) * CONFIG_ARM64_PGTABLE_LEVELS + 3)
+#define PGDIR_SHIFT ((PAGE_SHIFT - 3) * CONFIG_PGTABLE_LEVELS + 3)
#define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
#define PTRS_PER_PGD (1 << (VA_BITS - PGDIR_SHIFT))
diff --git a/arch/arm64/include/asm/pgtable-types.h b/arch/arm64/include/asm/pgtable-types.h
index ca9df80af896..2b1bd7e52c3b 100644
--- a/arch/arm64/include/asm/pgtable-types.h
+++ b/arch/arm64/include/asm/pgtable-types.h
@@ -38,13 +38,13 @@ typedef struct { pteval_t pte; } pte_t;
#define pte_val(x) ((x).pte)
#define __pte(x) ((pte_t) { (x) } )
-#if CONFIG_ARM64_PGTABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
typedef struct { pmdval_t pmd; } pmd_t;
#define pmd_val(x) ((x).pmd)
#define __pmd(x) ((pmd_t) { (x) } )
#endif
-#if CONFIG_ARM64_PGTABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
typedef struct { pudval_t pud; } pud_t;
#define pud_val(x) ((x).pud)
#define __pud(x) ((pud_t) { (x) } )
@@ -64,13 +64,13 @@ typedef pteval_t pte_t;
#define pte_val(x) (x)
#define __pte(x) (x)
-#if CONFIG_ARM64_PGTABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
typedef pmdval_t pmd_t;
#define pmd_val(x) (x)
#define __pmd(x) (x)
#endif
-#if CONFIG_ARM64_PGTABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
typedef pudval_t pud_t;
#define pud_val(x) (x)
#define __pud(x) (x)
@@ -86,9 +86,9 @@ typedef pteval_t pgprot_t;
#endif /* STRICT_MM_TYPECHECKS */
-#if CONFIG_ARM64_PGTABLE_LEVELS == 2
+#if CONFIG_PGTABLE_LEVELS == 2
#include <asm-generic/pgtable-nopmd.h>
-#elif CONFIG_ARM64_PGTABLE_LEVELS == 3
+#elif CONFIG_PGTABLE_LEVELS == 3
#include <asm-generic/pgtable-nopud.h>
#endif
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index a26a5740afc4..9fb699405eb9 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -376,7 +376,7 @@ static inline pte_t *pmd_page_vaddr(pmd_t pmd)
*/
#define mk_pte(page,prot) pfn_pte(page_to_pfn(page),prot)
-#if CONFIG_ARM64_PGTABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
#define pmd_ERROR(pmd) __pmd_error(__FILE__, __LINE__, pmd_val(pmd))
@@ -411,9 +411,9 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr)
#define pud_page(pud) pfn_to_page(__phys_to_pfn(pud_val(pud) & PHYS_MASK))
-#endif /* CONFIG_ARM64_PGTABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
-#if CONFIG_ARM64_PGTABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
#define pud_ERROR(pud) __pud_error(__FILE__, __LINE__, pud_val(pud))
@@ -447,7 +447,7 @@ static inline pud_t *pud_offset(pgd_t *pgd, unsigned long addr)
#define pgd_page(pgd) pfn_to_page(__phys_to_pfn(pgd_val(pgd) & PHYS_MASK))
-#endif /* CONFIG_ARM64_PGTABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
#define pgd_ERROR(pgd) __pgd_error(__FILE__, __LINE__, pgd_val(pgd))
diff --git a/arch/arm64/include/asm/tlb.h b/arch/arm64/include/asm/tlb.h
index c028fe37456f..66399cf6b490 100644
--- a/arch/arm64/include/asm/tlb.h
+++ b/arch/arm64/include/asm/tlb.h
@@ -52,7 +52,7 @@ static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
tlb_remove_entry(tlb, pte);
}
-#if CONFIG_ARM64_PGTABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
unsigned long addr)
{
@@ -60,7 +60,7 @@ static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
}
#endif
-#if CONFIG_ARM64_PGTABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp,
unsigned long addr)
{
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index c6daaf6c6f97..79e01163a981 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -550,10 +550,10 @@ void vmemmap_free(unsigned long start, unsigned long end)
#endif /* CONFIG_SPARSEMEM_VMEMMAP */
static pte_t bm_pte[PTRS_PER_PTE] __page_aligned_bss;
-#if CONFIG_ARM64_PGTABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
static pmd_t bm_pmd[PTRS_PER_PMD] __page_aligned_bss;
#endif
-#if CONFIG_ARM64_PGTABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
static pud_t bm_pud[PTRS_PER_PUD] __page_aligned_bss;
#endif
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 02/19] arm64: expose number of page table levels on Kconfig level
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Catalin Marinas, Will Deacon
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
ARM64_PGTABLE_LEVELS is renamed to PGTABLE_LEVELS and defined before
sourcing init/Kconfig: arch/Kconfig will define default value and it's
sourced from init/Kconfig.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
---
arch/arm64/Kconfig | 14 +++++++-------
arch/arm64/include/asm/kvm_mmu.h | 4 ++--
arch/arm64/include/asm/page.h | 4 ++--
arch/arm64/include/asm/pgalloc.h | 8 ++++----
arch/arm64/include/asm/pgtable-hwdef.h | 6 +++---
arch/arm64/include/asm/pgtable-types.h | 12 ++++++------
arch/arm64/include/asm/pgtable.h | 8 ++++----
arch/arm64/include/asm/tlb.h | 4 ++--
arch/arm64/mm/mmu.c | 4 ++--
9 files changed, 32 insertions(+), 32 deletions(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 1b8e97331ffb..3f2fba996bc2 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -143,6 +143,13 @@ config KERNEL_MODE_NEON
config FIX_EARLYCON_MEM
def_bool y
+config PGTABLE_LEVELS
+ int
+ default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
+ default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
+ default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
+ default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
@@ -413,13 +420,6 @@ config ARM64_VA_BITS
default 42 if ARM64_VA_BITS_42
default 48 if ARM64_VA_BITS_48
-config ARM64_PGTABLE_LEVELS
- int
- default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
- default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
- default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
- default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
-
config CPU_BIG_ENDIAN
bool "Build big-endian kernel"
help
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index 66577581ce68..e135a312182f 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -161,12 +161,12 @@ static inline bool kvm_s2pmd_readonly(pmd_t *pmd)
/*
* If we are concatenating first level stage-2 page tables, we would have less
* than or equal to 16 pointers in the fake PGD, because that's what the
- * architecture allows. In this case, (4 - CONFIG_ARM64_PGTABLE_LEVELS)
+ * architecture allows. In this case, (4 - CONFIG_PGTABLE_LEVELS)
* represents the first level for the host, and we add 1 to go to the next
* level (which uses contatenation) for the stage-2 tables.
*/
#if PTRS_PER_S2_PGD <= 16
-#define KVM_PREALLOC_LEVEL (4 - CONFIG_ARM64_PGTABLE_LEVELS + 1)
+#define KVM_PREALLOC_LEVEL (4 - CONFIG_PGTABLE_LEVELS + 1)
#else
#define KVM_PREALLOC_LEVEL (0)
#endif
diff --git a/arch/arm64/include/asm/page.h b/arch/arm64/include/asm/page.h
index 22b16232bd60..8fc8fa280e92 100644
--- a/arch/arm64/include/asm/page.h
+++ b/arch/arm64/include/asm/page.h
@@ -36,9 +36,9 @@
* for more information).
*/
#ifdef CONFIG_ARM64_64K_PAGES
-#define SWAPPER_PGTABLE_LEVELS (CONFIG_ARM64_PGTABLE_LEVELS)
+#define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS)
#else
-#define SWAPPER_PGTABLE_LEVELS (CONFIG_ARM64_PGTABLE_LEVELS - 1)
+#define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS - 1)
#endif
#define SWAPPER_DIR_SIZE (SWAPPER_PGTABLE_LEVELS * PAGE_SIZE)
diff --git a/arch/arm64/include/asm/pgalloc.h b/arch/arm64/include/asm/pgalloc.h
index e20df38a8ff3..76420568d66a 100644
--- a/arch/arm64/include/asm/pgalloc.h
+++ b/arch/arm64/include/asm/pgalloc.h
@@ -28,7 +28,7 @@
#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO)
-#if CONFIG_ARM64_PGTABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
@@ -46,9 +46,9 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
set_pud(pud, __pud(__pa(pmd) | PMD_TYPE_TABLE));
}
-#endif /* CONFIG_ARM64_PGTABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
-#if CONFIG_ARM64_PGTABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
{
@@ -66,7 +66,7 @@ static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
set_pgd(pgd, __pgd(__pa(pud) | PUD_TYPE_TABLE));
}
-#endif /* CONFIG_ARM64_PGTABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
extern pgd_t *pgd_alloc(struct mm_struct *mm);
extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
index 5f930cc9ea83..80f3d241cff8 100644
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h
@@ -21,7 +21,7 @@
/*
* PMD_SHIFT determines the size a level 2 page table entry can map.
*/
-#if CONFIG_ARM64_PGTABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
#define PMD_SHIFT ((PAGE_SHIFT - 3) * 2 + 3)
#define PMD_SIZE (_AC(1, UL) << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE-1))
@@ -31,7 +31,7 @@
/*
* PUD_SHIFT determines the size a level 1 page table entry can map.
*/
-#if CONFIG_ARM64_PGTABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
#define PUD_SHIFT ((PAGE_SHIFT - 3) * 3 + 3)
#define PUD_SIZE (_AC(1, UL) << PUD_SHIFT)
#define PUD_MASK (~(PUD_SIZE-1))
@@ -42,7 +42,7 @@
* PGDIR_SHIFT determines the size a top-level page table entry can map
* (depending on the configuration, this level can be 0, 1 or 2).
*/
-#define PGDIR_SHIFT ((PAGE_SHIFT - 3) * CONFIG_ARM64_PGTABLE_LEVELS + 3)
+#define PGDIR_SHIFT ((PAGE_SHIFT - 3) * CONFIG_PGTABLE_LEVELS + 3)
#define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
#define PTRS_PER_PGD (1 << (VA_BITS - PGDIR_SHIFT))
diff --git a/arch/arm64/include/asm/pgtable-types.h b/arch/arm64/include/asm/pgtable-types.h
index ca9df80af896..2b1bd7e52c3b 100644
--- a/arch/arm64/include/asm/pgtable-types.h
+++ b/arch/arm64/include/asm/pgtable-types.h
@@ -38,13 +38,13 @@ typedef struct { pteval_t pte; } pte_t;
#define pte_val(x) ((x).pte)
#define __pte(x) ((pte_t) { (x) } )
-#if CONFIG_ARM64_PGTABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
typedef struct { pmdval_t pmd; } pmd_t;
#define pmd_val(x) ((x).pmd)
#define __pmd(x) ((pmd_t) { (x) } )
#endif
-#if CONFIG_ARM64_PGTABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
typedef struct { pudval_t pud; } pud_t;
#define pud_val(x) ((x).pud)
#define __pud(x) ((pud_t) { (x) } )
@@ -64,13 +64,13 @@ typedef pteval_t pte_t;
#define pte_val(x) (x)
#define __pte(x) (x)
-#if CONFIG_ARM64_PGTABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
typedef pmdval_t pmd_t;
#define pmd_val(x) (x)
#define __pmd(x) (x)
#endif
-#if CONFIG_ARM64_PGTABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
typedef pudval_t pud_t;
#define pud_val(x) (x)
#define __pud(x) (x)
@@ -86,9 +86,9 @@ typedef pteval_t pgprot_t;
#endif /* STRICT_MM_TYPECHECKS */
-#if CONFIG_ARM64_PGTABLE_LEVELS == 2
+#if CONFIG_PGTABLE_LEVELS == 2
#include <asm-generic/pgtable-nopmd.h>
-#elif CONFIG_ARM64_PGTABLE_LEVELS == 3
+#elif CONFIG_PGTABLE_LEVELS == 3
#include <asm-generic/pgtable-nopud.h>
#endif
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index a26a5740afc4..9fb699405eb9 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -376,7 +376,7 @@ static inline pte_t *pmd_page_vaddr(pmd_t pmd)
*/
#define mk_pte(page,prot) pfn_pte(page_to_pfn(page),prot)
-#if CONFIG_ARM64_PGTABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
#define pmd_ERROR(pmd) __pmd_error(__FILE__, __LINE__, pmd_val(pmd))
@@ -411,9 +411,9 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr)
#define pud_page(pud) pfn_to_page(__phys_to_pfn(pud_val(pud) & PHYS_MASK))
-#endif /* CONFIG_ARM64_PGTABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
-#if CONFIG_ARM64_PGTABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
#define pud_ERROR(pud) __pud_error(__FILE__, __LINE__, pud_val(pud))
@@ -447,7 +447,7 @@ static inline pud_t *pud_offset(pgd_t *pgd, unsigned long addr)
#define pgd_page(pgd) pfn_to_page(__phys_to_pfn(pgd_val(pgd) & PHYS_MASK))
-#endif /* CONFIG_ARM64_PGTABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
#define pgd_ERROR(pgd) __pgd_error(__FILE__, __LINE__, pgd_val(pgd))
diff --git a/arch/arm64/include/asm/tlb.h b/arch/arm64/include/asm/tlb.h
index c028fe37456f..66399cf6b490 100644
--- a/arch/arm64/include/asm/tlb.h
+++ b/arch/arm64/include/asm/tlb.h
@@ -52,7 +52,7 @@ static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
tlb_remove_entry(tlb, pte);
}
-#if CONFIG_ARM64_PGTABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
unsigned long addr)
{
@@ -60,7 +60,7 @@ static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
}
#endif
-#if CONFIG_ARM64_PGTABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp,
unsigned long addr)
{
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index c6daaf6c6f97..79e01163a981 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -550,10 +550,10 @@ void vmemmap_free(unsigned long start, unsigned long end)
#endif /* CONFIG_SPARSEMEM_VMEMMAP */
static pte_t bm_pte[PTRS_PER_PTE] __page_aligned_bss;
-#if CONFIG_ARM64_PGTABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
static pmd_t bm_pmd[PTRS_PER_PMD] __page_aligned_bss;
#endif
-#if CONFIG_ARM64_PGTABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
static pud_t bm_pud[PTRS_PER_PUD] __page_aligned_bss;
#endif
--
2.1.4
--
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 03/19] arm: expose number of page table levels on Kconfig level
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov, Russell King
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Russell King <linux@arm.linux.org.uk>
---
arch/arm/Kconfig | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 4211507e2bca..d7dca652573f 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -286,6 +286,11 @@ config GENERIC_BUG
def_bool y
depends on BUG
+config PGTABLE_LEVELS
+ int
+ default 3 if ARM_LPAE
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 03/19] arm: expose number of page table levels on Kconfig level
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov, Russell King
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Russell King <linux@arm.linux.org.uk>
---
arch/arm/Kconfig | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 4211507e2bca..d7dca652573f 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -286,6 +286,11 @@ config GENERIC_BUG
def_bool y
depends on BUG
+config PGTABLE_LEVELS
+ int
+ default 3 if ARM_LPAE
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
--
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the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 04/19] frv: mark PUD and PMD folded
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov, David Howells
Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: David Howells <dhowells@redhat.com>
---
arch/frv/include/asm/pgtable.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/frv/include/asm/pgtable.h b/arch/frv/include/asm/pgtable.h
index 93bcf2abd1a1..07d7a7ef8bd5 100644
--- a/arch/frv/include/asm/pgtable.h
+++ b/arch/frv/include/asm/pgtable.h
@@ -123,12 +123,14 @@ extern unsigned long empty_zero_page;
#define PGDIR_MASK (~(PGDIR_SIZE - 1))
#define PTRS_PER_PGD 64
+#define __PAGETABLE_PUD_FOLDED
#define PUD_SHIFT 26
#define PTRS_PER_PUD 1
#define PUD_SIZE (1UL << PUD_SHIFT)
#define PUD_MASK (~(PUD_SIZE - 1))
#define PUE_SIZE 256
+#define __PAGETABLE_PMD_FOLDED
#define PMD_SHIFT 26
#define PMD_SIZE (1UL << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE - 1))
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 04/19] frv: mark PUD and PMD folded
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov, David Howells
Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: David Howells <dhowells@redhat.com>
---
arch/frv/include/asm/pgtable.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/frv/include/asm/pgtable.h b/arch/frv/include/asm/pgtable.h
index 93bcf2abd1a1..07d7a7ef8bd5 100644
--- a/arch/frv/include/asm/pgtable.h
+++ b/arch/frv/include/asm/pgtable.h
@@ -123,12 +123,14 @@ extern unsigned long empty_zero_page;
#define PGDIR_MASK (~(PGDIR_SIZE - 1))
#define PTRS_PER_PGD 64
+#define __PAGETABLE_PUD_FOLDED
#define PUD_SHIFT 26
#define PTRS_PER_PUD 1
#define PUD_SIZE (1UL << PUD_SHIFT)
#define PUD_MASK (~(PUD_SIZE - 1))
#define PUE_SIZE 256
+#define __PAGETABLE_PMD_FOLDED
#define PMD_SHIFT 26
#define PMD_SIZE (1UL << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE - 1))
--
2.1.4
--
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 05/19] ia64: expose number of page table levels on Kconfig level
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Tony Luck, Fenghua Yu
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
We need to define PGTABLE_LEVELS before sourcing init/Kconfig:
arch/Kconfig will define default value and it's sourced from init/Kconfig.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
---
arch/ia64/Kconfig | 18 +++++-------------
arch/ia64/include/asm/page.h | 4 ++--
arch/ia64/include/asm/pgalloc.h | 4 ++--
arch/ia64/include/asm/pgtable.h | 12 ++++++------
arch/ia64/kernel/ivt.S | 12 ++++++------
arch/ia64/kernel/machine_kexec.c | 4 ++--
6 files changed, 23 insertions(+), 31 deletions(-)
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 074e52bf815c..56313dfd9685 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -1,3 +1,8 @@
+config PGTABLE_LEVELS
+ int "Page Table Levels" if !IA64_PAGE_SIZE_64KB
+ range 3 4 if !IA64_PAGE_SIZE_64KB
+ default 4
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
@@ -286,19 +291,6 @@ config IA64_PAGE_SIZE_64KB
endchoice
-choice
- prompt "Page Table Levels"
- default PGTABLE_3
-
-config PGTABLE_3
- bool "3 Levels"
-
-config PGTABLE_4
- depends on !IA64_PAGE_SIZE_64KB
- bool "4 Levels"
-
-endchoice
-
if IA64_HP_SIM
config HZ
default 32
diff --git a/arch/ia64/include/asm/page.h b/arch/ia64/include/asm/page.h
index 1f1bf144fe62..ec48bb9f95e1 100644
--- a/arch/ia64/include/asm/page.h
+++ b/arch/ia64/include/asm/page.h
@@ -173,7 +173,7 @@ get_order (unsigned long size)
*/
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pmd; } pmd_t;
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
typedef struct { unsigned long pud; } pud_t;
#endif
typedef struct { unsigned long pgd; } pgd_t;
@@ -182,7 +182,7 @@ get_order (unsigned long size)
# define pte_val(x) ((x).pte)
# define pmd_val(x) ((x).pmd)
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
# define pud_val(x) ((x).pud)
#endif
# define pgd_val(x) ((x).pgd)
diff --git a/arch/ia64/include/asm/pgalloc.h b/arch/ia64/include/asm/pgalloc.h
index 5767cdfc08db..f5e70e961948 100644
--- a/arch/ia64/include/asm/pgalloc.h
+++ b/arch/ia64/include/asm/pgalloc.h
@@ -32,7 +32,7 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
quicklist_free(0, NULL, pgd);
}
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
static inline void
pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
{
@@ -49,7 +49,7 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
quicklist_free(0, NULL, pud);
}
#define __pud_free_tlb(tlb, pud, address) pud_free((tlb)->mm, pud)
-#endif /* CONFIG_PGTABLE_4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
static inline void
pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h
index 7b6f8801df57..9f3ed9ee8f13 100644
--- a/arch/ia64/include/asm/pgtable.h
+++ b/arch/ia64/include/asm/pgtable.h
@@ -99,7 +99,7 @@
#define PMD_MASK (~(PMD_SIZE-1))
#define PTRS_PER_PMD (1UL << (PTRS_PER_PTD_SHIFT))
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
/*
* Definitions for second level:
*
@@ -117,7 +117,7 @@
*
* PGDIR_SHIFT determines what a first-level page table entry can map.
*/
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
#define PGDIR_SHIFT (PUD_SHIFT + (PTRS_PER_PTD_SHIFT))
#else
#define PGDIR_SHIFT (PMD_SHIFT + (PTRS_PER_PTD_SHIFT))
@@ -180,7 +180,7 @@
#define __S111 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RWX)
#define pgd_ERROR(e) printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e))
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
#define pud_ERROR(e) printk("%s:%d: bad pud %016lx.\n", __FILE__, __LINE__, pud_val(e))
#endif
#define pmd_ERROR(e) printk("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
@@ -281,7 +281,7 @@ extern unsigned long VMALLOC_END;
#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & _PFN_MASK))
#define pud_page(pud) virt_to_page((pud_val(pud) + PAGE_OFFSET))
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
#define pgd_none(pgd) (!pgd_val(pgd))
#define pgd_bad(pgd) (!ia64_phys_addr_valid(pgd_val(pgd)))
#define pgd_present(pgd) (pgd_val(pgd) != 0UL)
@@ -384,7 +384,7 @@ pgd_offset (const struct mm_struct *mm, unsigned long address)
here. */
#define pgd_offset_gate(mm, addr) pgd_offset_k(addr)
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
/* Find an entry in the second-level page table.. */
#define pud_offset(dir,addr) \
((pud_t *) pgd_page_vaddr(*(dir)) + (((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1)))
@@ -586,7 +586,7 @@ extern struct page *zero_page_memmap_ptr;
#define __HAVE_ARCH_PGD_OFFSET_GATE
-#ifndef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 3
#include <asm-generic/pgtable-nopud.h>
#endif
#include <asm-generic/pgtable.h>
diff --git a/arch/ia64/kernel/ivt.S b/arch/ia64/kernel/ivt.S
index 18e794a57248..e42bf7a913f3 100644
--- a/arch/ia64/kernel/ivt.S
+++ b/arch/ia64/kernel/ivt.S
@@ -146,7 +146,7 @@ ENTRY(vhpt_miss)
(p6) dep r17=r18,r19,3,(PAGE_SHIFT-3) // r17=pgd_offset for region 5
(p7) dep r17=r18,r17,3,(PAGE_SHIFT-6) // r17=pgd_offset for region[0-4]
cmp.eq p7,p6=0,r21 // unused address bits all zeroes?
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
shr.u r28=r22,PUD_SHIFT // shift pud index into position
#else
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
@@ -155,7 +155,7 @@ ENTRY(vhpt_miss)
ld8 r17=[r17] // get *pgd (may be 0)
;;
(p7) cmp.eq p6,p7=r17,r0 // was pgd_present(*pgd) == NULL?
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
dep r28=r28,r17,3,(PAGE_SHIFT-3) // r28=pud_offset(pgd,addr)
;;
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
@@ -222,13 +222,13 @@ ENTRY(vhpt_miss)
*/
ld8 r25=[r21] // read *pte again
ld8 r26=[r17] // read *pmd again
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
ld8 r19=[r28] // read *pud again
#endif
cmp.ne p6,p7=r0,r0
;;
cmp.ne.or.andcm p6,p7=r26,r20 // did *pmd change
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
cmp.ne.or.andcm p6,p7=r19,r29 // did *pud change
#endif
mov r27=PAGE_SHIFT<<2
@@ -476,7 +476,7 @@ ENTRY(nested_dtlb_miss)
(p6) dep r17=r18,r19,3,(PAGE_SHIFT-3) // r17=pgd_offset for region 5
(p7) dep r17=r18,r17,3,(PAGE_SHIFT-6) // r17=pgd_offset for region[0-4]
cmp.eq p7,p6=0,r21 // unused address bits all zeroes?
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
shr.u r18=r22,PUD_SHIFT // shift pud index into position
#else
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
@@ -487,7 +487,7 @@ ENTRY(nested_dtlb_miss)
(p7) cmp.eq p6,p7=r17,r0 // was pgd_present(*pgd) == NULL?
dep r17=r18,r17,3,(PAGE_SHIFT-3) // r17=p[u|m]d_offset(pgd,addr)
;;
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
(p7) ld8 r17=[r17] // get *pud (may be 0)
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
;;
diff --git a/arch/ia64/kernel/machine_kexec.c b/arch/ia64/kernel/machine_kexec.c
index 5151a649c96b..b72cd7a07222 100644
--- a/arch/ia64/kernel/machine_kexec.c
+++ b/arch/ia64/kernel/machine_kexec.c
@@ -156,9 +156,9 @@ void arch_crash_save_vmcoreinfo(void)
VMCOREINFO_OFFSET(node_memblk_s, start_paddr);
VMCOREINFO_OFFSET(node_memblk_s, size);
#endif
-#ifdef CONFIG_PGTABLE_3
+#if CONFIG_PGTABLE_LEVELS == 3
VMCOREINFO_CONFIG(PGTABLE_3);
-#elif defined(CONFIG_PGTABLE_4)
+#elif CONFIG_PGTABLE_LEVELS == 4
VMCOREINFO_CONFIG(PGTABLE_4);
#endif
}
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 05/19] ia64: expose number of page table levels on Kconfig level
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Tony Luck, Fenghua Yu
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
We need to define PGTABLE_LEVELS before sourcing init/Kconfig:
arch/Kconfig will define default value and it's sourced from init/Kconfig.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
---
arch/ia64/Kconfig | 18 +++++-------------
arch/ia64/include/asm/page.h | 4 ++--
arch/ia64/include/asm/pgalloc.h | 4 ++--
arch/ia64/include/asm/pgtable.h | 12 ++++++------
arch/ia64/kernel/ivt.S | 12 ++++++------
arch/ia64/kernel/machine_kexec.c | 4 ++--
6 files changed, 23 insertions(+), 31 deletions(-)
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 074e52bf815c..56313dfd9685 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -1,3 +1,8 @@
+config PGTABLE_LEVELS
+ int "Page Table Levels" if !IA64_PAGE_SIZE_64KB
+ range 3 4 if !IA64_PAGE_SIZE_64KB
+ default 4
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
@@ -286,19 +291,6 @@ config IA64_PAGE_SIZE_64KB
endchoice
-choice
- prompt "Page Table Levels"
- default PGTABLE_3
-
-config PGTABLE_3
- bool "3 Levels"
-
-config PGTABLE_4
- depends on !IA64_PAGE_SIZE_64KB
- bool "4 Levels"
-
-endchoice
-
if IA64_HP_SIM
config HZ
default 32
diff --git a/arch/ia64/include/asm/page.h b/arch/ia64/include/asm/page.h
index 1f1bf144fe62..ec48bb9f95e1 100644
--- a/arch/ia64/include/asm/page.h
+++ b/arch/ia64/include/asm/page.h
@@ -173,7 +173,7 @@ get_order (unsigned long size)
*/
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pmd; } pmd_t;
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
typedef struct { unsigned long pud; } pud_t;
#endif
typedef struct { unsigned long pgd; } pgd_t;
@@ -182,7 +182,7 @@ get_order (unsigned long size)
# define pte_val(x) ((x).pte)
# define pmd_val(x) ((x).pmd)
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
# define pud_val(x) ((x).pud)
#endif
# define pgd_val(x) ((x).pgd)
diff --git a/arch/ia64/include/asm/pgalloc.h b/arch/ia64/include/asm/pgalloc.h
index 5767cdfc08db..f5e70e961948 100644
--- a/arch/ia64/include/asm/pgalloc.h
+++ b/arch/ia64/include/asm/pgalloc.h
@@ -32,7 +32,7 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
quicklist_free(0, NULL, pgd);
}
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
static inline void
pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
{
@@ -49,7 +49,7 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
quicklist_free(0, NULL, pud);
}
#define __pud_free_tlb(tlb, pud, address) pud_free((tlb)->mm, pud)
-#endif /* CONFIG_PGTABLE_4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
static inline void
pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h
index 7b6f8801df57..9f3ed9ee8f13 100644
--- a/arch/ia64/include/asm/pgtable.h
+++ b/arch/ia64/include/asm/pgtable.h
@@ -99,7 +99,7 @@
#define PMD_MASK (~(PMD_SIZE-1))
#define PTRS_PER_PMD (1UL << (PTRS_PER_PTD_SHIFT))
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
/*
* Definitions for second level:
*
@@ -117,7 +117,7 @@
*
* PGDIR_SHIFT determines what a first-level page table entry can map.
*/
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
#define PGDIR_SHIFT (PUD_SHIFT + (PTRS_PER_PTD_SHIFT))
#else
#define PGDIR_SHIFT (PMD_SHIFT + (PTRS_PER_PTD_SHIFT))
@@ -180,7 +180,7 @@
#define __S111 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RWX)
#define pgd_ERROR(e) printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e))
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
#define pud_ERROR(e) printk("%s:%d: bad pud %016lx.\n", __FILE__, __LINE__, pud_val(e))
#endif
#define pmd_ERROR(e) printk("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
@@ -281,7 +281,7 @@ extern unsigned long VMALLOC_END;
#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & _PFN_MASK))
#define pud_page(pud) virt_to_page((pud_val(pud) + PAGE_OFFSET))
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
#define pgd_none(pgd) (!pgd_val(pgd))
#define pgd_bad(pgd) (!ia64_phys_addr_valid(pgd_val(pgd)))
#define pgd_present(pgd) (pgd_val(pgd) != 0UL)
@@ -384,7 +384,7 @@ pgd_offset (const struct mm_struct *mm, unsigned long address)
here. */
#define pgd_offset_gate(mm, addr) pgd_offset_k(addr)
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
/* Find an entry in the second-level page table.. */
#define pud_offset(dir,addr) \
((pud_t *) pgd_page_vaddr(*(dir)) + (((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1)))
@@ -586,7 +586,7 @@ extern struct page *zero_page_memmap_ptr;
#define __HAVE_ARCH_PGD_OFFSET_GATE
-#ifndef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 3
#include <asm-generic/pgtable-nopud.h>
#endif
#include <asm-generic/pgtable.h>
diff --git a/arch/ia64/kernel/ivt.S b/arch/ia64/kernel/ivt.S
index 18e794a57248..e42bf7a913f3 100644
--- a/arch/ia64/kernel/ivt.S
+++ b/arch/ia64/kernel/ivt.S
@@ -146,7 +146,7 @@ ENTRY(vhpt_miss)
(p6) dep r17=r18,r19,3,(PAGE_SHIFT-3) // r17=pgd_offset for region 5
(p7) dep r17=r18,r17,3,(PAGE_SHIFT-6) // r17=pgd_offset for region[0-4]
cmp.eq p7,p6=0,r21 // unused address bits all zeroes?
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
shr.u r28=r22,PUD_SHIFT // shift pud index into position
#else
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
@@ -155,7 +155,7 @@ ENTRY(vhpt_miss)
ld8 r17=[r17] // get *pgd (may be 0)
;;
(p7) cmp.eq p6,p7=r17,r0 // was pgd_present(*pgd) == NULL?
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
dep r28=r28,r17,3,(PAGE_SHIFT-3) // r28=pud_offset(pgd,addr)
;;
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
@@ -222,13 +222,13 @@ ENTRY(vhpt_miss)
*/
ld8 r25=[r21] // read *pte again
ld8 r26=[r17] // read *pmd again
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
ld8 r19=[r28] // read *pud again
#endif
cmp.ne p6,p7=r0,r0
;;
cmp.ne.or.andcm p6,p7=r26,r20 // did *pmd change
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
cmp.ne.or.andcm p6,p7=r19,r29 // did *pud change
#endif
mov r27=PAGE_SHIFT<<2
@@ -476,7 +476,7 @@ ENTRY(nested_dtlb_miss)
(p6) dep r17=r18,r19,3,(PAGE_SHIFT-3) // r17=pgd_offset for region 5
(p7) dep r17=r18,r17,3,(PAGE_SHIFT-6) // r17=pgd_offset for region[0-4]
cmp.eq p7,p6=0,r21 // unused address bits all zeroes?
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
shr.u r18=r22,PUD_SHIFT // shift pud index into position
#else
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
@@ -487,7 +487,7 @@ ENTRY(nested_dtlb_miss)
(p7) cmp.eq p6,p7=r17,r0 // was pgd_present(*pgd) == NULL?
dep r17=r18,r17,3,(PAGE_SHIFT-3) // r17=p[u|m]d_offset(pgd,addr)
;;
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
(p7) ld8 r17=[r17] // get *pud (may be 0)
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
;;
diff --git a/arch/ia64/kernel/machine_kexec.c b/arch/ia64/kernel/machine_kexec.c
index 5151a649c96b..b72cd7a07222 100644
--- a/arch/ia64/kernel/machine_kexec.c
+++ b/arch/ia64/kernel/machine_kexec.c
@@ -156,9 +156,9 @@ void arch_crash_save_vmcoreinfo(void)
VMCOREINFO_OFFSET(node_memblk_s, start_paddr);
VMCOREINFO_OFFSET(node_memblk_s, size);
#endif
-#ifdef CONFIG_PGTABLE_3
+#if CONFIG_PGTABLE_LEVELS == 3
VMCOREINFO_CONFIG(PGTABLE_3);
-#elif defined(CONFIG_PGTABLE_4)
+#elif CONFIG_PGTABLE_LEVELS == 4
VMCOREINFO_CONFIG(PGTABLE_4);
#endif
}
--
2.1.4
--
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see: http://www.linux-mm.org/ .
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 06/19] m32r: mark PMD folded
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov
Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
arch/m32r/include/asm/pgtable-2level.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/m32r/include/asm/pgtable-2level.h b/arch/m32r/include/asm/pgtable-2level.h
index 8fd8ee70266a..421e6ba3a173 100644
--- a/arch/m32r/include/asm/pgtable-2level.h
+++ b/arch/m32r/include/asm/pgtable-2level.h
@@ -13,6 +13,7 @@
* the M32R is two-level, so we don't really have any
* PMD directory physically.
*/
+#define __PAGETABLE_PMD_FOLDED
#define PMD_SHIFT 22
#define PTRS_PER_PMD 1
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 06/19] m32r: mark PMD folded
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov
Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
arch/m32r/include/asm/pgtable-2level.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/m32r/include/asm/pgtable-2level.h b/arch/m32r/include/asm/pgtable-2level.h
index 8fd8ee70266a..421e6ba3a173 100644
--- a/arch/m32r/include/asm/pgtable-2level.h
+++ b/arch/m32r/include/asm/pgtable-2level.h
@@ -13,6 +13,7 @@
* the M32R is two-level, so we don't really have any
* PMD directory physically.
*/
+#define __PAGETABLE_PMD_FOLDED
#define PMD_SHIFT 22
#define PTRS_PER_PMD 1
--
2.1.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 07/19] m68k: mark PMD folded and expose number of page table levels
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Geert Uytterhoeven
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
---
arch/m68k/Kconfig | 4 ++++
arch/m68k/include/asm/pgtable_mm.h | 2 ++
2 files changed, 6 insertions(+)
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 87b7c7581b1d..2dd8f63bfbbb 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -67,6 +67,10 @@ config HZ
default 1000 if CLEOPATRA
default 100
+config PGTABLE_LEVELS
+ default 2 if SUN3 || COLDFIRE
+ default 3
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/arch/m68k/include/asm/pgtable_mm.h b/arch/m68k/include/asm/pgtable_mm.h
index 28a145bfbb71..35ed4a9981ae 100644
--- a/arch/m68k/include/asm/pgtable_mm.h
+++ b/arch/m68k/include/asm/pgtable_mm.h
@@ -54,10 +54,12 @@
*/
#ifdef CONFIG_SUN3
#define PTRS_PER_PTE 16
+#define __PAGETABLE_PMD_FOLDED
#define PTRS_PER_PMD 1
#define PTRS_PER_PGD 2048
#elif defined(CONFIG_COLDFIRE)
#define PTRS_PER_PTE 512
+#define __PAGETABLE_PMD_FOLDED
#define PTRS_PER_PMD 1
#define PTRS_PER_PGD 1024
#else
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 07/19] m68k: mark PMD folded and expose number of page table levels
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Geert Uytterhoeven
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
---
arch/m68k/Kconfig | 4 ++++
arch/m68k/include/asm/pgtable_mm.h | 2 ++
2 files changed, 6 insertions(+)
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 87b7c7581b1d..2dd8f63bfbbb 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -67,6 +67,10 @@ config HZ
default 1000 if CLEOPATRA
default 100
+config PGTABLE_LEVELS
+ default 2 if SUN3 || COLDFIRE
+ default 3
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/arch/m68k/include/asm/pgtable_mm.h b/arch/m68k/include/asm/pgtable_mm.h
index 28a145bfbb71..35ed4a9981ae 100644
--- a/arch/m68k/include/asm/pgtable_mm.h
+++ b/arch/m68k/include/asm/pgtable_mm.h
@@ -54,10 +54,12 @@
*/
#ifdef CONFIG_SUN3
#define PTRS_PER_PTE 16
+#define __PAGETABLE_PMD_FOLDED
#define PTRS_PER_PMD 1
#define PTRS_PER_PGD 2048
#elif defined(CONFIG_COLDFIRE)
#define PTRS_PER_PTE 512
+#define __PAGETABLE_PMD_FOLDED
#define PTRS_PER_PMD 1
#define PTRS_PER_PGD 1024
#else
--
2.1.4
--
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 08/19] mips: expose number of page table levels on Kconfig level
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov, Ralf Baechle
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
---
arch/mips/Kconfig | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 843713c05b79..2eea81795139 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2535,6 +2535,11 @@ config STACKTRACE_SUPPORT
bool
default y
+config PGTABLE_LEVELS
+ int
+ default 3 if 64BIT && !PAGE_SIZE_64KB
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 08/19] mips: expose number of page table levels on Kconfig level
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov, Ralf Baechle
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
---
arch/mips/Kconfig | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 843713c05b79..2eea81795139 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2535,6 +2535,11 @@ config STACKTRACE_SUPPORT
bool
default y
+config PGTABLE_LEVELS
+ int
+ default 3 if 64BIT && !PAGE_SIZE_64KB
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
--
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the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 09/19] mn10300: mark PUD and PMD folded
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
David Howells, Koichi Yasutake
Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
---
arch/mn10300/include/asm/pgtable.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/mn10300/include/asm/pgtable.h b/arch/mn10300/include/asm/pgtable.h
index afab728ab65e..96d3f9deb59c 100644
--- a/arch/mn10300/include/asm/pgtable.h
+++ b/arch/mn10300/include/asm/pgtable.h
@@ -56,7 +56,9 @@ extern void paging_init(void);
#define PGDIR_SHIFT 22
#define PTRS_PER_PGD 1024
#define PTRS_PER_PUD 1 /* we don't really have any PUD physically */
+#define __PAGETABLE_PUD_FOLDED
#define PTRS_PER_PMD 1 /* we don't really have any PMD physically */
+#define __PAGETABLE_PMD_FOLDED
#define PTRS_PER_PTE 1024
#define PGD_SIZE PAGE_SIZE
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 09/19] mn10300: mark PUD and PMD folded
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
David Howells, Koichi Yasutake
Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
---
arch/mn10300/include/asm/pgtable.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/mn10300/include/asm/pgtable.h b/arch/mn10300/include/asm/pgtable.h
index afab728ab65e..96d3f9deb59c 100644
--- a/arch/mn10300/include/asm/pgtable.h
+++ b/arch/mn10300/include/asm/pgtable.h
@@ -56,7 +56,9 @@ extern void paging_init(void);
#define PGDIR_SHIFT 22
#define PTRS_PER_PGD 1024
#define PTRS_PER_PUD 1 /* we don't really have any PUD physically */
+#define __PAGETABLE_PUD_FOLDED
#define PTRS_PER_PMD 1 /* we don't really have any PMD physically */
+#define __PAGETABLE_PMD_FOLDED
#define PTRS_PER_PTE 1024
#define PGD_SIZE PAGE_SIZE
--
2.1.4
--
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 10/19] parisc: expose number of page table levels on Kconfig level
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
James E.J. Bottomley, Helge Deller
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
---
arch/parisc/Kconfig | 5 +++++
arch/parisc/include/asm/pgalloc.h | 2 +-
arch/parisc/include/asm/pgtable.h | 17 ++++++++---------
arch/parisc/kernel/entry.S | 4 ++--
arch/parisc/kernel/head.S | 4 ++--
arch/parisc/mm/init.c | 2 +-
6 files changed, 19 insertions(+), 15 deletions(-)
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 1554a6f2a5bb..1899d65b283c 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -103,6 +103,11 @@ config ARCH_MAY_HAVE_PC_FDC
depends on BROKEN
default y
+config PGTABLE_LEVELS
+ int
+ default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/arch/parisc/include/asm/pgalloc.h b/arch/parisc/include/asm/pgalloc.h
index f213f5b4c423..55ad8be9b7f3 100644
--- a/arch/parisc/include/asm/pgalloc.h
+++ b/arch/parisc/include/asm/pgalloc.h
@@ -51,7 +51,7 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
free_pages((unsigned long)pgd, PGD_ALLOC_ORDER);
}
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
/* Three Level Page Table Support for pmd's */
diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
index 8c966b2270aa..0a183756d6ec 100644
--- a/arch/parisc/include/asm/pgtable.h
+++ b/arch/parisc/include/asm/pgtable.h
@@ -68,13 +68,11 @@ extern void purge_tlb_entries(struct mm_struct *, unsigned long);
#define KERNEL_INITIAL_ORDER 24 /* 0 to 1<<24 = 16MB */
#define KERNEL_INITIAL_SIZE (1 << KERNEL_INITIAL_ORDER)
-#if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
-#define PT_NLEVELS 3
+#if CONFIG_PGTABLE_LEVELS == 3
#define PGD_ORDER 1 /* Number of pages per pgd */
#define PMD_ORDER 1 /* Number of pages per pmd */
#define PGD_ALLOC_ORDER 2 /* first pgd contains pmd */
#else
-#define PT_NLEVELS 2
#define PGD_ORDER 1 /* Number of pages per pgd */
#define PGD_ALLOC_ORDER PGD_ORDER
#endif
@@ -93,9 +91,10 @@ extern void purge_tlb_entries(struct mm_struct *, unsigned long);
#define PMD_SHIFT (PLD_SHIFT + BITS_PER_PTE)
#define PMD_SIZE (1UL << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE-1))
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
#define BITS_PER_PMD (PAGE_SHIFT + PMD_ORDER - BITS_PER_PMD_ENTRY)
#else
+#define __PAGETABLE_PMD_FOLDED
#define BITS_PER_PMD 0
#endif
#define PTRS_PER_PMD (1UL << BITS_PER_PMD)
@@ -276,7 +275,7 @@ extern unsigned long *empty_zero_page;
#define pgd_flag(x) (pgd_val(x) & PxD_FLAG_MASK)
#define pgd_address(x) ((unsigned long)(pgd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT)
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
/* The first entry of the permanent pmd is not there if it contains
* the gateway marker */
#define pmd_none(x) (!pmd_val(x) || pmd_flag(x) == PxD_FLAG_ATTACHED)
@@ -286,7 +285,7 @@ extern unsigned long *empty_zero_page;
#define pmd_bad(x) (!(pmd_flag(x) & PxD_FLAG_VALID))
#define pmd_present(x) (pmd_flag(x) & PxD_FLAG_PRESENT)
static inline void pmd_clear(pmd_t *pmd) {
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
if (pmd_flag(*pmd) & PxD_FLAG_ATTACHED)
/* This is the entry pointing to the permanent pmd
* attached to the pgd; cannot clear it */
@@ -298,7 +297,7 @@ static inline void pmd_clear(pmd_t *pmd) {
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
#define pgd_page_vaddr(pgd) ((unsigned long) __va(pgd_address(pgd)))
#define pgd_page(pgd) virt_to_page((void *)pgd_page_vaddr(pgd))
@@ -308,7 +307,7 @@ static inline void pmd_clear(pmd_t *pmd) {
#define pgd_bad(x) (!(pgd_flag(x) & PxD_FLAG_VALID))
#define pgd_present(x) (pgd_flag(x) & PxD_FLAG_PRESENT)
static inline void pgd_clear(pgd_t *pgd) {
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
if(pgd_flag(*pgd) & PxD_FLAG_ATTACHED)
/* This is the permanent pmd attached to the pgd; cannot
* free it */
@@ -392,7 +391,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
/* Find an entry in the second-level page table.. */
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
#define pmd_offset(dir,address) \
((pmd_t *) pgd_page_vaddr(*(dir)) + (((address)>>PMD_SHIFT) & (PTRS_PER_PMD-1)))
#else
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index e8f07dd28401..2cd5fb8798a8 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -398,7 +398,7 @@
* can address up to 1TB
*/
.macro L2_ptep pmd,pte,index,va,fault
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
extru \va,31-ASM_PMD_SHIFT,ASM_BITS_PER_PMD,\index
#else
# if defined(CONFIG_64BIT)
@@ -436,7 +436,7 @@
* all ILP32 processes and all the kernel for machines with
* under 4GB of memory) */
.macro L3_ptep pgd,pte,index,va,fault
-#if PT_NLEVELS == 3 /* we might have a 2-Level scheme, e.g. with 16kb page size */
+#if CONFIG_PGTABLE_LEVELS == 3 /* we might have a 2-Level scheme, e.g. with 16kb page size */
extrd,u \va,63-ASM_PGDIR_SHIFT,ASM_BITS_PER_PGD,\index
copy %r0,\pte
extrd,u,*= \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0
diff --git a/arch/parisc/kernel/head.S b/arch/parisc/kernel/head.S
index d4dc588c0dc1..e7d64527aff9 100644
--- a/arch/parisc/kernel/head.S
+++ b/arch/parisc/kernel/head.S
@@ -74,7 +74,7 @@ $bss_loop:
mtctl %r4,%cr24 /* Initialize kernel root pointer */
mtctl %r4,%cr25 /* Initialize user root pointer */
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
/* Set pmd in pgd */
load32 PA(pmd0),%r5
shrd %r5,PxD_VALUE_SHIFT,%r3
@@ -97,7 +97,7 @@ $bss_loop:
stw %r3,0(%r4)
ldo (PAGE_SIZE >> PxD_VALUE_SHIFT)(%r3),%r3
addib,> -1,%r1,1b
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
ldo ASM_PMD_ENTRY_SIZE(%r4),%r4
#else
ldo ASM_PGD_ENTRY_SIZE(%r4),%r4
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 0bef864264c0..849226b0f21e 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -34,7 +34,7 @@
extern int data_start;
extern void parisc_kernel_start(void); /* Kernel entry point in head.S */
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
/* NOTE: This layout exactly conforms to the hybrid L2/L3 page table layout
* with the first pmd adjacent to the pgd and below it. gcc doesn't actually
* guarantee that global objects will be laid out in memory in the same order
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 10/19] parisc: expose number of page table levels on Kconfig level
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
James E.J. Bottomley, Helge Deller
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
---
arch/parisc/Kconfig | 5 +++++
arch/parisc/include/asm/pgalloc.h | 2 +-
arch/parisc/include/asm/pgtable.h | 17 ++++++++---------
arch/parisc/kernel/entry.S | 4 ++--
arch/parisc/kernel/head.S | 4 ++--
arch/parisc/mm/init.c | 2 +-
6 files changed, 19 insertions(+), 15 deletions(-)
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 1554a6f2a5bb..1899d65b283c 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -103,6 +103,11 @@ config ARCH_MAY_HAVE_PC_FDC
depends on BROKEN
default y
+config PGTABLE_LEVELS
+ int
+ default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/arch/parisc/include/asm/pgalloc.h b/arch/parisc/include/asm/pgalloc.h
index f213f5b4c423..55ad8be9b7f3 100644
--- a/arch/parisc/include/asm/pgalloc.h
+++ b/arch/parisc/include/asm/pgalloc.h
@@ -51,7 +51,7 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
free_pages((unsigned long)pgd, PGD_ALLOC_ORDER);
}
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
/* Three Level Page Table Support for pmd's */
diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
index 8c966b2270aa..0a183756d6ec 100644
--- a/arch/parisc/include/asm/pgtable.h
+++ b/arch/parisc/include/asm/pgtable.h
@@ -68,13 +68,11 @@ extern void purge_tlb_entries(struct mm_struct *, unsigned long);
#define KERNEL_INITIAL_ORDER 24 /* 0 to 1<<24 = 16MB */
#define KERNEL_INITIAL_SIZE (1 << KERNEL_INITIAL_ORDER)
-#if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
-#define PT_NLEVELS 3
+#if CONFIG_PGTABLE_LEVELS == 3
#define PGD_ORDER 1 /* Number of pages per pgd */
#define PMD_ORDER 1 /* Number of pages per pmd */
#define PGD_ALLOC_ORDER 2 /* first pgd contains pmd */
#else
-#define PT_NLEVELS 2
#define PGD_ORDER 1 /* Number of pages per pgd */
#define PGD_ALLOC_ORDER PGD_ORDER
#endif
@@ -93,9 +91,10 @@ extern void purge_tlb_entries(struct mm_struct *, unsigned long);
#define PMD_SHIFT (PLD_SHIFT + BITS_PER_PTE)
#define PMD_SIZE (1UL << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE-1))
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
#define BITS_PER_PMD (PAGE_SHIFT + PMD_ORDER - BITS_PER_PMD_ENTRY)
#else
+#define __PAGETABLE_PMD_FOLDED
#define BITS_PER_PMD 0
#endif
#define PTRS_PER_PMD (1UL << BITS_PER_PMD)
@@ -276,7 +275,7 @@ extern unsigned long *empty_zero_page;
#define pgd_flag(x) (pgd_val(x) & PxD_FLAG_MASK)
#define pgd_address(x) ((unsigned long)(pgd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT)
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
/* The first entry of the permanent pmd is not there if it contains
* the gateway marker */
#define pmd_none(x) (!pmd_val(x) || pmd_flag(x) == PxD_FLAG_ATTACHED)
@@ -286,7 +285,7 @@ extern unsigned long *empty_zero_page;
#define pmd_bad(x) (!(pmd_flag(x) & PxD_FLAG_VALID))
#define pmd_present(x) (pmd_flag(x) & PxD_FLAG_PRESENT)
static inline void pmd_clear(pmd_t *pmd) {
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
if (pmd_flag(*pmd) & PxD_FLAG_ATTACHED)
/* This is the entry pointing to the permanent pmd
* attached to the pgd; cannot clear it */
@@ -298,7 +297,7 @@ static inline void pmd_clear(pmd_t *pmd) {
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
#define pgd_page_vaddr(pgd) ((unsigned long) __va(pgd_address(pgd)))
#define pgd_page(pgd) virt_to_page((void *)pgd_page_vaddr(pgd))
@@ -308,7 +307,7 @@ static inline void pmd_clear(pmd_t *pmd) {
#define pgd_bad(x) (!(pgd_flag(x) & PxD_FLAG_VALID))
#define pgd_present(x) (pgd_flag(x) & PxD_FLAG_PRESENT)
static inline void pgd_clear(pgd_t *pgd) {
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
if(pgd_flag(*pgd) & PxD_FLAG_ATTACHED)
/* This is the permanent pmd attached to the pgd; cannot
* free it */
@@ -392,7 +391,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
/* Find an entry in the second-level page table.. */
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
#define pmd_offset(dir,address) \
((pmd_t *) pgd_page_vaddr(*(dir)) + (((address)>>PMD_SHIFT) & (PTRS_PER_PMD-1)))
#else
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index e8f07dd28401..2cd5fb8798a8 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -398,7 +398,7 @@
* can address up to 1TB
*/
.macro L2_ptep pmd,pte,index,va,fault
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
extru \va,31-ASM_PMD_SHIFT,ASM_BITS_PER_PMD,\index
#else
# if defined(CONFIG_64BIT)
@@ -436,7 +436,7 @@
* all ILP32 processes and all the kernel for machines with
* under 4GB of memory) */
.macro L3_ptep pgd,pte,index,va,fault
-#if PT_NLEVELS == 3 /* we might have a 2-Level scheme, e.g. with 16kb page size */
+#if CONFIG_PGTABLE_LEVELS == 3 /* we might have a 2-Level scheme, e.g. with 16kb page size */
extrd,u \va,63-ASM_PGDIR_SHIFT,ASM_BITS_PER_PGD,\index
copy %r0,\pte
extrd,u,*= \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0
diff --git a/arch/parisc/kernel/head.S b/arch/parisc/kernel/head.S
index d4dc588c0dc1..e7d64527aff9 100644
--- a/arch/parisc/kernel/head.S
+++ b/arch/parisc/kernel/head.S
@@ -74,7 +74,7 @@ $bss_loop:
mtctl %r4,%cr24 /* Initialize kernel root pointer */
mtctl %r4,%cr25 /* Initialize user root pointer */
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
/* Set pmd in pgd */
load32 PA(pmd0),%r5
shrd %r5,PxD_VALUE_SHIFT,%r3
@@ -97,7 +97,7 @@ $bss_loop:
stw %r3,0(%r4)
ldo (PAGE_SIZE >> PxD_VALUE_SHIFT)(%r3),%r3
addib,> -1,%r1,1b
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
ldo ASM_PMD_ENTRY_SIZE(%r4),%r4
#else
ldo ASM_PGD_ENTRY_SIZE(%r4),%r4
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 0bef864264c0..849226b0f21e 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -34,7 +34,7 @@
extern int data_start;
extern void parisc_kernel_start(void); /* Kernel entry point in head.S */
-#if PT_NLEVELS == 3
+#if CONFIG_PGTABLE_LEVELS == 3
/* NOTE: This layout exactly conforms to the hybrid L2/L3 page table layout
* with the first pmd adjacent to the pgd and below it. gcc doesn't actually
* guarantee that global objects will be laid out in memory in the same order
--
2.1.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 11/19] powerpc: expose number of page table levels on Kconfig level
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Benjamin Herrenschmidt, Paul Mackerras, Michael Ellerman
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/Kconfig | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 22b0940494bb..4c0c744fa297 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -297,6 +297,12 @@ config ZONE_DMA32
bool
default y if PPC64
+config PGTABLE_LEVELS
+ int
+ default 2 if !PPC64
+ default 3 if 64K_PAGES
+ default 4
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 11/19] powerpc: expose number of page table levels on Kconfig level
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Benjamin Herrenschmidt, Paul Mackerras, Michael Ellerman
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/Kconfig | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 22b0940494bb..4c0c744fa297 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -297,6 +297,12 @@ config ZONE_DMA32
bool
default y if PPC64
+config PGTABLE_LEVELS
+ int
+ default 2 if !PPC64
+ default 3 if 64K_PAGES
+ default 4
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 12/19] s390: expose number of page table levels
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Martin Schwidefsky, Heiko Carstens
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
---
arch/s390/Kconfig | 5 +++++
arch/s390/include/asm/pgtable.h | 2 ++
2 files changed, 7 insertions(+)
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 8d11babf9aa5..ddf9ebd4c254 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -155,6 +155,11 @@ config S390
config SCHED_OMIT_FRAME_POINTER
def_bool y
+config PGTABLE_LEVELS
+ int
+ default 4 if 64BI
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index fbb5ee3ae57c..e08ec38f8c6e 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -91,7 +91,9 @@ extern unsigned long zero_page_mask;
*/
#define PTRS_PER_PTE 256
#ifndef CONFIG_64BIT
+#define __PAGETABLE_PUD_FOLDED
#define PTRS_PER_PMD 1
+#define __PAGETABLE_PMD_FOLDED
#define PTRS_PER_PUD 1
#else /* CONFIG_64BIT */
#define PTRS_PER_PMD 2048
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 12/19] s390: expose number of page table levels
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Martin Schwidefsky, Heiko Carstens
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
---
arch/s390/Kconfig | 5 +++++
arch/s390/include/asm/pgtable.h | 2 ++
2 files changed, 7 insertions(+)
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 8d11babf9aa5..ddf9ebd4c254 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -155,6 +155,11 @@ config S390
config SCHED_OMIT_FRAME_POINTER
def_bool y
+config PGTABLE_LEVELS
+ int
+ default 4 if 64BI
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index fbb5ee3ae57c..e08ec38f8c6e 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -91,7 +91,9 @@ extern unsigned long zero_page_mask;
*/
#define PTRS_PER_PTE 256
#ifndef CONFIG_64BIT
+#define __PAGETABLE_PUD_FOLDED
#define PTRS_PER_PMD 1
+#define __PAGETABLE_PMD_FOLDED
#define PTRS_PER_PUD 1
#else /* CONFIG_64BIT */
#define PTRS_PER_PMD 2048
--
2.1.4
--
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the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 13/19] sh: expose number of page table levels
2015-01-30 14:43 ` Kirill A. Shutemov
(?)
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov, linux-sh
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: linux-sh@vger.kernel.org
---
arch/sh/Kconfig | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index eb4ef274ae9b..50057fed819d 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -162,6 +162,10 @@ config NEED_DMA_MAP_STATE
config NEED_SG_DMA_LENGTH
def_bool y
+config PGTABLE_LEVELS
+ default 3 if X2TLB
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 13/19] sh: expose number of page table levels
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov, linux-sh
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: linux-sh@vger.kernel.org
---
arch/sh/Kconfig | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index eb4ef274ae9b..50057fed819d 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -162,6 +162,10 @@ config NEED_DMA_MAP_STATE
config NEED_SG_DMA_LENGTH
def_bool y
+config PGTABLE_LEVELS
+ default 3 if X2TLB
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 13/19] sh: expose number of page table levels
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov, linux-sh
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: linux-sh@vger.kernel.org
---
arch/sh/Kconfig | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index eb4ef274ae9b..50057fed819d 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -162,6 +162,10 @@ config NEED_DMA_MAP_STATE
config NEED_SG_DMA_LENGTH
def_bool y
+config PGTABLE_LEVELS
+ default 3 if X2TLB
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 14/19] sparc: expose number of page table levels
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
David S. Miller
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
---
arch/sparc/Kconfig | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 96ac69c5eba0..cb06f5433e12 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -143,6 +143,10 @@ config GENERIC_ISA_DMA
config ARCH_SUPPORTS_DEBUG_PAGEALLOC
def_bool y if SPARC64
+config PGTABLE_LEVELS
+ default 4 if 64BIT
+ default 3
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 14/19] sparc: expose number of page table levels
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
David S. Miller
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
---
arch/sparc/Kconfig | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 96ac69c5eba0..cb06f5433e12 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -143,6 +143,10 @@ config GENERIC_ISA_DMA
config ARCH_SUPPORTS_DEBUG_PAGEALLOC
def_bool y if SPARC64
+config PGTABLE_LEVELS
+ default 4 if 64BIT
+ default 3
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 15/19] tile: expose number of page table levels
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov, Chris Metcalf
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
---
arch/tile/Kconfig | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 7cca41842a9e..0142d578b5a8 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -147,6 +147,11 @@ config ARCH_DEFCONFIG
default "arch/tile/configs/tilepro_defconfig" if !TILEGX
default "arch/tile/configs/tilegx_defconfig" if TILEGX
+config PGTABLE_LEVELS
+ int
+ default 3 if 64BIT
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 15/19] tile: expose number of page table levels
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov, Chris Metcalf
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
---
arch/tile/Kconfig | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 7cca41842a9e..0142d578b5a8 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -147,6 +147,11 @@ config ARCH_DEFCONFIG
default "arch/tile/configs/tilepro_defconfig" if !TILEGX
default "arch/tile/configs/tilegx_defconfig" if TILEGX
+config PGTABLE_LEVELS
+ int
+ default 3 if 64BIT
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 16/19] um: expose number of page table levels
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Jeff Dike, Richard Weinberger
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
---
arch/um/Kconfig.um | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/um/Kconfig.um b/arch/um/Kconfig.um
index a7520c90f62d..5dbfe3d9107c 100644
--- a/arch/um/Kconfig.um
+++ b/arch/um/Kconfig.um
@@ -155,3 +155,8 @@ config MMAPPER
config NO_DMA
def_bool y
+
+config PGTABLE_LEVELS
+ int
+ default 3 if 3_LEVEL_PGTABLES
+ default 2
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 16/19] um: expose number of page table levels
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Jeff Dike, Richard Weinberger
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
---
arch/um/Kconfig.um | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/um/Kconfig.um b/arch/um/Kconfig.um
index a7520c90f62d..5dbfe3d9107c 100644
--- a/arch/um/Kconfig.um
+++ b/arch/um/Kconfig.um
@@ -155,3 +155,8 @@ config MMAPPER
config NO_DMA
def_bool y
+
+config PGTABLE_LEVELS
+ int
+ default 3 if 3_LEVEL_PGTABLES
+ default 2
--
2.1.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 17/19] x86: expose number of page table levels on Kconfig level
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Thomas Gleixner, Ingo Molnar, H. Peter Anvin
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
---
arch/x86/Kconfig | 6 ++++++
arch/x86/include/asm/paravirt.h | 8 ++++----
arch/x86/include/asm/paravirt_types.h | 8 ++++----
arch/x86/include/asm/pgalloc.h | 8 ++++----
arch/x86/include/asm/pgtable-2level_types.h | 1 -
arch/x86/include/asm/pgtable-3level_types.h | 2 --
arch/x86/include/asm/pgtable.h | 8 ++++----
arch/x86/include/asm/pgtable_64_types.h | 1 -
arch/x86/include/asm/pgtable_types.h | 4 ++--
arch/x86/kernel/paravirt.c | 6 +++---
arch/x86/mm/pgtable.c | 14 +++++++-------
arch/x86/xen/mmu.c | 14 +++++++-------
12 files changed, 41 insertions(+), 39 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d34ef0852f41..ec1a161cb855 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -278,6 +278,12 @@ config ARCH_SUPPORTS_UPROBES
config FIX_EARLYCON_MEM
def_bool y
+config PGTABLE_LEVELS
+ int
+ default 4 if X86_64
+ default 3 if X86_PAE
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 32444ae939ca..7ced2aaab829 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -545,7 +545,7 @@ static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, val);
}
-#if PAGETABLE_LEVELS >= 3
+#if CONFIG_PGTABLE_LEVELS >= 3
static inline pmd_t __pmd(pmdval_t val)
{
pmdval_t ret;
@@ -585,7 +585,7 @@ static inline void set_pud(pud_t *pudp, pud_t pud)
PVOP_VCALL2(pv_mmu_ops.set_pud, pudp,
val);
}
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
static inline pud_t __pud(pudval_t val)
{
pudval_t ret;
@@ -636,9 +636,9 @@ static inline void pud_clear(pud_t *pudp)
set_pud(pudp, __pud(0));
}
-#endif /* PAGETABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
-#endif /* PAGETABLE_LEVELS >= 3 */
+#endif /* CONFIG_PGTABLE_LEVELS >= 3 */
#ifdef CONFIG_X86_PAE
/* Special-case pte-setting operations for PAE, which can't update a
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 7549b8b369e4..f7b0b5c112f2 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -294,7 +294,7 @@ struct pv_mmu_ops {
struct paravirt_callee_save pgd_val;
struct paravirt_callee_save make_pgd;
-#if PAGETABLE_LEVELS >= 3
+#if CONFIG_PGTABLE_LEVELS >= 3
#ifdef CONFIG_X86_PAE
void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
void (*pte_clear)(struct mm_struct *mm, unsigned long addr,
@@ -308,13 +308,13 @@ struct pv_mmu_ops {
struct paravirt_callee_save pmd_val;
struct paravirt_callee_save make_pmd;
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
struct paravirt_callee_save pud_val;
struct paravirt_callee_save make_pud;
void (*set_pgd)(pgd_t *pudp, pgd_t pgdval);
-#endif /* PAGETABLE_LEVELS == 4 */
-#endif /* PAGETABLE_LEVELS >= 3 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS >= 3 */
struct pv_lazy_ops lazy_mode;
diff --git a/arch/x86/include/asm/pgalloc.h b/arch/x86/include/asm/pgalloc.h
index c4412e972bbd..bf7f8b55b0f9 100644
--- a/arch/x86/include/asm/pgalloc.h
+++ b/arch/x86/include/asm/pgalloc.h
@@ -77,7 +77,7 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
#define pmd_pgtable(pmd) pmd_page(pmd)
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
struct page *page;
@@ -116,7 +116,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
}
#endif /* CONFIG_X86_PAE */
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
{
paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
@@ -142,7 +142,7 @@ static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
___pud_free_tlb(tlb, pud);
}
-#endif /* PAGETABLE_LEVELS > 3 */
-#endif /* PAGETABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
#endif /* _ASM_X86_PGALLOC_H */
diff --git a/arch/x86/include/asm/pgtable-2level_types.h b/arch/x86/include/asm/pgtable-2level_types.h
index daacc23e3fb9..392576433e77 100644
--- a/arch/x86/include/asm/pgtable-2level_types.h
+++ b/arch/x86/include/asm/pgtable-2level_types.h
@@ -17,7 +17,6 @@ typedef union {
#endif /* !__ASSEMBLY__ */
#define SHARED_KERNEL_PMD 0
-#define PAGETABLE_LEVELS 2
/*
* traditional i386 two-level paging structure:
diff --git a/arch/x86/include/asm/pgtable-3level_types.h b/arch/x86/include/asm/pgtable-3level_types.h
index 1bd5876c8649..bcc89625ebe5 100644
--- a/arch/x86/include/asm/pgtable-3level_types.h
+++ b/arch/x86/include/asm/pgtable-3level_types.h
@@ -24,8 +24,6 @@ typedef union {
#define SHARED_KERNEL_PMD 1
#endif
-#define PAGETABLE_LEVELS 3
-
/*
* PGDIR_SHIFT determines what a top-level page table entry can map
*/
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 9d0ade00923e..f89d6c9943ea 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -554,7 +554,7 @@ static inline unsigned long pages_to_mb(unsigned long npg)
return npg >> (20 - PAGE_SHIFT);
}
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
static inline int pud_none(pud_t pud)
{
return native_pud_val(pud) == 0;
@@ -597,9 +597,9 @@ static inline int pud_large(pud_t pud)
{
return 0;
}
-#endif /* PAGETABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
static inline int pgd_present(pgd_t pgd)
{
return pgd_flags(pgd) & _PAGE_PRESENT;
@@ -636,7 +636,7 @@ static inline int pgd_none(pgd_t pgd)
{
return !native_pgd_val(pgd);
}
-#endif /* PAGETABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
#endif /* __ASSEMBLY__ */
diff --git a/arch/x86/include/asm/pgtable_64_types.h b/arch/x86/include/asm/pgtable_64_types.h
index 602b6028c5b6..e6844dfb4471 100644
--- a/arch/x86/include/asm/pgtable_64_types.h
+++ b/arch/x86/include/asm/pgtable_64_types.h
@@ -20,7 +20,6 @@ typedef struct { pteval_t pte; } pte_t;
#endif /* !__ASSEMBLY__ */
#define SHARED_KERNEL_PMD 0
-#define PAGETABLE_LEVELS 4
/*
* PGDIR_SHIFT determines what a top-level page table entry can map
diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h
index 8c7c10802e9c..78f0c8cbe316 100644
--- a/arch/x86/include/asm/pgtable_types.h
+++ b/arch/x86/include/asm/pgtable_types.h
@@ -234,7 +234,7 @@ static inline pgdval_t pgd_flags(pgd_t pgd)
return native_pgd_val(pgd) & PTE_FLAGS_MASK;
}
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
typedef struct { pudval_t pud; } pud_t;
static inline pud_t native_make_pud(pmdval_t val)
@@ -255,7 +255,7 @@ static inline pudval_t native_pud_val(pud_t pud)
}
#endif
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
typedef struct { pmdval_t pmd; } pmd_t;
static inline pmd_t native_make_pmd(pmdval_t val)
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 548d25f00c90..c614dd492f5f 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -443,7 +443,7 @@ struct pv_mmu_ops pv_mmu_ops = {
.ptep_modify_prot_start = __ptep_modify_prot_start,
.ptep_modify_prot_commit = __ptep_modify_prot_commit,
-#if PAGETABLE_LEVELS >= 3
+#if CONFIG_PGTABLE_LEVELS >= 3
#ifdef CONFIG_X86_PAE
.set_pte_atomic = native_set_pte_atomic,
.pte_clear = native_pte_clear,
@@ -454,13 +454,13 @@ struct pv_mmu_ops pv_mmu_ops = {
.pmd_val = PTE_IDENT,
.make_pmd = PTE_IDENT,
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
.pud_val = PTE_IDENT,
.make_pud = PTE_IDENT,
.set_pgd = native_set_pgd,
#endif
-#endif /* PAGETABLE_LEVELS >= 3 */
+#endif /* CONFIG_PGTABLE_LEVELS >= 3 */
.pte_val = PTE_IDENT,
.pgd_val = PTE_IDENT,
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 7b22adaad4f1..9885592b9fa7 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -58,7 +58,7 @@ void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
tlb_remove_page(tlb, pte);
}
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
{
struct page *page = virt_to_page(pmd);
@@ -74,14 +74,14 @@ void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
tlb_remove_page(tlb, page);
}
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud)
{
paravirt_release_pud(__pa(pud) >> PAGE_SHIFT);
tlb_remove_page(tlb, virt_to_page(pud));
}
-#endif /* PAGETABLE_LEVELS > 3 */
-#endif /* PAGETABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
static inline void pgd_list_add(pgd_t *pgd)
{
@@ -117,9 +117,9 @@ static void pgd_ctor(struct mm_struct *mm, pgd_t *pgd)
/* If the pgd points to a shared pagetable level (either the
ptes in non-PAE, or shared PMD in PAE), then just copy the
references from swapper_pg_dir. */
- if (PAGETABLE_LEVELS == 2 ||
- (PAGETABLE_LEVELS == 3 && SHARED_KERNEL_PMD) ||
- PAGETABLE_LEVELS == 4) {
+ if (CONFIG_PGTABLE_LEVELS == 2 ||
+ (CONFIG_PGTABLE_LEVELS == 3 && SHARED_KERNEL_PMD) ||
+ CONFIG_PGTABLE_LEVELS == 4) {
clone_pgd_range(pgd + KERNEL_PGD_BOUNDARY,
swapper_pg_dir + KERNEL_PGD_BOUNDARY,
KERNEL_PGD_PTRS);
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index adca9e2b6553..65083ad63b6f 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -502,7 +502,7 @@ __visible pmd_t xen_make_pmd(pmdval_t pmd)
}
PV_CALLEE_SAVE_REGS_THUNK(xen_make_pmd);
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
__visible pudval_t xen_pud_val(pud_t pud)
{
return pte_mfn_to_pfn(pud.pud);
@@ -589,7 +589,7 @@ static void xen_set_pgd(pgd_t *ptr, pgd_t val)
xen_mc_issue(PARAVIRT_LAZY_MMU);
}
-#endif /* PAGETABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
/*
* (Yet another) pagetable walker. This one is intended for pinning a
@@ -1628,7 +1628,7 @@ static void xen_release_pmd(unsigned long pfn)
xen_release_ptpage(pfn, PT_PMD);
}
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
static void xen_alloc_pud(struct mm_struct *mm, unsigned long pfn)
{
xen_alloc_ptpage(mm, pfn, PT_PUD);
@@ -2046,7 +2046,7 @@ static void __init xen_post_allocator_init(void)
pv_mmu_ops.set_pte = xen_set_pte;
pv_mmu_ops.set_pmd = xen_set_pmd;
pv_mmu_ops.set_pud = xen_set_pud;
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
pv_mmu_ops.set_pgd = xen_set_pgd;
#endif
@@ -2056,7 +2056,7 @@ static void __init xen_post_allocator_init(void)
pv_mmu_ops.alloc_pmd = xen_alloc_pmd;
pv_mmu_ops.release_pte = xen_release_pte;
pv_mmu_ops.release_pmd = xen_release_pmd;
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
pv_mmu_ops.alloc_pud = xen_alloc_pud;
pv_mmu_ops.release_pud = xen_release_pud;
#endif
@@ -2122,14 +2122,14 @@ static const struct pv_mmu_ops xen_mmu_ops __initconst = {
.make_pmd = PV_CALLEE_SAVE(xen_make_pmd),
.pmd_val = PV_CALLEE_SAVE(xen_pmd_val),
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
.pud_val = PV_CALLEE_SAVE(xen_pud_val),
.make_pud = PV_CALLEE_SAVE(xen_make_pud),
.set_pgd = xen_set_pgd_hyper,
.alloc_pud = xen_alloc_pmd_init,
.release_pud = xen_release_pmd_init,
-#endif /* PAGETABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
.activate_mm = xen_activate_mm,
.dup_mmap = xen_dup_mmap,
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 17/19] x86: expose number of page table levels on Kconfig level
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Thomas Gleixner, Ingo Molnar, H. Peter Anvin
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
---
arch/x86/Kconfig | 6 ++++++
arch/x86/include/asm/paravirt.h | 8 ++++----
arch/x86/include/asm/paravirt_types.h | 8 ++++----
arch/x86/include/asm/pgalloc.h | 8 ++++----
arch/x86/include/asm/pgtable-2level_types.h | 1 -
arch/x86/include/asm/pgtable-3level_types.h | 2 --
arch/x86/include/asm/pgtable.h | 8 ++++----
arch/x86/include/asm/pgtable_64_types.h | 1 -
arch/x86/include/asm/pgtable_types.h | 4 ++--
arch/x86/kernel/paravirt.c | 6 +++---
arch/x86/mm/pgtable.c | 14 +++++++-------
arch/x86/xen/mmu.c | 14 +++++++-------
12 files changed, 41 insertions(+), 39 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d34ef0852f41..ec1a161cb855 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -278,6 +278,12 @@ config ARCH_SUPPORTS_UPROBES
config FIX_EARLYCON_MEM
def_bool y
+config PGTABLE_LEVELS
+ int
+ default 4 if X86_64
+ default 3 if X86_PAE
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 32444ae939ca..7ced2aaab829 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -545,7 +545,7 @@ static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, val);
}
-#if PAGETABLE_LEVELS >= 3
+#if CONFIG_PGTABLE_LEVELS >= 3
static inline pmd_t __pmd(pmdval_t val)
{
pmdval_t ret;
@@ -585,7 +585,7 @@ static inline void set_pud(pud_t *pudp, pud_t pud)
PVOP_VCALL2(pv_mmu_ops.set_pud, pudp,
val);
}
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
static inline pud_t __pud(pudval_t val)
{
pudval_t ret;
@@ -636,9 +636,9 @@ static inline void pud_clear(pud_t *pudp)
set_pud(pudp, __pud(0));
}
-#endif /* PAGETABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
-#endif /* PAGETABLE_LEVELS >= 3 */
+#endif /* CONFIG_PGTABLE_LEVELS >= 3 */
#ifdef CONFIG_X86_PAE
/* Special-case pte-setting operations for PAE, which can't update a
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 7549b8b369e4..f7b0b5c112f2 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -294,7 +294,7 @@ struct pv_mmu_ops {
struct paravirt_callee_save pgd_val;
struct paravirt_callee_save make_pgd;
-#if PAGETABLE_LEVELS >= 3
+#if CONFIG_PGTABLE_LEVELS >= 3
#ifdef CONFIG_X86_PAE
void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
void (*pte_clear)(struct mm_struct *mm, unsigned long addr,
@@ -308,13 +308,13 @@ struct pv_mmu_ops {
struct paravirt_callee_save pmd_val;
struct paravirt_callee_save make_pmd;
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
struct paravirt_callee_save pud_val;
struct paravirt_callee_save make_pud;
void (*set_pgd)(pgd_t *pudp, pgd_t pgdval);
-#endif /* PAGETABLE_LEVELS == 4 */
-#endif /* PAGETABLE_LEVELS >= 3 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS >= 3 */
struct pv_lazy_ops lazy_mode;
diff --git a/arch/x86/include/asm/pgalloc.h b/arch/x86/include/asm/pgalloc.h
index c4412e972bbd..bf7f8b55b0f9 100644
--- a/arch/x86/include/asm/pgalloc.h
+++ b/arch/x86/include/asm/pgalloc.h
@@ -77,7 +77,7 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
#define pmd_pgtable(pmd) pmd_page(pmd)
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
struct page *page;
@@ -116,7 +116,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
}
#endif /* CONFIG_X86_PAE */
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
{
paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
@@ -142,7 +142,7 @@ static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
___pud_free_tlb(tlb, pud);
}
-#endif /* PAGETABLE_LEVELS > 3 */
-#endif /* PAGETABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
#endif /* _ASM_X86_PGALLOC_H */
diff --git a/arch/x86/include/asm/pgtable-2level_types.h b/arch/x86/include/asm/pgtable-2level_types.h
index daacc23e3fb9..392576433e77 100644
--- a/arch/x86/include/asm/pgtable-2level_types.h
+++ b/arch/x86/include/asm/pgtable-2level_types.h
@@ -17,7 +17,6 @@ typedef union {
#endif /* !__ASSEMBLY__ */
#define SHARED_KERNEL_PMD 0
-#define PAGETABLE_LEVELS 2
/*
* traditional i386 two-level paging structure:
diff --git a/arch/x86/include/asm/pgtable-3level_types.h b/arch/x86/include/asm/pgtable-3level_types.h
index 1bd5876c8649..bcc89625ebe5 100644
--- a/arch/x86/include/asm/pgtable-3level_types.h
+++ b/arch/x86/include/asm/pgtable-3level_types.h
@@ -24,8 +24,6 @@ typedef union {
#define SHARED_KERNEL_PMD 1
#endif
-#define PAGETABLE_LEVELS 3
-
/*
* PGDIR_SHIFT determines what a top-level page table entry can map
*/
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 9d0ade00923e..f89d6c9943ea 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -554,7 +554,7 @@ static inline unsigned long pages_to_mb(unsigned long npg)
return npg >> (20 - PAGE_SHIFT);
}
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
static inline int pud_none(pud_t pud)
{
return native_pud_val(pud) == 0;
@@ -597,9 +597,9 @@ static inline int pud_large(pud_t pud)
{
return 0;
}
-#endif /* PAGETABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
static inline int pgd_present(pgd_t pgd)
{
return pgd_flags(pgd) & _PAGE_PRESENT;
@@ -636,7 +636,7 @@ static inline int pgd_none(pgd_t pgd)
{
return !native_pgd_val(pgd);
}
-#endif /* PAGETABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
#endif /* __ASSEMBLY__ */
diff --git a/arch/x86/include/asm/pgtable_64_types.h b/arch/x86/include/asm/pgtable_64_types.h
index 602b6028c5b6..e6844dfb4471 100644
--- a/arch/x86/include/asm/pgtable_64_types.h
+++ b/arch/x86/include/asm/pgtable_64_types.h
@@ -20,7 +20,6 @@ typedef struct { pteval_t pte; } pte_t;
#endif /* !__ASSEMBLY__ */
#define SHARED_KERNEL_PMD 0
-#define PAGETABLE_LEVELS 4
/*
* PGDIR_SHIFT determines what a top-level page table entry can map
diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h
index 8c7c10802e9c..78f0c8cbe316 100644
--- a/arch/x86/include/asm/pgtable_types.h
+++ b/arch/x86/include/asm/pgtable_types.h
@@ -234,7 +234,7 @@ static inline pgdval_t pgd_flags(pgd_t pgd)
return native_pgd_val(pgd) & PTE_FLAGS_MASK;
}
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
typedef struct { pudval_t pud; } pud_t;
static inline pud_t native_make_pud(pmdval_t val)
@@ -255,7 +255,7 @@ static inline pudval_t native_pud_val(pud_t pud)
}
#endif
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
typedef struct { pmdval_t pmd; } pmd_t;
static inline pmd_t native_make_pmd(pmdval_t val)
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 548d25f00c90..c614dd492f5f 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -443,7 +443,7 @@ struct pv_mmu_ops pv_mmu_ops = {
.ptep_modify_prot_start = __ptep_modify_prot_start,
.ptep_modify_prot_commit = __ptep_modify_prot_commit,
-#if PAGETABLE_LEVELS >= 3
+#if CONFIG_PGTABLE_LEVELS >= 3
#ifdef CONFIG_X86_PAE
.set_pte_atomic = native_set_pte_atomic,
.pte_clear = native_pte_clear,
@@ -454,13 +454,13 @@ struct pv_mmu_ops pv_mmu_ops = {
.pmd_val = PTE_IDENT,
.make_pmd = PTE_IDENT,
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
.pud_val = PTE_IDENT,
.make_pud = PTE_IDENT,
.set_pgd = native_set_pgd,
#endif
-#endif /* PAGETABLE_LEVELS >= 3 */
+#endif /* CONFIG_PGTABLE_LEVELS >= 3 */
.pte_val = PTE_IDENT,
.pgd_val = PTE_IDENT,
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 7b22adaad4f1..9885592b9fa7 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -58,7 +58,7 @@ void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
tlb_remove_page(tlb, pte);
}
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
{
struct page *page = virt_to_page(pmd);
@@ -74,14 +74,14 @@ void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
tlb_remove_page(tlb, page);
}
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud)
{
paravirt_release_pud(__pa(pud) >> PAGE_SHIFT);
tlb_remove_page(tlb, virt_to_page(pud));
}
-#endif /* PAGETABLE_LEVELS > 3 */
-#endif /* PAGETABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
static inline void pgd_list_add(pgd_t *pgd)
{
@@ -117,9 +117,9 @@ static void pgd_ctor(struct mm_struct *mm, pgd_t *pgd)
/* If the pgd points to a shared pagetable level (either the
ptes in non-PAE, or shared PMD in PAE), then just copy the
references from swapper_pg_dir. */
- if (PAGETABLE_LEVELS == 2 ||
- (PAGETABLE_LEVELS == 3 && SHARED_KERNEL_PMD) ||
- PAGETABLE_LEVELS == 4) {
+ if (CONFIG_PGTABLE_LEVELS == 2 ||
+ (CONFIG_PGTABLE_LEVELS == 3 && SHARED_KERNEL_PMD) ||
+ CONFIG_PGTABLE_LEVELS == 4) {
clone_pgd_range(pgd + KERNEL_PGD_BOUNDARY,
swapper_pg_dir + KERNEL_PGD_BOUNDARY,
KERNEL_PGD_PTRS);
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index adca9e2b6553..65083ad63b6f 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -502,7 +502,7 @@ __visible pmd_t xen_make_pmd(pmdval_t pmd)
}
PV_CALLEE_SAVE_REGS_THUNK(xen_make_pmd);
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
__visible pudval_t xen_pud_val(pud_t pud)
{
return pte_mfn_to_pfn(pud.pud);
@@ -589,7 +589,7 @@ static void xen_set_pgd(pgd_t *ptr, pgd_t val)
xen_mc_issue(PARAVIRT_LAZY_MMU);
}
-#endif /* PAGETABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
/*
* (Yet another) pagetable walker. This one is intended for pinning a
@@ -1628,7 +1628,7 @@ static void xen_release_pmd(unsigned long pfn)
xen_release_ptpage(pfn, PT_PMD);
}
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
static void xen_alloc_pud(struct mm_struct *mm, unsigned long pfn)
{
xen_alloc_ptpage(mm, pfn, PT_PUD);
@@ -2046,7 +2046,7 @@ static void __init xen_post_allocator_init(void)
pv_mmu_ops.set_pte = xen_set_pte;
pv_mmu_ops.set_pmd = xen_set_pmd;
pv_mmu_ops.set_pud = xen_set_pud;
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
pv_mmu_ops.set_pgd = xen_set_pgd;
#endif
@@ -2056,7 +2056,7 @@ static void __init xen_post_allocator_init(void)
pv_mmu_ops.alloc_pmd = xen_alloc_pmd;
pv_mmu_ops.release_pte = xen_release_pte;
pv_mmu_ops.release_pmd = xen_release_pmd;
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
pv_mmu_ops.alloc_pud = xen_alloc_pud;
pv_mmu_ops.release_pud = xen_release_pud;
#endif
@@ -2122,14 +2122,14 @@ static const struct pv_mmu_ops xen_mmu_ops __initconst = {
.make_pmd = PV_CALLEE_SAVE(xen_make_pmd),
.pmd_val = PV_CALLEE_SAVE(xen_pmd_val),
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
.pud_val = PV_CALLEE_SAVE(xen_pud_val),
.make_pud = PV_CALLEE_SAVE(xen_make_pud),
.set_pgd = xen_set_pgd_hyper,
.alloc_pud = xen_alloc_pmd_init,
.release_pud = xen_release_pmd_init,
-#endif /* PAGETABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
.activate_mm = xen_activate_mm,
.dup_mmap = xen_dup_mmap,
--
2.1.4
--
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 18/19] mm: define default PGTABLE_LEVELS to two
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov
By this time all architectures which support more than two page table
levels should be covered. This patch add default definiton of
PGTABLE_LEVELS equal 2.
We also add assert to detect inconsistence between CONFIG_PGTABLE_LEVELS
and __PAGETABLE_PMD_FOLDED/__PAGETABLE_PUD_FOLDED.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
arch/Kconfig | 4 ++++
include/asm-generic/pgtable.h | 5 +++++
2 files changed, 9 insertions(+)
diff --git a/arch/Kconfig b/arch/Kconfig
index 05d7a8a458d5..a9c95d36ba70 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -484,6 +484,10 @@ config HAVE_IRQ_EXIT_ON_IRQ_STACK
This spares a stack switch and improves cache usage on softirq
processing.
+config PGTABLE_LEVELS
+ int
+ default 2
+
#
# ABI hall of shame
#
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 4d46085c1b90..1f9f5da6828f 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -7,6 +7,11 @@
#include <linux/mm_types.h>
#include <linux/bug.h>
+#if 4 - defined(__PAGETABLE_PUD_FOLDED) - defined(__PAGETABLE_PMD_FOLDED) != \
+ CONFIG_PGTABLE_LEVELS
+#error CONFIG_PGTABLE_LEVELS is not consistent with __PAGETABLE_{PUD,PMD}_FOLDED
+#endif
+
/*
* On almost all architectures and configurations, 0 can be used as the
* upper ceiling to free_pgtables(): on many architectures it has the same
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 18/19] mm: define default PGTABLE_LEVELS to two
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov
By this time all architectures which support more than two page table
levels should be covered. This patch add default definiton of
PGTABLE_LEVELS equal 2.
We also add assert to detect inconsistence between CONFIG_PGTABLE_LEVELS
and __PAGETABLE_PMD_FOLDED/__PAGETABLE_PUD_FOLDED.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
arch/Kconfig | 4 ++++
include/asm-generic/pgtable.h | 5 +++++
2 files changed, 9 insertions(+)
diff --git a/arch/Kconfig b/arch/Kconfig
index 05d7a8a458d5..a9c95d36ba70 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -484,6 +484,10 @@ config HAVE_IRQ_EXIT_ON_IRQ_STACK
This spares a stack switch and improves cache usage on softirq
processing.
+config PGTABLE_LEVELS
+ int
+ default 2
+
#
# ABI hall of shame
#
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 4d46085c1b90..1f9f5da6828f 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -7,6 +7,11 @@
#include <linux/mm_types.h>
#include <linux/bug.h>
+#if 4 - defined(__PAGETABLE_PUD_FOLDED) - defined(__PAGETABLE_PMD_FOLDED) != \
+ CONFIG_PGTABLE_LEVELS
+#error CONFIG_PGTABLE_LEVELS is not consistent with __PAGETABLE_{PUD,PMD}_FOLDED
+#endif
+
/*
* On almost all architectures and configurations, 0 can be used as the
* upper ceiling to free_pgtables(): on many architectures it has the same
--
2.1.4
--
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 19/19] mm: do not add nr_pmds into mm_struct if PMD is folded
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:43 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov
CONFIG_PGTABLE_LEVELS is now available on every architecture and we can
use it to check if we need to add nr_pmds into mm_struct.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
include/linux/mm_types.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 199a03aab8dc..590630eb59ba 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -364,7 +364,9 @@ struct mm_struct {
atomic_t mm_users; /* How many users with user space? */
atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */
atomic_long_t nr_ptes; /* PTE page table pages */
+#if CONFIG_PGTABLE_LEVELS > 2
atomic_long_t nr_pmds; /* PMD page table pages */
+#endif
int map_count; /* number of VMAs */
spinlock_t page_table_lock; /* Protects page tables and some counters */
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH 19/19] mm: do not add nr_pmds into mm_struct if PMD is folded
@ 2015-01-30 14:43 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:43 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov
CONFIG_PGTABLE_LEVELS is now available on every architecture and we can
use it to check if we need to add nr_pmds into mm_struct.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
include/linux/mm_types.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 199a03aab8dc..590630eb59ba 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -364,7 +364,9 @@ struct mm_struct {
atomic_t mm_users; /* How many users with user space? */
atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */
atomic_long_t nr_ptes; /* PTE page table pages */
+#if CONFIG_PGTABLE_LEVELS > 2
atomic_long_t nr_pmds; /* PMD page table pages */
+#endif
int map_count; /* number of VMAs */
spinlock_t page_table_lock; /* Protects page tables and some counters */
--
2.1.4
--
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* Re: [PATCH 12/19] s390: expose number of page table levels
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:48 ` Martin Schwidefsky
-1 siblings, 0 replies; 93+ messages in thread
From: Martin Schwidefsky @ 2015-01-30 14:48 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Andrew Morton, linux-mm, linux-kernel, Guenter Roeck, Heiko Carstens
On Fri, 30 Jan 2015 16:43:21 +0200
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> wrote:
> diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
> index 8d11babf9aa5..ddf9ebd4c254 100644
> --- a/arch/s390/Kconfig
> +++ b/arch/s390/Kconfig
> @@ -155,6 +155,11 @@ config S390
> config SCHED_OMIT_FRAME_POINTER
> def_bool y
>
> +config PGTABLE_LEVELS
> + int
> + default 4 if 64BI
^^^^ 64BIT
> + default 2
> +
> source "init/Kconfig"
--
blue skies,
Martin.
"Reality continues to ruin my life." - Calvin.
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 12/19] s390: expose number of page table levels
@ 2015-01-30 14:48 ` Martin Schwidefsky
0 siblings, 0 replies; 93+ messages in thread
From: Martin Schwidefsky @ 2015-01-30 14:48 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Andrew Morton, linux-mm, linux-kernel, Guenter Roeck, Heiko Carstens
On Fri, 30 Jan 2015 16:43:21 +0200
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> wrote:
> diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
> index 8d11babf9aa5..ddf9ebd4c254 100644
> --- a/arch/s390/Kconfig
> +++ b/arch/s390/Kconfig
> @@ -155,6 +155,11 @@ config S390
> config SCHED_OMIT_FRAME_POINTER
> def_bool y
>
> +config PGTABLE_LEVELS
> + int
> + default 4 if 64BI
^^^^ 64BIT
> + default 2
> +
> source "init/Kconfig"
--
blue skies,
Martin.
"Reality continues to ruin my life." - Calvin.
--
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 15/19] tile: expose number of page table levels
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:49 ` Chris Metcalf
-1 siblings, 0 replies; 93+ messages in thread
From: Chris Metcalf @ 2015-01-30 14:49 UTC (permalink / raw)
To: Kirill A. Shutemov, Andrew Morton; +Cc: linux-mm, linux-kernel, Guenter Roeck
On 1/30/2015 9:43 AM, Kirill A. Shutemov wrote:
> We would want to use number of page table level to define mm_struct.
> Let's expose it as CONFIG_PGTABLE_LEVELS.
>
> Signed-off-by: Kirill A. Shutemov<kirill.shutemov@linux.intel.com>
> Cc: Chris Metcalf<cmetcalf@ezchip.com>
> ---
> arch/tile/Kconfig | 5 +++++
> 1 file changed, 5 insertions(+)
Acked-by: Chris Metcalf <cmetcalf@ezchip.com>
--
Chris Metcalf, EZChip Semiconductor
http://www.ezchip.com
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 15/19] tile: expose number of page table levels
@ 2015-01-30 14:49 ` Chris Metcalf
0 siblings, 0 replies; 93+ messages in thread
From: Chris Metcalf @ 2015-01-30 14:49 UTC (permalink / raw)
To: Kirill A. Shutemov, Andrew Morton; +Cc: linux-mm, linux-kernel, Guenter Roeck
On 1/30/2015 9:43 AM, Kirill A. Shutemov wrote:
> We would want to use number of page table level to define mm_struct.
> Let's expose it as CONFIG_PGTABLE_LEVELS.
>
> Signed-off-by: Kirill A. Shutemov<kirill.shutemov@linux.intel.com>
> Cc: Chris Metcalf<cmetcalf@ezchip.com>
> ---
> arch/tile/Kconfig | 5 +++++
> 1 file changed, 5 insertions(+)
Acked-by: Chris Metcalf <cmetcalf@ezchip.com>
--
Chris Metcalf, EZChip Semiconductor
http://www.ezchip.com
--
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^ permalink raw reply [flat|nested] 93+ messages in thread
* [PATCHv2 12/19] s390: expose number of page table levels
2015-01-30 14:48 ` Martin Schwidefsky
@ 2015-01-30 14:54 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:54 UTC (permalink / raw)
To: Martin Schwidefsky, Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Heiko Carstens
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
---
v2: fix typo
---
arch/s390/Kconfig | 5 +++++
arch/s390/include/asm/pgtable.h | 2 ++
2 files changed, 7 insertions(+)
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 8d11babf9aa5..6870e6ab903f 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -155,6 +155,11 @@ config S390
config SCHED_OMIT_FRAME_POINTER
def_bool y
+config PGTABLE_LEVELS
+ int
+ default 4 if 64BIT
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index fbb5ee3ae57c..e08ec38f8c6e 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -91,7 +91,9 @@ extern unsigned long zero_page_mask;
*/
#define PTRS_PER_PTE 256
#ifndef CONFIG_64BIT
+#define __PAGETABLE_PUD_FOLDED
#define PTRS_PER_PMD 1
+#define __PAGETABLE_PMD_FOLDED
#define PTRS_PER_PUD 1
#else /* CONFIG_64BIT */
#define PTRS_PER_PMD 2048
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCHv2 12/19] s390: expose number of page table levels
@ 2015-01-30 14:54 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 14:54 UTC (permalink / raw)
To: Martin Schwidefsky, Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Heiko Carstens
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
---
v2: fix typo
---
arch/s390/Kconfig | 5 +++++
arch/s390/include/asm/pgtable.h | 2 ++
2 files changed, 7 insertions(+)
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 8d11babf9aa5..6870e6ab903f 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -155,6 +155,11 @@ config S390
config SCHED_OMIT_FRAME_POINTER
def_bool y
+config PGTABLE_LEVELS
+ int
+ default 4 if 64BIT
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index fbb5ee3ae57c..e08ec38f8c6e 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -91,7 +91,9 @@ extern unsigned long zero_page_mask;
*/
#define PTRS_PER_PTE 256
#ifndef CONFIG_64BIT
+#define __PAGETABLE_PUD_FOLDED
#define PTRS_PER_PMD 1
+#define __PAGETABLE_PMD_FOLDED
#define PTRS_PER_PUD 1
#else /* CONFIG_64BIT */
#define PTRS_PER_PMD 2048
--
2.1.4
--
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* Re: [PATCH 02/19] arm64: expose number of page table levels on Kconfig level
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 14:56 ` Catalin Marinas
-1 siblings, 0 replies; 93+ messages in thread
From: Catalin Marinas @ 2015-01-30 14:56 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Andrew Morton, linux-mm, linux-kernel, Guenter Roeck, Will Deacon
On Fri, Jan 30, 2015 at 02:43:11PM +0000, Kirill A. Shutemov wrote:
> We would want to use number of page table level to define mm_struct.
> Let's expose it as CONFIG_PGTABLE_LEVELS.
>
> ARM64_PGTABLE_LEVELS is renamed to PGTABLE_LEVELS and defined before
> sourcing init/Kconfig: arch/Kconfig will define default value and it's
> sourced from init/Kconfig.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will.deacon@arm.com>
It looks fine.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 02/19] arm64: expose number of page table levels on Kconfig level
@ 2015-01-30 14:56 ` Catalin Marinas
0 siblings, 0 replies; 93+ messages in thread
From: Catalin Marinas @ 2015-01-30 14:56 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Andrew Morton, linux-mm, linux-kernel, Guenter Roeck, Will Deacon
On Fri, Jan 30, 2015 at 02:43:11PM +0000, Kirill A. Shutemov wrote:
> We would want to use number of page table level to define mm_struct.
> Let's expose it as CONFIG_PGTABLE_LEVELS.
>
> ARM64_PGTABLE_LEVELS is renamed to PGTABLE_LEVELS and defined before
> sourcing init/Kconfig: arch/Kconfig will define default value and it's
> sourced from init/Kconfig.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will.deacon@arm.com>
It looks fine.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 03/19] arm: expose number of page table levels on Kconfig level
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 16:02 ` Russell King - ARM Linux
-1 siblings, 0 replies; 93+ messages in thread
From: Russell King - ARM Linux @ 2015-01-30 16:02 UTC (permalink / raw)
To: Kirill A. Shutemov; +Cc: Andrew Morton, linux-mm, linux-kernel, Guenter Roeck
It'd be nice to see the cover for this series so that people know the
reason behind this change is. Maybe it'd be a good idea to add a
pointer or some description below the "---" to such patches which
are otherwise totally meaningless to the people you add to the Cc
line?
On Fri, Jan 30, 2015 at 04:43:12PM +0200, Kirill A. Shutemov wrote:
> We would want to use number of page table level to define mm_struct.
> Let's expose it as CONFIG_PGTABLE_LEVELS.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Cc: Russell King <linux@arm.linux.org.uk>
> ---
> arch/arm/Kconfig | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 4211507e2bca..d7dca652573f 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -286,6 +286,11 @@ config GENERIC_BUG
> def_bool y
> depends on BUG
>
> +config PGTABLE_LEVELS
> + int
> + default 3 if ARM_LPAE
> + default 2
> +
> source "init/Kconfig"
>
> source "kernel/Kconfig.freezer"
> --
> 2.1.4
>
--
FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up
according to speedtest.net.
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 03/19] arm: expose number of page table levels on Kconfig level
@ 2015-01-30 16:02 ` Russell King - ARM Linux
0 siblings, 0 replies; 93+ messages in thread
From: Russell King - ARM Linux @ 2015-01-30 16:02 UTC (permalink / raw)
To: Kirill A. Shutemov; +Cc: Andrew Morton, linux-mm, linux-kernel, Guenter Roeck
It'd be nice to see the cover for this series so that people know the
reason behind this change is. Maybe it'd be a good idea to add a
pointer or some description below the "---" to such patches which
are otherwise totally meaningless to the people you add to the Cc
line?
On Fri, Jan 30, 2015 at 04:43:12PM +0200, Kirill A. Shutemov wrote:
> We would want to use number of page table level to define mm_struct.
> Let's expose it as CONFIG_PGTABLE_LEVELS.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Cc: Russell King <linux@arm.linux.org.uk>
> ---
> arch/arm/Kconfig | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 4211507e2bca..d7dca652573f 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -286,6 +286,11 @@ config GENERIC_BUG
> def_bool y
> depends on BUG
>
> +config PGTABLE_LEVELS
> + int
> + default 3 if ARM_LPAE
> + default 2
> +
> source "init/Kconfig"
>
> source "kernel/Kconfig.freezer"
> --
> 2.1.4
>
--
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according to speedtest.net.
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 03/19] arm: expose number of page table levels on Kconfig level
2015-01-30 16:02 ` Russell King - ARM Linux
@ 2015-01-30 16:24 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 16:24 UTC (permalink / raw)
To: Russell King - ARM Linux
Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel, Guenter Roeck
On Fri, Jan 30, 2015 at 04:02:13PM +0000, Russell King - ARM Linux wrote:
> It'd be nice to see the cover for this series so that people know the
> reason behind this change is. Maybe it'd be a good idea to add a
> pointer or some description below the "---" to such patches which
> are otherwise totally meaningless to the people you add to the Cc
> line?
Okay, some background:
I've implemented accounting for pmd page tables as we have for pte (see
mm->nr_ptes). It's requires a new counter in mm_struct: mm->nr_pmds.
But the feature doesn't make any sense if an architecture has PMD level
folded and it would be nice get rid of the counter in this case.
The problem is that we cannot use __PAGETABLE_PMD_FOLDED in
<linux/mm_types.h> due to circular dependencies:
<linux/mm_types> -> <asm/pgtable.h> -> <linux/mm_types.h>
In most cases <asm/pgtable.h> wants <linux/mm_types.h> to get definition
of struct page and struct vm_area_struct. I've tried to split mm_struct
into separate header file to be able to user <asm/pgtable.h> there.
But it doesn't fly on some architectures, including ARM: it wants
mm_struct <asm/pgtable.h> to implement tlb flushing. I don't see how to
fix it without massive de-inlining or coverting a lot for inline functions
to macros.
This is other approach: expose number of page tables in use via Kconfig
and use it in <linux/mm_types.h> instead of __PAGETABLE_PMD_FOLDED from
<asm/pgtable.h>.
--
Kirill A. Shutemov
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 03/19] arm: expose number of page table levels on Kconfig level
@ 2015-01-30 16:24 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 16:24 UTC (permalink / raw)
To: Russell King - ARM Linux
Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel, Guenter Roeck
On Fri, Jan 30, 2015 at 04:02:13PM +0000, Russell King - ARM Linux wrote:
> It'd be nice to see the cover for this series so that people know the
> reason behind this change is. Maybe it'd be a good idea to add a
> pointer or some description below the "---" to such patches which
> are otherwise totally meaningless to the people you add to the Cc
> line?
Okay, some background:
I've implemented accounting for pmd page tables as we have for pte (see
mm->nr_ptes). It's requires a new counter in mm_struct: mm->nr_pmds.
But the feature doesn't make any sense if an architecture has PMD level
folded and it would be nice get rid of the counter in this case.
The problem is that we cannot use __PAGETABLE_PMD_FOLDED in
<linux/mm_types.h> due to circular dependencies:
<linux/mm_types> -> <asm/pgtable.h> -> <linux/mm_types.h>
In most cases <asm/pgtable.h> wants <linux/mm_types.h> to get definition
of struct page and struct vm_area_struct. I've tried to split mm_struct
into separate header file to be able to user <asm/pgtable.h> there.
But it doesn't fly on some architectures, including ARM: it wants
mm_struct <asm/pgtable.h> to implement tlb flushing. I don't see how to
fix it without massive de-inlining or coverting a lot for inline functions
to macros.
This is other approach: expose number of page tables in use via Kconfig
and use it in <linux/mm_types.h> instead of __PAGETABLE_PMD_FOLDED from
<asm/pgtable.h>.
--
Kirill A. Shutemov
--
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 17:26 ` Guenter Roeck
-1 siblings, 0 replies; 93+ messages in thread
From: Guenter Roeck @ 2015-01-30 17:26 UTC (permalink / raw)
To: Kirill A. Shutemov; +Cc: Andrew Morton, linux-mm, linux-kernel
On Fri, Jan 30, 2015 at 04:43:09PM +0200, Kirill A. Shutemov wrote:
> I've failed my attempt on split up mm_struct into separate header file to
> be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
> too much breakage and requires massive de-inlining of some architectures
> (notably ARM and S390 with PGSTE).
>
> This is other approach: expose number of page table levels on Kconfig
> level and use it to get rid of nr_pmds in mm_struct.
>
Hi Kirill,
Can I pull this series from somewhere ?
Thanks,
Guenter
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
@ 2015-01-30 17:26 ` Guenter Roeck
0 siblings, 0 replies; 93+ messages in thread
From: Guenter Roeck @ 2015-01-30 17:26 UTC (permalink / raw)
To: Kirill A. Shutemov; +Cc: Andrew Morton, linux-mm, linux-kernel
On Fri, Jan 30, 2015 at 04:43:09PM +0200, Kirill A. Shutemov wrote:
> I've failed my attempt on split up mm_struct into separate header file to
> be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
> too much breakage and requires massive de-inlining of some architectures
> (notably ARM and S390 with PGSTE).
>
> This is other approach: expose number of page table levels on Kconfig
> level and use it to get rid of nr_pmds in mm_struct.
>
Hi Kirill,
Can I pull this series from somewhere ?
Thanks,
Guenter
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
2015-01-30 17:26 ` Guenter Roeck
@ 2015-01-30 18:50 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 18:50 UTC (permalink / raw)
To: Guenter Roeck; +Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel
On Fri, Jan 30, 2015 at 09:26:13AM -0800, Guenter Roeck wrote:
> On Fri, Jan 30, 2015 at 04:43:09PM +0200, Kirill A. Shutemov wrote:
> > I've failed my attempt on split up mm_struct into separate header file to
> > be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
> > too much breakage and requires massive de-inlining of some architectures
> > (notably ARM and S390 with PGSTE).
> >
> > This is other approach: expose number of page table levels on Kconfig
> > level and use it to get rid of nr_pmds in mm_struct.
> >
> Hi Kirill,
>
> Can I pull this series from somewhere ?
Just pushed:
git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git config_pgtable_levels
--
Kirill A. Shutemov
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
@ 2015-01-30 18:50 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 18:50 UTC (permalink / raw)
To: Guenter Roeck; +Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel
On Fri, Jan 30, 2015 at 09:26:13AM -0800, Guenter Roeck wrote:
> On Fri, Jan 30, 2015 at 04:43:09PM +0200, Kirill A. Shutemov wrote:
> > I've failed my attempt on split up mm_struct into separate header file to
> > be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
> > too much breakage and requires massive de-inlining of some architectures
> > (notably ARM and S390 with PGSTE).
> >
> > This is other approach: expose number of page table levels on Kconfig
> > level and use it to get rid of nr_pmds in mm_struct.
> >
> Hi Kirill,
>
> Can I pull this series from somewhere ?
Just pushed:
git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git config_pgtable_levels
--
Kirill A. Shutemov
--
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
2015-01-30 18:50 ` Kirill A. Shutemov
@ 2015-01-30 19:14 ` Guenter Roeck
-1 siblings, 0 replies; 93+ messages in thread
From: Guenter Roeck @ 2015-01-30 19:14 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel
On Fri, Jan 30, 2015 at 08:50:52PM +0200, Kirill A. Shutemov wrote:
> On Fri, Jan 30, 2015 at 09:26:13AM -0800, Guenter Roeck wrote:
> > On Fri, Jan 30, 2015 at 04:43:09PM +0200, Kirill A. Shutemov wrote:
> > > I've failed my attempt on split up mm_struct into separate header file to
> > > be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
> > > too much breakage and requires massive de-inlining of some architectures
> > > (notably ARM and S390 with PGSTE).
> > >
> > > This is other approach: expose number of page table levels on Kconfig
> > > level and use it to get rid of nr_pmds in mm_struct.
> > >
> > Hi Kirill,
> >
> > Can I pull this series from somewhere ?
>
> Just pushed:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git config_pgtable_levels
>
Great. Pushed into my 'testing' branch. I'll let you know how it goes.
Guenter
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
@ 2015-01-30 19:14 ` Guenter Roeck
0 siblings, 0 replies; 93+ messages in thread
From: Guenter Roeck @ 2015-01-30 19:14 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel
On Fri, Jan 30, 2015 at 08:50:52PM +0200, Kirill A. Shutemov wrote:
> On Fri, Jan 30, 2015 at 09:26:13AM -0800, Guenter Roeck wrote:
> > On Fri, Jan 30, 2015 at 04:43:09PM +0200, Kirill A. Shutemov wrote:
> > > I've failed my attempt on split up mm_struct into separate header file to
> > > be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
> > > too much breakage and requires massive de-inlining of some architectures
> > > (notably ARM and S390 with PGSTE).
> > >
> > > This is other approach: expose number of page table levels on Kconfig
> > > level and use it to get rid of nr_pmds in mm_struct.
> > >
> > Hi Kirill,
> >
> > Can I pull this series from somewhere ?
>
> Just pushed:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git config_pgtable_levels
>
Great. Pushed into my 'testing' branch. I'll let you know how it goes.
Guenter
--
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 16/19] um: expose number of page table levels
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-30 19:29 ` Richard Weinberger
-1 siblings, 0 replies; 93+ messages in thread
From: Richard Weinberger @ 2015-01-30 19:29 UTC (permalink / raw)
To: Kirill A. Shutemov, Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Jeff Dike
Am 30.01.2015 um 15:43 schrieb Kirill A. Shutemov:
> We would want to use number of page table level to define mm_struct.
> Let's expose it as CONFIG_PGTABLE_LEVELS.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Cc: Jeff Dike <jdike@addtoit.com>
> Cc: Richard Weinberger <richard@nod.at>
Acked-by: Richard Weinberger <richard@nod.at>
Thanks,
//richard
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 16/19] um: expose number of page table levels
@ 2015-01-30 19:29 ` Richard Weinberger
0 siblings, 0 replies; 93+ messages in thread
From: Richard Weinberger @ 2015-01-30 19:29 UTC (permalink / raw)
To: Kirill A. Shutemov, Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Jeff Dike
Am 30.01.2015 um 15:43 schrieb Kirill A. Shutemov:
> We would want to use number of page table level to define mm_struct.
> Let's expose it as CONFIG_PGTABLE_LEVELS.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Cc: Jeff Dike <jdike@addtoit.com>
> Cc: Richard Weinberger <richard@nod.at>
Acked-by: Richard Weinberger <richard@nod.at>
Thanks,
//richard
--
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
2015-01-30 19:14 ` Guenter Roeck
@ 2015-01-30 20:09 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 20:09 UTC (permalink / raw)
To: Guenter Roeck; +Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel
On Fri, Jan 30, 2015 at 11:14:35AM -0800, Guenter Roeck wrote:
> On Fri, Jan 30, 2015 at 08:50:52PM +0200, Kirill A. Shutemov wrote:
> > On Fri, Jan 30, 2015 at 09:26:13AM -0800, Guenter Roeck wrote:
> > > On Fri, Jan 30, 2015 at 04:43:09PM +0200, Kirill A. Shutemov wrote:
> > > > I've failed my attempt on split up mm_struct into separate header file to
> > > > be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
> > > > too much breakage and requires massive de-inlining of some architectures
> > > > (notably ARM and S390 with PGSTE).
> > > >
> > > > This is other approach: expose number of page table levels on Kconfig
> > > > level and use it to get rid of nr_pmds in mm_struct.
> > > >
> > > Hi Kirill,
> > >
> > > Can I pull this series from somewhere ?
> >
> > Just pushed:
> >
> > git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git config_pgtable_levels
> >
>
> Great. Pushed into my 'testing' branch. I'll let you know how it goes.
0-DAY kernel testing has already reported few issues on blackfin, ia64 and
x86 with xen.
--
Kirill A. Shutemov
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
@ 2015-01-30 20:09 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-30 20:09 UTC (permalink / raw)
To: Guenter Roeck; +Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel
On Fri, Jan 30, 2015 at 11:14:35AM -0800, Guenter Roeck wrote:
> On Fri, Jan 30, 2015 at 08:50:52PM +0200, Kirill A. Shutemov wrote:
> > On Fri, Jan 30, 2015 at 09:26:13AM -0800, Guenter Roeck wrote:
> > > On Fri, Jan 30, 2015 at 04:43:09PM +0200, Kirill A. Shutemov wrote:
> > > > I've failed my attempt on split up mm_struct into separate header file to
> > > > be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
> > > > too much breakage and requires massive de-inlining of some architectures
> > > > (notably ARM and S390 with PGSTE).
> > > >
> > > > This is other approach: expose number of page table levels on Kconfig
> > > > level and use it to get rid of nr_pmds in mm_struct.
> > > >
> > > Hi Kirill,
> > >
> > > Can I pull this series from somewhere ?
> >
> > Just pushed:
> >
> > git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git config_pgtable_levels
> >
>
> Great. Pushed into my 'testing' branch. I'll let you know how it goes.
0-DAY kernel testing has already reported few issues on blackfin, ia64 and
x86 with xen.
--
Kirill A. Shutemov
--
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
2015-01-30 20:09 ` Kirill A. Shutemov
@ 2015-01-30 20:41 ` Guenter Roeck
-1 siblings, 0 replies; 93+ messages in thread
From: Guenter Roeck @ 2015-01-30 20:41 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel
On Fri, Jan 30, 2015 at 10:09:56PM +0200, Kirill A. Shutemov wrote:
> On Fri, Jan 30, 2015 at 11:14:35AM -0800, Guenter Roeck wrote:
> > On Fri, Jan 30, 2015 at 08:50:52PM +0200, Kirill A. Shutemov wrote:
> > > On Fri, Jan 30, 2015 at 09:26:13AM -0800, Guenter Roeck wrote:
> > > > On Fri, Jan 30, 2015 at 04:43:09PM +0200, Kirill A. Shutemov wrote:
> > > > > I've failed my attempt on split up mm_struct into separate header file to
> > > > > be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
> > > > > too much breakage and requires massive de-inlining of some architectures
> > > > > (notably ARM and S390 with PGSTE).
> > > > >
> > > > > This is other approach: expose number of page table levels on Kconfig
> > > > > level and use it to get rid of nr_pmds in mm_struct.
> > > > >
> > > > Hi Kirill,
> > > >
> > > > Can I pull this series from somewhere ?
> > >
> > > Just pushed:
> > >
> > > git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git config_pgtable_levels
> > >
> >
> > Great. Pushed into my 'testing' branch. I'll let you know how it goes.
>
> 0-DAY kernel testing has already reported few issues on blackfin, ia64 and
> x86 with xen.
>
My build is still going on, but I can already see additional failures on
http://server.roeck-us.net:8010/builders (c6x, m68k, microblaze, ppc).
Guenter
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
@ 2015-01-30 20:41 ` Guenter Roeck
0 siblings, 0 replies; 93+ messages in thread
From: Guenter Roeck @ 2015-01-30 20:41 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel
On Fri, Jan 30, 2015 at 10:09:56PM +0200, Kirill A. Shutemov wrote:
> On Fri, Jan 30, 2015 at 11:14:35AM -0800, Guenter Roeck wrote:
> > On Fri, Jan 30, 2015 at 08:50:52PM +0200, Kirill A. Shutemov wrote:
> > > On Fri, Jan 30, 2015 at 09:26:13AM -0800, Guenter Roeck wrote:
> > > > On Fri, Jan 30, 2015 at 04:43:09PM +0200, Kirill A. Shutemov wrote:
> > > > > I've failed my attempt on split up mm_struct into separate header file to
> > > > > be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
> > > > > too much breakage and requires massive de-inlining of some architectures
> > > > > (notably ARM and S390 with PGSTE).
> > > > >
> > > > > This is other approach: expose number of page table levels on Kconfig
> > > > > level and use it to get rid of nr_pmds in mm_struct.
> > > > >
> > > > Hi Kirill,
> > > >
> > > > Can I pull this series from somewhere ?
> > >
> > > Just pushed:
> > >
> > > git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git config_pgtable_levels
> > >
> >
> > Great. Pushed into my 'testing' branch. I'll let you know how it goes.
>
> 0-DAY kernel testing has already reported few issues on blackfin, ia64 and
> x86 with xen.
>
My build is still going on, but I can already see additional failures on
http://server.roeck-us.net:8010/builders (c6x, m68k, microblaze, ppc).
Guenter
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
2015-01-30 20:09 ` Kirill A. Shutemov
@ 2015-01-30 20:59 ` Guenter Roeck
-1 siblings, 0 replies; 93+ messages in thread
From: Guenter Roeck @ 2015-01-30 20:59 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel
On Fri, Jan 30, 2015 at 10:09:56PM +0200, Kirill A. Shutemov wrote:
> On Fri, Jan 30, 2015 at 11:14:35AM -0800, Guenter Roeck wrote:
> > On Fri, Jan 30, 2015 at 08:50:52PM +0200, Kirill A. Shutemov wrote:
> > > On Fri, Jan 30, 2015 at 09:26:13AM -0800, Guenter Roeck wrote:
> > > > On Fri, Jan 30, 2015 at 04:43:09PM +0200, Kirill A. Shutemov wrote:
> > > > > I've failed my attempt on split up mm_struct into separate header file to
> > > > > be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
> > > > > too much breakage and requires massive de-inlining of some architectures
> > > > > (notably ARM and S390 with PGSTE).
> > > > >
> > > > > This is other approach: expose number of page table levels on Kconfig
> > > > > level and use it to get rid of nr_pmds in mm_struct.
> > > > >
> > > > Hi Kirill,
> > > >
> > > > Can I pull this series from somewhere ?
> > >
> > > Just pushed:
> > >
> > > git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git config_pgtable_levels
> > >
> >
> > Great. Pushed into my 'testing' branch. I'll let you know how it goes.
>
> 0-DAY kernel testing has already reported few issues on blackfin, ia64 and
> x86 with xen.
>
Here is the final verdict:
total: 134 pass: 114 fail: 20
Failed builds:
arc:defconfig (inherited from mainline)
arc:tb10x_defconfig (inherited from mainline)
arm:efm32_defconfig
blackfin:defconfig
c6x:dsk6455_defconfig
c6x:evmc6457_defconfig
c6x:evmc6678_defconfig
ia64:defconfig
m68k:m5272c3_defconfig
m68k:m5307c3_defconfig
m68k:m5249evb_defconfig
m68k:m5407c3_defconfig
microblaze:nommu_defconfig
mips:allmodconfig (inherited from -next)
powerpc:cell_defconfig (binutils 2.23)
powerpc:cell_defconfig (binutils 2.24)
sparc64:allmodconfig (inherited from -next)
x86_64:allyesconfig
x86_64:allmodconfig
xtensa:allmodconfig (inherited from -next)
There are also qemu warnings for arm, but those are inherited from -next.
Good start overall ...
Guenter
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
@ 2015-01-30 20:59 ` Guenter Roeck
0 siblings, 0 replies; 93+ messages in thread
From: Guenter Roeck @ 2015-01-30 20:59 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel
On Fri, Jan 30, 2015 at 10:09:56PM +0200, Kirill A. Shutemov wrote:
> On Fri, Jan 30, 2015 at 11:14:35AM -0800, Guenter Roeck wrote:
> > On Fri, Jan 30, 2015 at 08:50:52PM +0200, Kirill A. Shutemov wrote:
> > > On Fri, Jan 30, 2015 at 09:26:13AM -0800, Guenter Roeck wrote:
> > > > On Fri, Jan 30, 2015 at 04:43:09PM +0200, Kirill A. Shutemov wrote:
> > > > > I've failed my attempt on split up mm_struct into separate header file to
> > > > > be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
> > > > > too much breakage and requires massive de-inlining of some architectures
> > > > > (notably ARM and S390 with PGSTE).
> > > > >
> > > > > This is other approach: expose number of page table levels on Kconfig
> > > > > level and use it to get rid of nr_pmds in mm_struct.
> > > > >
> > > > Hi Kirill,
> > > >
> > > > Can I pull this series from somewhere ?
> > >
> > > Just pushed:
> > >
> > > git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git config_pgtable_levels
> > >
> >
> > Great. Pushed into my 'testing' branch. I'll let you know how it goes.
>
> 0-DAY kernel testing has already reported few issues on blackfin, ia64 and
> x86 with xen.
>
Here is the final verdict:
total: 134 pass: 114 fail: 20
Failed builds:
arc:defconfig (inherited from mainline)
arc:tb10x_defconfig (inherited from mainline)
arm:efm32_defconfig
blackfin:defconfig
c6x:dsk6455_defconfig
c6x:evmc6457_defconfig
c6x:evmc6678_defconfig
ia64:defconfig
m68k:m5272c3_defconfig
m68k:m5307c3_defconfig
m68k:m5249evb_defconfig
m68k:m5407c3_defconfig
microblaze:nommu_defconfig
mips:allmodconfig (inherited from -next)
powerpc:cell_defconfig (binutils 2.23)
powerpc:cell_defconfig (binutils 2.24)
sparc64:allmodconfig (inherited from -next)
x86_64:allyesconfig
x86_64:allmodconfig
xtensa:allmodconfig (inherited from -next)
There are also qemu warnings for arm, but those are inherited from -next.
Good start overall ...
Guenter
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
2015-01-30 20:59 ` Guenter Roeck
@ 2015-01-31 0:11 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-31 0:11 UTC (permalink / raw)
To: Guenter Roeck; +Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel
On Fri, Jan 30, 2015 at 12:59:58PM -0800, Guenter Roeck wrote:
> On Fri, Jan 30, 2015 at 10:09:56PM +0200, Kirill A. Shutemov wrote:
> > On Fri, Jan 30, 2015 at 11:14:35AM -0800, Guenter Roeck wrote:
> > > On Fri, Jan 30, 2015 at 08:50:52PM +0200, Kirill A. Shutemov wrote:
> > > > On Fri, Jan 30, 2015 at 09:26:13AM -0800, Guenter Roeck wrote:
> > > > > On Fri, Jan 30, 2015 at 04:43:09PM +0200, Kirill A. Shutemov wrote:
> > > > > > I've failed my attempt on split up mm_struct into separate header file to
> > > > > > be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
> > > > > > too much breakage and requires massive de-inlining of some architectures
> > > > > > (notably ARM and S390 with PGSTE).
> > > > > >
> > > > > > This is other approach: expose number of page table levels on Kconfig
> > > > > > level and use it to get rid of nr_pmds in mm_struct.
> > > > > >
> > > > > Hi Kirill,
> > > > >
> > > > > Can I pull this series from somewhere ?
> > > >
> > > > Just pushed:
> > > >
> > > > git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git config_pgtable_levels
> > > >
> > >
> > > Great. Pushed into my 'testing' branch. I'll let you know how it goes.
> >
> > 0-DAY kernel testing has already reported few issues on blackfin, ia64 and
> > x86 with xen.
> >
> Here is the final verdict:
> total: 134 pass: 114 fail: 20
> Failed builds:
> arc:defconfig (inherited from mainline)
> arc:tb10x_defconfig (inherited from mainline)
> arm:efm32_defconfig
> blackfin:defconfig
> c6x:dsk6455_defconfig
> c6x:evmc6457_defconfig
> c6x:evmc6678_defconfig
> ia64:defconfig
> m68k:m5272c3_defconfig
> m68k:m5307c3_defconfig
> m68k:m5249evb_defconfig
> m68k:m5407c3_defconfig
> microblaze:nommu_defconfig
> mips:allmodconfig (inherited from -next)
> powerpc:cell_defconfig (binutils 2.23)
> powerpc:cell_defconfig (binutils 2.24)
> sparc64:allmodconfig (inherited from -next)
> x86_64:allyesconfig
> x86_64:allmodconfig
> xtensa:allmodconfig (inherited from -next)
The patch below should fix all regressions from -next.
Please test.
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 56313dfd9685..4f9a6661491b 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -1,7 +1,7 @@
config PGTABLE_LEVELS
int "Page Table Levels" if !IA64_PAGE_SIZE_64KB
range 3 4 if !IA64_PAGE_SIZE_64KB
- default 4
+ default 3
source "init/Kconfig"
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 4c0c744fa297..91ad76f30d18 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -300,7 +300,7 @@ config ZONE_DMA32
config PGTABLE_LEVELS
int
default 2 if !PPC64
- default 3 if 64K_PAGES
+ default 3 if PPC_64K_PAGES
default 4
source "init/Kconfig"
diff --git a/include/linux/mm.h b/include/linux/mm.h
index d782617c11de..a09837f3f4b7 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1454,13 +1454,15 @@ static inline int __pud_alloc(struct mm_struct *mm, pgd_t *pgd,
int __pud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address);
#endif
-#ifdef __PAGETABLE_PMD_FOLDED
+#if defined(__PAGETABLE_PMD_FOLDED) || !defined(CONFIG_MMU)
static inline int __pmd_alloc(struct mm_struct *mm, pud_t *pud,
unsigned long address)
{
return 0;
}
+static inline void mm_nr_pmds_init(struct mm_struct *mm) {}
+
static inline unsigned long mm_nr_pmds(struct mm_struct *mm)
{
return 0;
@@ -1472,6 +1474,11 @@ static inline void mm_dec_nr_pmds(struct mm_struct *mm) {}
#else
int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address);
+static inline void mm_nr_pmds_init(struct mm_struct *mm)
+{
+ atomic_long_set(&mm->nr_pmds, 0);
+}
+
static inline unsigned long mm_nr_pmds(struct mm_struct *mm)
{
return atomic_long_read(&mm->nr_pmds);
diff --git a/include/trace/events/xen.h b/include/trace/events/xen.h
index d06b6da5c1e3..bce990f5a35d 100644
--- a/include/trace/events/xen.h
+++ b/include/trace/events/xen.h
@@ -224,7 +224,7 @@ TRACE_EVENT(xen_mmu_pmd_clear,
TP_printk("pmdp %p", __entry->pmdp)
);
-#if PAGETABLE_LEVELS >= 4
+#if CONFIG_PGTABLE_LEVELS >= 4
TRACE_EVENT(xen_mmu_set_pud,
TP_PROTO(pud_t *pudp, pud_t pudval),
diff --git a/kernel/fork.c b/kernel/fork.c
index 76d6f292274c..56b82deb6457 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -555,9 +555,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p)
INIT_LIST_HEAD(&mm->mmlist);
mm->core_state = NULL;
atomic_long_set(&mm->nr_ptes, 0);
-#ifndef __PAGETABLE_PMD_FOLDED
- atomic_long_set(&mm->nr_pmds, 0);
-#endif
+ mm_nr_pmds_init(mm);
mm->map_count = 0;
mm->locked_vm = 0;
mm->pinned_vm = 0;
--
Kirill A. Shutemov
^ permalink raw reply related [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
@ 2015-01-31 0:11 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-31 0:11 UTC (permalink / raw)
To: Guenter Roeck; +Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel
On Fri, Jan 30, 2015 at 12:59:58PM -0800, Guenter Roeck wrote:
> On Fri, Jan 30, 2015 at 10:09:56PM +0200, Kirill A. Shutemov wrote:
> > On Fri, Jan 30, 2015 at 11:14:35AM -0800, Guenter Roeck wrote:
> > > On Fri, Jan 30, 2015 at 08:50:52PM +0200, Kirill A. Shutemov wrote:
> > > > On Fri, Jan 30, 2015 at 09:26:13AM -0800, Guenter Roeck wrote:
> > > > > On Fri, Jan 30, 2015 at 04:43:09PM +0200, Kirill A. Shutemov wrote:
> > > > > > I've failed my attempt on split up mm_struct into separate header file to
> > > > > > be able to use defines from <asm/pgtable.h> to define mm_struct: it causes
> > > > > > too much breakage and requires massive de-inlining of some architectures
> > > > > > (notably ARM and S390 with PGSTE).
> > > > > >
> > > > > > This is other approach: expose number of page table levels on Kconfig
> > > > > > level and use it to get rid of nr_pmds in mm_struct.
> > > > > >
> > > > > Hi Kirill,
> > > > >
> > > > > Can I pull this series from somewhere ?
> > > >
> > > > Just pushed:
> > > >
> > > > git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git config_pgtable_levels
> > > >
> > >
> > > Great. Pushed into my 'testing' branch. I'll let you know how it goes.
> >
> > 0-DAY kernel testing has already reported few issues on blackfin, ia64 and
> > x86 with xen.
> >
> Here is the final verdict:
> total: 134 pass: 114 fail: 20
> Failed builds:
> arc:defconfig (inherited from mainline)
> arc:tb10x_defconfig (inherited from mainline)
> arm:efm32_defconfig
> blackfin:defconfig
> c6x:dsk6455_defconfig
> c6x:evmc6457_defconfig
> c6x:evmc6678_defconfig
> ia64:defconfig
> m68k:m5272c3_defconfig
> m68k:m5307c3_defconfig
> m68k:m5249evb_defconfig
> m68k:m5407c3_defconfig
> microblaze:nommu_defconfig
> mips:allmodconfig (inherited from -next)
> powerpc:cell_defconfig (binutils 2.23)
> powerpc:cell_defconfig (binutils 2.24)
> sparc64:allmodconfig (inherited from -next)
> x86_64:allyesconfig
> x86_64:allmodconfig
> xtensa:allmodconfig (inherited from -next)
The patch below should fix all regressions from -next.
Please test.
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 56313dfd9685..4f9a6661491b 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -1,7 +1,7 @@
config PGTABLE_LEVELS
int "Page Table Levels" if !IA64_PAGE_SIZE_64KB
range 3 4 if !IA64_PAGE_SIZE_64KB
- default 4
+ default 3
source "init/Kconfig"
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 4c0c744fa297..91ad76f30d18 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -300,7 +300,7 @@ config ZONE_DMA32
config PGTABLE_LEVELS
int
default 2 if !PPC64
- default 3 if 64K_PAGES
+ default 3 if PPC_64K_PAGES
default 4
source "init/Kconfig"
diff --git a/include/linux/mm.h b/include/linux/mm.h
index d782617c11de..a09837f3f4b7 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1454,13 +1454,15 @@ static inline int __pud_alloc(struct mm_struct *mm, pgd_t *pgd,
int __pud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address);
#endif
-#ifdef __PAGETABLE_PMD_FOLDED
+#if defined(__PAGETABLE_PMD_FOLDED) || !defined(CONFIG_MMU)
static inline int __pmd_alloc(struct mm_struct *mm, pud_t *pud,
unsigned long address)
{
return 0;
}
+static inline void mm_nr_pmds_init(struct mm_struct *mm) {}
+
static inline unsigned long mm_nr_pmds(struct mm_struct *mm)
{
return 0;
@@ -1472,6 +1474,11 @@ static inline void mm_dec_nr_pmds(struct mm_struct *mm) {}
#else
int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address);
+static inline void mm_nr_pmds_init(struct mm_struct *mm)
+{
+ atomic_long_set(&mm->nr_pmds, 0);
+}
+
static inline unsigned long mm_nr_pmds(struct mm_struct *mm)
{
return atomic_long_read(&mm->nr_pmds);
diff --git a/include/trace/events/xen.h b/include/trace/events/xen.h
index d06b6da5c1e3..bce990f5a35d 100644
--- a/include/trace/events/xen.h
+++ b/include/trace/events/xen.h
@@ -224,7 +224,7 @@ TRACE_EVENT(xen_mmu_pmd_clear,
TP_printk("pmdp %p", __entry->pmdp)
);
-#if PAGETABLE_LEVELS >= 4
+#if CONFIG_PGTABLE_LEVELS >= 4
TRACE_EVENT(xen_mmu_set_pud,
TP_PROTO(pud_t *pudp, pud_t pudval),
diff --git a/kernel/fork.c b/kernel/fork.c
index 76d6f292274c..56b82deb6457 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -555,9 +555,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p)
INIT_LIST_HEAD(&mm->mmlist);
mm->core_state = NULL;
atomic_long_set(&mm->nr_ptes, 0);
-#ifndef __PAGETABLE_PMD_FOLDED
- atomic_long_set(&mm->nr_pmds, 0);
-#endif
+ mm_nr_pmds_init(mm);
mm->map_count = 0;
mm->locked_vm = 0;
mm->pinned_vm = 0;
--
Kirill A. Shutemov
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCHv2 05/19] ia64: expose number of page table levels on Kconfig level
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-31 0:17 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-31 0:17 UTC (permalink / raw)
To: Martin Schwidefsky, Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Tony Luck, Fenghua Yu
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
We need to define PGTABLE_LEVELS before sourcing init/Kconfig:
arch/Kconfig will define default value and it's sourced from init/Kconfig.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
---
v2: fix default for IA64_PAGE_SIZE_64KB
---
arch/ia64/Kconfig | 18 +++++-------------
arch/ia64/include/asm/page.h | 4 ++--
arch/ia64/include/asm/pgalloc.h | 4 ++--
arch/ia64/include/asm/pgtable.h | 12 ++++++------
arch/ia64/kernel/ivt.S | 12 ++++++------
arch/ia64/kernel/machine_kexec.c | 4 ++--
6 files changed, 23 insertions(+), 31 deletions(-)
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 074e52bf815c..4f9a6661491b 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -1,3 +1,8 @@
+config PGTABLE_LEVELS
+ int "Page Table Levels" if !IA64_PAGE_SIZE_64KB
+ range 3 4 if !IA64_PAGE_SIZE_64KB
+ default 3
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
@@ -286,19 +291,6 @@ config IA64_PAGE_SIZE_64KB
endchoice
-choice
- prompt "Page Table Levels"
- default PGTABLE_3
-
-config PGTABLE_3
- bool "3 Levels"
-
-config PGTABLE_4
- depends on !IA64_PAGE_SIZE_64KB
- bool "4 Levels"
-
-endchoice
-
if IA64_HP_SIM
config HZ
default 32
diff --git a/arch/ia64/include/asm/page.h b/arch/ia64/include/asm/page.h
index 1f1bf144fe62..ec48bb9f95e1 100644
--- a/arch/ia64/include/asm/page.h
+++ b/arch/ia64/include/asm/page.h
@@ -173,7 +173,7 @@ get_order (unsigned long size)
*/
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pmd; } pmd_t;
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
typedef struct { unsigned long pud; } pud_t;
#endif
typedef struct { unsigned long pgd; } pgd_t;
@@ -182,7 +182,7 @@ get_order (unsigned long size)
# define pte_val(x) ((x).pte)
# define pmd_val(x) ((x).pmd)
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
# define pud_val(x) ((x).pud)
#endif
# define pgd_val(x) ((x).pgd)
diff --git a/arch/ia64/include/asm/pgalloc.h b/arch/ia64/include/asm/pgalloc.h
index 5767cdfc08db..f5e70e961948 100644
--- a/arch/ia64/include/asm/pgalloc.h
+++ b/arch/ia64/include/asm/pgalloc.h
@@ -32,7 +32,7 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
quicklist_free(0, NULL, pgd);
}
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
static inline void
pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
{
@@ -49,7 +49,7 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
quicklist_free(0, NULL, pud);
}
#define __pud_free_tlb(tlb, pud, address) pud_free((tlb)->mm, pud)
-#endif /* CONFIG_PGTABLE_4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
static inline void
pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h
index 7b6f8801df57..9f3ed9ee8f13 100644
--- a/arch/ia64/include/asm/pgtable.h
+++ b/arch/ia64/include/asm/pgtable.h
@@ -99,7 +99,7 @@
#define PMD_MASK (~(PMD_SIZE-1))
#define PTRS_PER_PMD (1UL << (PTRS_PER_PTD_SHIFT))
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
/*
* Definitions for second level:
*
@@ -117,7 +117,7 @@
*
* PGDIR_SHIFT determines what a first-level page table entry can map.
*/
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
#define PGDIR_SHIFT (PUD_SHIFT + (PTRS_PER_PTD_SHIFT))
#else
#define PGDIR_SHIFT (PMD_SHIFT + (PTRS_PER_PTD_SHIFT))
@@ -180,7 +180,7 @@
#define __S111 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RWX)
#define pgd_ERROR(e) printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e))
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
#define pud_ERROR(e) printk("%s:%d: bad pud %016lx.\n", __FILE__, __LINE__, pud_val(e))
#endif
#define pmd_ERROR(e) printk("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
@@ -281,7 +281,7 @@ extern unsigned long VMALLOC_END;
#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & _PFN_MASK))
#define pud_page(pud) virt_to_page((pud_val(pud) + PAGE_OFFSET))
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
#define pgd_none(pgd) (!pgd_val(pgd))
#define pgd_bad(pgd) (!ia64_phys_addr_valid(pgd_val(pgd)))
#define pgd_present(pgd) (pgd_val(pgd) != 0UL)
@@ -384,7 +384,7 @@ pgd_offset (const struct mm_struct *mm, unsigned long address)
here. */
#define pgd_offset_gate(mm, addr) pgd_offset_k(addr)
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
/* Find an entry in the second-level page table.. */
#define pud_offset(dir,addr) \
((pud_t *) pgd_page_vaddr(*(dir)) + (((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1)))
@@ -586,7 +586,7 @@ extern struct page *zero_page_memmap_ptr;
#define __HAVE_ARCH_PGD_OFFSET_GATE
-#ifndef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 3
#include <asm-generic/pgtable-nopud.h>
#endif
#include <asm-generic/pgtable.h>
diff --git a/arch/ia64/kernel/ivt.S b/arch/ia64/kernel/ivt.S
index 18e794a57248..e42bf7a913f3 100644
--- a/arch/ia64/kernel/ivt.S
+++ b/arch/ia64/kernel/ivt.S
@@ -146,7 +146,7 @@ ENTRY(vhpt_miss)
(p6) dep r17=r18,r19,3,(PAGE_SHIFT-3) // r17=pgd_offset for region 5
(p7) dep r17=r18,r17,3,(PAGE_SHIFT-6) // r17=pgd_offset for region[0-4]
cmp.eq p7,p6=0,r21 // unused address bits all zeroes?
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
shr.u r28=r22,PUD_SHIFT // shift pud index into position
#else
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
@@ -155,7 +155,7 @@ ENTRY(vhpt_miss)
ld8 r17=[r17] // get *pgd (may be 0)
;;
(p7) cmp.eq p6,p7=r17,r0 // was pgd_present(*pgd) == NULL?
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
dep r28=r28,r17,3,(PAGE_SHIFT-3) // r28=pud_offset(pgd,addr)
;;
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
@@ -222,13 +222,13 @@ ENTRY(vhpt_miss)
*/
ld8 r25=[r21] // read *pte again
ld8 r26=[r17] // read *pmd again
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
ld8 r19=[r28] // read *pud again
#endif
cmp.ne p6,p7=r0,r0
;;
cmp.ne.or.andcm p6,p7=r26,r20 // did *pmd change
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
cmp.ne.or.andcm p6,p7=r19,r29 // did *pud change
#endif
mov r27=PAGE_SHIFT<<2
@@ -476,7 +476,7 @@ ENTRY(nested_dtlb_miss)
(p6) dep r17=r18,r19,3,(PAGE_SHIFT-3) // r17=pgd_offset for region 5
(p7) dep r17=r18,r17,3,(PAGE_SHIFT-6) // r17=pgd_offset for region[0-4]
cmp.eq p7,p6=0,r21 // unused address bits all zeroes?
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
shr.u r18=r22,PUD_SHIFT // shift pud index into position
#else
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
@@ -487,7 +487,7 @@ ENTRY(nested_dtlb_miss)
(p7) cmp.eq p6,p7=r17,r0 // was pgd_present(*pgd) == NULL?
dep r17=r18,r17,3,(PAGE_SHIFT-3) // r17=p[u|m]d_offset(pgd,addr)
;;
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
(p7) ld8 r17=[r17] // get *pud (may be 0)
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
;;
diff --git a/arch/ia64/kernel/machine_kexec.c b/arch/ia64/kernel/machine_kexec.c
index 5151a649c96b..b72cd7a07222 100644
--- a/arch/ia64/kernel/machine_kexec.c
+++ b/arch/ia64/kernel/machine_kexec.c
@@ -156,9 +156,9 @@ void arch_crash_save_vmcoreinfo(void)
VMCOREINFO_OFFSET(node_memblk_s, start_paddr);
VMCOREINFO_OFFSET(node_memblk_s, size);
#endif
-#ifdef CONFIG_PGTABLE_3
+#if CONFIG_PGTABLE_LEVELS == 3
VMCOREINFO_CONFIG(PGTABLE_3);
-#elif defined(CONFIG_PGTABLE_4)
+#elif CONFIG_PGTABLE_LEVELS == 4
VMCOREINFO_CONFIG(PGTABLE_4);
#endif
}
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCHv2 05/19] ia64: expose number of page table levels on Kconfig level
@ 2015-01-31 0:17 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-31 0:17 UTC (permalink / raw)
To: Martin Schwidefsky, Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Tony Luck, Fenghua Yu
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
We need to define PGTABLE_LEVELS before sourcing init/Kconfig:
arch/Kconfig will define default value and it's sourced from init/Kconfig.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
---
v2: fix default for IA64_PAGE_SIZE_64KB
---
arch/ia64/Kconfig | 18 +++++-------------
arch/ia64/include/asm/page.h | 4 ++--
arch/ia64/include/asm/pgalloc.h | 4 ++--
arch/ia64/include/asm/pgtable.h | 12 ++++++------
arch/ia64/kernel/ivt.S | 12 ++++++------
arch/ia64/kernel/machine_kexec.c | 4 ++--
6 files changed, 23 insertions(+), 31 deletions(-)
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 074e52bf815c..4f9a6661491b 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -1,3 +1,8 @@
+config PGTABLE_LEVELS
+ int "Page Table Levels" if !IA64_PAGE_SIZE_64KB
+ range 3 4 if !IA64_PAGE_SIZE_64KB
+ default 3
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
@@ -286,19 +291,6 @@ config IA64_PAGE_SIZE_64KB
endchoice
-choice
- prompt "Page Table Levels"
- default PGTABLE_3
-
-config PGTABLE_3
- bool "3 Levels"
-
-config PGTABLE_4
- depends on !IA64_PAGE_SIZE_64KB
- bool "4 Levels"
-
-endchoice
-
if IA64_HP_SIM
config HZ
default 32
diff --git a/arch/ia64/include/asm/page.h b/arch/ia64/include/asm/page.h
index 1f1bf144fe62..ec48bb9f95e1 100644
--- a/arch/ia64/include/asm/page.h
+++ b/arch/ia64/include/asm/page.h
@@ -173,7 +173,7 @@ get_order (unsigned long size)
*/
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pmd; } pmd_t;
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
typedef struct { unsigned long pud; } pud_t;
#endif
typedef struct { unsigned long pgd; } pgd_t;
@@ -182,7 +182,7 @@ get_order (unsigned long size)
# define pte_val(x) ((x).pte)
# define pmd_val(x) ((x).pmd)
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
# define pud_val(x) ((x).pud)
#endif
# define pgd_val(x) ((x).pgd)
diff --git a/arch/ia64/include/asm/pgalloc.h b/arch/ia64/include/asm/pgalloc.h
index 5767cdfc08db..f5e70e961948 100644
--- a/arch/ia64/include/asm/pgalloc.h
+++ b/arch/ia64/include/asm/pgalloc.h
@@ -32,7 +32,7 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
quicklist_free(0, NULL, pgd);
}
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
static inline void
pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
{
@@ -49,7 +49,7 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
quicklist_free(0, NULL, pud);
}
#define __pud_free_tlb(tlb, pud, address) pud_free((tlb)->mm, pud)
-#endif /* CONFIG_PGTABLE_4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
static inline void
pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h
index 7b6f8801df57..9f3ed9ee8f13 100644
--- a/arch/ia64/include/asm/pgtable.h
+++ b/arch/ia64/include/asm/pgtable.h
@@ -99,7 +99,7 @@
#define PMD_MASK (~(PMD_SIZE-1))
#define PTRS_PER_PMD (1UL << (PTRS_PER_PTD_SHIFT))
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
/*
* Definitions for second level:
*
@@ -117,7 +117,7 @@
*
* PGDIR_SHIFT determines what a first-level page table entry can map.
*/
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
#define PGDIR_SHIFT (PUD_SHIFT + (PTRS_PER_PTD_SHIFT))
#else
#define PGDIR_SHIFT (PMD_SHIFT + (PTRS_PER_PTD_SHIFT))
@@ -180,7 +180,7 @@
#define __S111 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RWX)
#define pgd_ERROR(e) printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e))
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
#define pud_ERROR(e) printk("%s:%d: bad pud %016lx.\n", __FILE__, __LINE__, pud_val(e))
#endif
#define pmd_ERROR(e) printk("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
@@ -281,7 +281,7 @@ extern unsigned long VMALLOC_END;
#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & _PFN_MASK))
#define pud_page(pud) virt_to_page((pud_val(pud) + PAGE_OFFSET))
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
#define pgd_none(pgd) (!pgd_val(pgd))
#define pgd_bad(pgd) (!ia64_phys_addr_valid(pgd_val(pgd)))
#define pgd_present(pgd) (pgd_val(pgd) != 0UL)
@@ -384,7 +384,7 @@ pgd_offset (const struct mm_struct *mm, unsigned long address)
here. */
#define pgd_offset_gate(mm, addr) pgd_offset_k(addr)
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
/* Find an entry in the second-level page table.. */
#define pud_offset(dir,addr) \
((pud_t *) pgd_page_vaddr(*(dir)) + (((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1)))
@@ -586,7 +586,7 @@ extern struct page *zero_page_memmap_ptr;
#define __HAVE_ARCH_PGD_OFFSET_GATE
-#ifndef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 3
#include <asm-generic/pgtable-nopud.h>
#endif
#include <asm-generic/pgtable.h>
diff --git a/arch/ia64/kernel/ivt.S b/arch/ia64/kernel/ivt.S
index 18e794a57248..e42bf7a913f3 100644
--- a/arch/ia64/kernel/ivt.S
+++ b/arch/ia64/kernel/ivt.S
@@ -146,7 +146,7 @@ ENTRY(vhpt_miss)
(p6) dep r17=r18,r19,3,(PAGE_SHIFT-3) // r17=pgd_offset for region 5
(p7) dep r17=r18,r17,3,(PAGE_SHIFT-6) // r17=pgd_offset for region[0-4]
cmp.eq p7,p6=0,r21 // unused address bits all zeroes?
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
shr.u r28=r22,PUD_SHIFT // shift pud index into position
#else
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
@@ -155,7 +155,7 @@ ENTRY(vhpt_miss)
ld8 r17=[r17] // get *pgd (may be 0)
;;
(p7) cmp.eq p6,p7=r17,r0 // was pgd_present(*pgd) == NULL?
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
dep r28=r28,r17,3,(PAGE_SHIFT-3) // r28=pud_offset(pgd,addr)
;;
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
@@ -222,13 +222,13 @@ ENTRY(vhpt_miss)
*/
ld8 r25=[r21] // read *pte again
ld8 r26=[r17] // read *pmd again
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
ld8 r19=[r28] // read *pud again
#endif
cmp.ne p6,p7=r0,r0
;;
cmp.ne.or.andcm p6,p7=r26,r20 // did *pmd change
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
cmp.ne.or.andcm p6,p7=r19,r29 // did *pud change
#endif
mov r27=PAGE_SHIFT<<2
@@ -476,7 +476,7 @@ ENTRY(nested_dtlb_miss)
(p6) dep r17=r18,r19,3,(PAGE_SHIFT-3) // r17=pgd_offset for region 5
(p7) dep r17=r18,r17,3,(PAGE_SHIFT-6) // r17=pgd_offset for region[0-4]
cmp.eq p7,p6=0,r21 // unused address bits all zeroes?
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
shr.u r18=r22,PUD_SHIFT // shift pud index into position
#else
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
@@ -487,7 +487,7 @@ ENTRY(nested_dtlb_miss)
(p7) cmp.eq p6,p7=r17,r0 // was pgd_present(*pgd) == NULL?
dep r17=r18,r17,3,(PAGE_SHIFT-3) // r17=p[u|m]d_offset(pgd,addr)
;;
-#ifdef CONFIG_PGTABLE_4
+#if CONFIG_PGTABLE_LEVELS == 4
(p7) ld8 r17=[r17] // get *pud (may be 0)
shr.u r18=r22,PMD_SHIFT // shift pmd index into position
;;
diff --git a/arch/ia64/kernel/machine_kexec.c b/arch/ia64/kernel/machine_kexec.c
index 5151a649c96b..b72cd7a07222 100644
--- a/arch/ia64/kernel/machine_kexec.c
+++ b/arch/ia64/kernel/machine_kexec.c
@@ -156,9 +156,9 @@ void arch_crash_save_vmcoreinfo(void)
VMCOREINFO_OFFSET(node_memblk_s, start_paddr);
VMCOREINFO_OFFSET(node_memblk_s, size);
#endif
-#ifdef CONFIG_PGTABLE_3
+#if CONFIG_PGTABLE_LEVELS == 3
VMCOREINFO_CONFIG(PGTABLE_3);
-#elif defined(CONFIG_PGTABLE_4)
+#elif CONFIG_PGTABLE_LEVELS == 4
VMCOREINFO_CONFIG(PGTABLE_4);
#endif
}
--
2.1.4
--
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCHv2 11/19] powerpc: expose number of page table levels on Kconfig level
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-31 0:27 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-31 0:27 UTC (permalink / raw)
To: Martin Schwidefsky, Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Benjamin Herrenschmidt, Paul Mackerras, Michael Ellerman
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
---
v2: s/64K_PAGES/PPC_64K_PAGES/
---
arch/powerpc/Kconfig | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 22b0940494bb..91ad76f30d18 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -297,6 +297,12 @@ config ZONE_DMA32
bool
default y if PPC64
+config PGTABLE_LEVELS
+ int
+ default 2 if !PPC64
+ default 3 if PPC_64K_PAGES
+ default 4
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCHv2 11/19] powerpc: expose number of page table levels on Kconfig level
@ 2015-01-31 0:27 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-31 0:27 UTC (permalink / raw)
To: Martin Schwidefsky, Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Benjamin Herrenschmidt, Paul Mackerras, Michael Ellerman
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
---
v2: s/64K_PAGES/PPC_64K_PAGES/
---
arch/powerpc/Kconfig | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 22b0940494bb..91ad76f30d18 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -297,6 +297,12 @@ config ZONE_DMA32
bool
default y if PPC64
+config PGTABLE_LEVELS
+ int
+ default 2 if !PPC64
+ default 3 if PPC_64K_PAGES
+ default 4
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
--
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the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCHv2 17/19] x86: expose number of page table levels on Kconfig level
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-31 0:30 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-31 0:30 UTC (permalink / raw)
To: Martin Schwidefsky, Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Thomas Gleixner, Ingo Molnar, H. Peter Anvin
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
---
v2: s/PAGETABLE_LEVELS/CONFIG_PGTABLE_LEVELS/ include/trace/events/xen.h
---
arch/x86/Kconfig | 6 ++++++
arch/x86/include/asm/paravirt.h | 8 ++++----
arch/x86/include/asm/paravirt_types.h | 8 ++++----
arch/x86/include/asm/pgalloc.h | 8 ++++----
arch/x86/include/asm/pgtable-2level_types.h | 1 -
arch/x86/include/asm/pgtable-3level_types.h | 2 --
arch/x86/include/asm/pgtable.h | 8 ++++----
arch/x86/include/asm/pgtable_64_types.h | 1 -
arch/x86/include/asm/pgtable_types.h | 4 ++--
arch/x86/kernel/paravirt.c | 6 +++---
arch/x86/mm/pgtable.c | 14 +++++++-------
arch/x86/xen/mmu.c | 14 +++++++-------
include/trace/events/xen.h | 2 +-
13 files changed, 42 insertions(+), 40 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d34ef0852f41..ec1a161cb855 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -278,6 +278,12 @@ config ARCH_SUPPORTS_UPROBES
config FIX_EARLYCON_MEM
def_bool y
+config PGTABLE_LEVELS
+ int
+ default 4 if X86_64
+ default 3 if X86_PAE
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 32444ae939ca..7ced2aaab829 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -545,7 +545,7 @@ static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, val);
}
-#if PAGETABLE_LEVELS >= 3
+#if CONFIG_PGTABLE_LEVELS >= 3
static inline pmd_t __pmd(pmdval_t val)
{
pmdval_t ret;
@@ -585,7 +585,7 @@ static inline void set_pud(pud_t *pudp, pud_t pud)
PVOP_VCALL2(pv_mmu_ops.set_pud, pudp,
val);
}
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
static inline pud_t __pud(pudval_t val)
{
pudval_t ret;
@@ -636,9 +636,9 @@ static inline void pud_clear(pud_t *pudp)
set_pud(pudp, __pud(0));
}
-#endif /* PAGETABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
-#endif /* PAGETABLE_LEVELS >= 3 */
+#endif /* CONFIG_PGTABLE_LEVELS >= 3 */
#ifdef CONFIG_X86_PAE
/* Special-case pte-setting operations for PAE, which can't update a
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 7549b8b369e4..f7b0b5c112f2 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -294,7 +294,7 @@ struct pv_mmu_ops {
struct paravirt_callee_save pgd_val;
struct paravirt_callee_save make_pgd;
-#if PAGETABLE_LEVELS >= 3
+#if CONFIG_PGTABLE_LEVELS >= 3
#ifdef CONFIG_X86_PAE
void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
void (*pte_clear)(struct mm_struct *mm, unsigned long addr,
@@ -308,13 +308,13 @@ struct pv_mmu_ops {
struct paravirt_callee_save pmd_val;
struct paravirt_callee_save make_pmd;
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
struct paravirt_callee_save pud_val;
struct paravirt_callee_save make_pud;
void (*set_pgd)(pgd_t *pudp, pgd_t pgdval);
-#endif /* PAGETABLE_LEVELS == 4 */
-#endif /* PAGETABLE_LEVELS >= 3 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS >= 3 */
struct pv_lazy_ops lazy_mode;
diff --git a/arch/x86/include/asm/pgalloc.h b/arch/x86/include/asm/pgalloc.h
index c4412e972bbd..bf7f8b55b0f9 100644
--- a/arch/x86/include/asm/pgalloc.h
+++ b/arch/x86/include/asm/pgalloc.h
@@ -77,7 +77,7 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
#define pmd_pgtable(pmd) pmd_page(pmd)
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
struct page *page;
@@ -116,7 +116,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
}
#endif /* CONFIG_X86_PAE */
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
{
paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
@@ -142,7 +142,7 @@ static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
___pud_free_tlb(tlb, pud);
}
-#endif /* PAGETABLE_LEVELS > 3 */
-#endif /* PAGETABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
#endif /* _ASM_X86_PGALLOC_H */
diff --git a/arch/x86/include/asm/pgtable-2level_types.h b/arch/x86/include/asm/pgtable-2level_types.h
index daacc23e3fb9..392576433e77 100644
--- a/arch/x86/include/asm/pgtable-2level_types.h
+++ b/arch/x86/include/asm/pgtable-2level_types.h
@@ -17,7 +17,6 @@ typedef union {
#endif /* !__ASSEMBLY__ */
#define SHARED_KERNEL_PMD 0
-#define PAGETABLE_LEVELS 2
/*
* traditional i386 two-level paging structure:
diff --git a/arch/x86/include/asm/pgtable-3level_types.h b/arch/x86/include/asm/pgtable-3level_types.h
index 1bd5876c8649..bcc89625ebe5 100644
--- a/arch/x86/include/asm/pgtable-3level_types.h
+++ b/arch/x86/include/asm/pgtable-3level_types.h
@@ -24,8 +24,6 @@ typedef union {
#define SHARED_KERNEL_PMD 1
#endif
-#define PAGETABLE_LEVELS 3
-
/*
* PGDIR_SHIFT determines what a top-level page table entry can map
*/
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 9d0ade00923e..f89d6c9943ea 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -554,7 +554,7 @@ static inline unsigned long pages_to_mb(unsigned long npg)
return npg >> (20 - PAGE_SHIFT);
}
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
static inline int pud_none(pud_t pud)
{
return native_pud_val(pud) == 0;
@@ -597,9 +597,9 @@ static inline int pud_large(pud_t pud)
{
return 0;
}
-#endif /* PAGETABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
static inline int pgd_present(pgd_t pgd)
{
return pgd_flags(pgd) & _PAGE_PRESENT;
@@ -636,7 +636,7 @@ static inline int pgd_none(pgd_t pgd)
{
return !native_pgd_val(pgd);
}
-#endif /* PAGETABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
#endif /* __ASSEMBLY__ */
diff --git a/arch/x86/include/asm/pgtable_64_types.h b/arch/x86/include/asm/pgtable_64_types.h
index 602b6028c5b6..e6844dfb4471 100644
--- a/arch/x86/include/asm/pgtable_64_types.h
+++ b/arch/x86/include/asm/pgtable_64_types.h
@@ -20,7 +20,6 @@ typedef struct { pteval_t pte; } pte_t;
#endif /* !__ASSEMBLY__ */
#define SHARED_KERNEL_PMD 0
-#define PAGETABLE_LEVELS 4
/*
* PGDIR_SHIFT determines what a top-level page table entry can map
diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h
index 8c7c10802e9c..78f0c8cbe316 100644
--- a/arch/x86/include/asm/pgtable_types.h
+++ b/arch/x86/include/asm/pgtable_types.h
@@ -234,7 +234,7 @@ static inline pgdval_t pgd_flags(pgd_t pgd)
return native_pgd_val(pgd) & PTE_FLAGS_MASK;
}
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
typedef struct { pudval_t pud; } pud_t;
static inline pud_t native_make_pud(pmdval_t val)
@@ -255,7 +255,7 @@ static inline pudval_t native_pud_val(pud_t pud)
}
#endif
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
typedef struct { pmdval_t pmd; } pmd_t;
static inline pmd_t native_make_pmd(pmdval_t val)
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 548d25f00c90..c614dd492f5f 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -443,7 +443,7 @@ struct pv_mmu_ops pv_mmu_ops = {
.ptep_modify_prot_start = __ptep_modify_prot_start,
.ptep_modify_prot_commit = __ptep_modify_prot_commit,
-#if PAGETABLE_LEVELS >= 3
+#if CONFIG_PGTABLE_LEVELS >= 3
#ifdef CONFIG_X86_PAE
.set_pte_atomic = native_set_pte_atomic,
.pte_clear = native_pte_clear,
@@ -454,13 +454,13 @@ struct pv_mmu_ops pv_mmu_ops = {
.pmd_val = PTE_IDENT,
.make_pmd = PTE_IDENT,
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
.pud_val = PTE_IDENT,
.make_pud = PTE_IDENT,
.set_pgd = native_set_pgd,
#endif
-#endif /* PAGETABLE_LEVELS >= 3 */
+#endif /* CONFIG_PGTABLE_LEVELS >= 3 */
.pte_val = PTE_IDENT,
.pgd_val = PTE_IDENT,
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 7b22adaad4f1..9885592b9fa7 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -58,7 +58,7 @@ void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
tlb_remove_page(tlb, pte);
}
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
{
struct page *page = virt_to_page(pmd);
@@ -74,14 +74,14 @@ void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
tlb_remove_page(tlb, page);
}
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud)
{
paravirt_release_pud(__pa(pud) >> PAGE_SHIFT);
tlb_remove_page(tlb, virt_to_page(pud));
}
-#endif /* PAGETABLE_LEVELS > 3 */
-#endif /* PAGETABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
static inline void pgd_list_add(pgd_t *pgd)
{
@@ -117,9 +117,9 @@ static void pgd_ctor(struct mm_struct *mm, pgd_t *pgd)
/* If the pgd points to a shared pagetable level (either the
ptes in non-PAE, or shared PMD in PAE), then just copy the
references from swapper_pg_dir. */
- if (PAGETABLE_LEVELS == 2 ||
- (PAGETABLE_LEVELS == 3 && SHARED_KERNEL_PMD) ||
- PAGETABLE_LEVELS == 4) {
+ if (CONFIG_PGTABLE_LEVELS == 2 ||
+ (CONFIG_PGTABLE_LEVELS == 3 && SHARED_KERNEL_PMD) ||
+ CONFIG_PGTABLE_LEVELS == 4) {
clone_pgd_range(pgd + KERNEL_PGD_BOUNDARY,
swapper_pg_dir + KERNEL_PGD_BOUNDARY,
KERNEL_PGD_PTRS);
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index adca9e2b6553..65083ad63b6f 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -502,7 +502,7 @@ __visible pmd_t xen_make_pmd(pmdval_t pmd)
}
PV_CALLEE_SAVE_REGS_THUNK(xen_make_pmd);
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
__visible pudval_t xen_pud_val(pud_t pud)
{
return pte_mfn_to_pfn(pud.pud);
@@ -589,7 +589,7 @@ static void xen_set_pgd(pgd_t *ptr, pgd_t val)
xen_mc_issue(PARAVIRT_LAZY_MMU);
}
-#endif /* PAGETABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
/*
* (Yet another) pagetable walker. This one is intended for pinning a
@@ -1628,7 +1628,7 @@ static void xen_release_pmd(unsigned long pfn)
xen_release_ptpage(pfn, PT_PMD);
}
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
static void xen_alloc_pud(struct mm_struct *mm, unsigned long pfn)
{
xen_alloc_ptpage(mm, pfn, PT_PUD);
@@ -2046,7 +2046,7 @@ static void __init xen_post_allocator_init(void)
pv_mmu_ops.set_pte = xen_set_pte;
pv_mmu_ops.set_pmd = xen_set_pmd;
pv_mmu_ops.set_pud = xen_set_pud;
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
pv_mmu_ops.set_pgd = xen_set_pgd;
#endif
@@ -2056,7 +2056,7 @@ static void __init xen_post_allocator_init(void)
pv_mmu_ops.alloc_pmd = xen_alloc_pmd;
pv_mmu_ops.release_pte = xen_release_pte;
pv_mmu_ops.release_pmd = xen_release_pmd;
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
pv_mmu_ops.alloc_pud = xen_alloc_pud;
pv_mmu_ops.release_pud = xen_release_pud;
#endif
@@ -2122,14 +2122,14 @@ static const struct pv_mmu_ops xen_mmu_ops __initconst = {
.make_pmd = PV_CALLEE_SAVE(xen_make_pmd),
.pmd_val = PV_CALLEE_SAVE(xen_pmd_val),
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
.pud_val = PV_CALLEE_SAVE(xen_pud_val),
.make_pud = PV_CALLEE_SAVE(xen_make_pud),
.set_pgd = xen_set_pgd_hyper,
.alloc_pud = xen_alloc_pmd_init,
.release_pud = xen_release_pmd_init,
-#endif /* PAGETABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
.activate_mm = xen_activate_mm,
.dup_mmap = xen_dup_mmap,
diff --git a/include/trace/events/xen.h b/include/trace/events/xen.h
index d06b6da5c1e3..bce990f5a35d 100644
--- a/include/trace/events/xen.h
+++ b/include/trace/events/xen.h
@@ -224,7 +224,7 @@ TRACE_EVENT(xen_mmu_pmd_clear,
TP_printk("pmdp %p", __entry->pmdp)
);
-#if PAGETABLE_LEVELS >= 4
+#if CONFIG_PGTABLE_LEVELS >= 4
TRACE_EVENT(xen_mmu_set_pud,
TP_PROTO(pud_t *pudp, pud_t pudval),
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCHv2 17/19] x86: expose number of page table levels on Kconfig level
@ 2015-01-31 0:30 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-31 0:30 UTC (permalink / raw)
To: Martin Schwidefsky, Andrew Morton
Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov,
Thomas Gleixner, Ingo Molnar, H. Peter Anvin
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
---
v2: s/PAGETABLE_LEVELS/CONFIG_PGTABLE_LEVELS/ include/trace/events/xen.h
---
arch/x86/Kconfig | 6 ++++++
arch/x86/include/asm/paravirt.h | 8 ++++----
arch/x86/include/asm/paravirt_types.h | 8 ++++----
arch/x86/include/asm/pgalloc.h | 8 ++++----
arch/x86/include/asm/pgtable-2level_types.h | 1 -
arch/x86/include/asm/pgtable-3level_types.h | 2 --
arch/x86/include/asm/pgtable.h | 8 ++++----
arch/x86/include/asm/pgtable_64_types.h | 1 -
arch/x86/include/asm/pgtable_types.h | 4 ++--
arch/x86/kernel/paravirt.c | 6 +++---
arch/x86/mm/pgtable.c | 14 +++++++-------
arch/x86/xen/mmu.c | 14 +++++++-------
include/trace/events/xen.h | 2 +-
13 files changed, 42 insertions(+), 40 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d34ef0852f41..ec1a161cb855 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -278,6 +278,12 @@ config ARCH_SUPPORTS_UPROBES
config FIX_EARLYCON_MEM
def_bool y
+config PGTABLE_LEVELS
+ int
+ default 4 if X86_64
+ default 3 if X86_PAE
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 32444ae939ca..7ced2aaab829 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -545,7 +545,7 @@ static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, val);
}
-#if PAGETABLE_LEVELS >= 3
+#if CONFIG_PGTABLE_LEVELS >= 3
static inline pmd_t __pmd(pmdval_t val)
{
pmdval_t ret;
@@ -585,7 +585,7 @@ static inline void set_pud(pud_t *pudp, pud_t pud)
PVOP_VCALL2(pv_mmu_ops.set_pud, pudp,
val);
}
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
static inline pud_t __pud(pudval_t val)
{
pudval_t ret;
@@ -636,9 +636,9 @@ static inline void pud_clear(pud_t *pudp)
set_pud(pudp, __pud(0));
}
-#endif /* PAGETABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
-#endif /* PAGETABLE_LEVELS >= 3 */
+#endif /* CONFIG_PGTABLE_LEVELS >= 3 */
#ifdef CONFIG_X86_PAE
/* Special-case pte-setting operations for PAE, which can't update a
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 7549b8b369e4..f7b0b5c112f2 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -294,7 +294,7 @@ struct pv_mmu_ops {
struct paravirt_callee_save pgd_val;
struct paravirt_callee_save make_pgd;
-#if PAGETABLE_LEVELS >= 3
+#if CONFIG_PGTABLE_LEVELS >= 3
#ifdef CONFIG_X86_PAE
void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
void (*pte_clear)(struct mm_struct *mm, unsigned long addr,
@@ -308,13 +308,13 @@ struct pv_mmu_ops {
struct paravirt_callee_save pmd_val;
struct paravirt_callee_save make_pmd;
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
struct paravirt_callee_save pud_val;
struct paravirt_callee_save make_pud;
void (*set_pgd)(pgd_t *pudp, pgd_t pgdval);
-#endif /* PAGETABLE_LEVELS == 4 */
-#endif /* PAGETABLE_LEVELS >= 3 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS >= 3 */
struct pv_lazy_ops lazy_mode;
diff --git a/arch/x86/include/asm/pgalloc.h b/arch/x86/include/asm/pgalloc.h
index c4412e972bbd..bf7f8b55b0f9 100644
--- a/arch/x86/include/asm/pgalloc.h
+++ b/arch/x86/include/asm/pgalloc.h
@@ -77,7 +77,7 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
#define pmd_pgtable(pmd) pmd_page(pmd)
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
struct page *page;
@@ -116,7 +116,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
}
#endif /* CONFIG_X86_PAE */
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
{
paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
@@ -142,7 +142,7 @@ static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
___pud_free_tlb(tlb, pud);
}
-#endif /* PAGETABLE_LEVELS > 3 */
-#endif /* PAGETABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
#endif /* _ASM_X86_PGALLOC_H */
diff --git a/arch/x86/include/asm/pgtable-2level_types.h b/arch/x86/include/asm/pgtable-2level_types.h
index daacc23e3fb9..392576433e77 100644
--- a/arch/x86/include/asm/pgtable-2level_types.h
+++ b/arch/x86/include/asm/pgtable-2level_types.h
@@ -17,7 +17,6 @@ typedef union {
#endif /* !__ASSEMBLY__ */
#define SHARED_KERNEL_PMD 0
-#define PAGETABLE_LEVELS 2
/*
* traditional i386 two-level paging structure:
diff --git a/arch/x86/include/asm/pgtable-3level_types.h b/arch/x86/include/asm/pgtable-3level_types.h
index 1bd5876c8649..bcc89625ebe5 100644
--- a/arch/x86/include/asm/pgtable-3level_types.h
+++ b/arch/x86/include/asm/pgtable-3level_types.h
@@ -24,8 +24,6 @@ typedef union {
#define SHARED_KERNEL_PMD 1
#endif
-#define PAGETABLE_LEVELS 3
-
/*
* PGDIR_SHIFT determines what a top-level page table entry can map
*/
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 9d0ade00923e..f89d6c9943ea 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -554,7 +554,7 @@ static inline unsigned long pages_to_mb(unsigned long npg)
return npg >> (20 - PAGE_SHIFT);
}
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
static inline int pud_none(pud_t pud)
{
return native_pud_val(pud) == 0;
@@ -597,9 +597,9 @@ static inline int pud_large(pud_t pud)
{
return 0;
}
-#endif /* PAGETABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
static inline int pgd_present(pgd_t pgd)
{
return pgd_flags(pgd) & _PAGE_PRESENT;
@@ -636,7 +636,7 @@ static inline int pgd_none(pgd_t pgd)
{
return !native_pgd_val(pgd);
}
-#endif /* PAGETABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
#endif /* __ASSEMBLY__ */
diff --git a/arch/x86/include/asm/pgtable_64_types.h b/arch/x86/include/asm/pgtable_64_types.h
index 602b6028c5b6..e6844dfb4471 100644
--- a/arch/x86/include/asm/pgtable_64_types.h
+++ b/arch/x86/include/asm/pgtable_64_types.h
@@ -20,7 +20,6 @@ typedef struct { pteval_t pte; } pte_t;
#endif /* !__ASSEMBLY__ */
#define SHARED_KERNEL_PMD 0
-#define PAGETABLE_LEVELS 4
/*
* PGDIR_SHIFT determines what a top-level page table entry can map
diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h
index 8c7c10802e9c..78f0c8cbe316 100644
--- a/arch/x86/include/asm/pgtable_types.h
+++ b/arch/x86/include/asm/pgtable_types.h
@@ -234,7 +234,7 @@ static inline pgdval_t pgd_flags(pgd_t pgd)
return native_pgd_val(pgd) & PTE_FLAGS_MASK;
}
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
typedef struct { pudval_t pud; } pud_t;
static inline pud_t native_make_pud(pmdval_t val)
@@ -255,7 +255,7 @@ static inline pudval_t native_pud_val(pud_t pud)
}
#endif
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
typedef struct { pmdval_t pmd; } pmd_t;
static inline pmd_t native_make_pmd(pmdval_t val)
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 548d25f00c90..c614dd492f5f 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -443,7 +443,7 @@ struct pv_mmu_ops pv_mmu_ops = {
.ptep_modify_prot_start = __ptep_modify_prot_start,
.ptep_modify_prot_commit = __ptep_modify_prot_commit,
-#if PAGETABLE_LEVELS >= 3
+#if CONFIG_PGTABLE_LEVELS >= 3
#ifdef CONFIG_X86_PAE
.set_pte_atomic = native_set_pte_atomic,
.pte_clear = native_pte_clear,
@@ -454,13 +454,13 @@ struct pv_mmu_ops pv_mmu_ops = {
.pmd_val = PTE_IDENT,
.make_pmd = PTE_IDENT,
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
.pud_val = PTE_IDENT,
.make_pud = PTE_IDENT,
.set_pgd = native_set_pgd,
#endif
-#endif /* PAGETABLE_LEVELS >= 3 */
+#endif /* CONFIG_PGTABLE_LEVELS >= 3 */
.pte_val = PTE_IDENT,
.pgd_val = PTE_IDENT,
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 7b22adaad4f1..9885592b9fa7 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -58,7 +58,7 @@ void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
tlb_remove_page(tlb, pte);
}
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
{
struct page *page = virt_to_page(pmd);
@@ -74,14 +74,14 @@ void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
tlb_remove_page(tlb, page);
}
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud)
{
paravirt_release_pud(__pa(pud) >> PAGE_SHIFT);
tlb_remove_page(tlb, virt_to_page(pud));
}
-#endif /* PAGETABLE_LEVELS > 3 */
-#endif /* PAGETABLE_LEVELS > 2 */
+#endif /* CONFIG_PGTABLE_LEVELS > 3 */
+#endif /* CONFIG_PGTABLE_LEVELS > 2 */
static inline void pgd_list_add(pgd_t *pgd)
{
@@ -117,9 +117,9 @@ static void pgd_ctor(struct mm_struct *mm, pgd_t *pgd)
/* If the pgd points to a shared pagetable level (either the
ptes in non-PAE, or shared PMD in PAE), then just copy the
references from swapper_pg_dir. */
- if (PAGETABLE_LEVELS == 2 ||
- (PAGETABLE_LEVELS == 3 && SHARED_KERNEL_PMD) ||
- PAGETABLE_LEVELS == 4) {
+ if (CONFIG_PGTABLE_LEVELS == 2 ||
+ (CONFIG_PGTABLE_LEVELS == 3 && SHARED_KERNEL_PMD) ||
+ CONFIG_PGTABLE_LEVELS == 4) {
clone_pgd_range(pgd + KERNEL_PGD_BOUNDARY,
swapper_pg_dir + KERNEL_PGD_BOUNDARY,
KERNEL_PGD_PTRS);
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index adca9e2b6553..65083ad63b6f 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -502,7 +502,7 @@ __visible pmd_t xen_make_pmd(pmdval_t pmd)
}
PV_CALLEE_SAVE_REGS_THUNK(xen_make_pmd);
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
__visible pudval_t xen_pud_val(pud_t pud)
{
return pte_mfn_to_pfn(pud.pud);
@@ -589,7 +589,7 @@ static void xen_set_pgd(pgd_t *ptr, pgd_t val)
xen_mc_issue(PARAVIRT_LAZY_MMU);
}
-#endif /* PAGETABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
/*
* (Yet another) pagetable walker. This one is intended for pinning a
@@ -1628,7 +1628,7 @@ static void xen_release_pmd(unsigned long pfn)
xen_release_ptpage(pfn, PT_PMD);
}
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
static void xen_alloc_pud(struct mm_struct *mm, unsigned long pfn)
{
xen_alloc_ptpage(mm, pfn, PT_PUD);
@@ -2046,7 +2046,7 @@ static void __init xen_post_allocator_init(void)
pv_mmu_ops.set_pte = xen_set_pte;
pv_mmu_ops.set_pmd = xen_set_pmd;
pv_mmu_ops.set_pud = xen_set_pud;
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
pv_mmu_ops.set_pgd = xen_set_pgd;
#endif
@@ -2056,7 +2056,7 @@ static void __init xen_post_allocator_init(void)
pv_mmu_ops.alloc_pmd = xen_alloc_pmd;
pv_mmu_ops.release_pte = xen_release_pte;
pv_mmu_ops.release_pmd = xen_release_pmd;
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
pv_mmu_ops.alloc_pud = xen_alloc_pud;
pv_mmu_ops.release_pud = xen_release_pud;
#endif
@@ -2122,14 +2122,14 @@ static const struct pv_mmu_ops xen_mmu_ops __initconst = {
.make_pmd = PV_CALLEE_SAVE(xen_make_pmd),
.pmd_val = PV_CALLEE_SAVE(xen_pmd_val),
-#if PAGETABLE_LEVELS == 4
+#if CONFIG_PGTABLE_LEVELS == 4
.pud_val = PV_CALLEE_SAVE(xen_pud_val),
.make_pud = PV_CALLEE_SAVE(xen_make_pud),
.set_pgd = xen_set_pgd_hyper,
.alloc_pud = xen_alloc_pmd_init,
.release_pud = xen_release_pmd_init,
-#endif /* PAGETABLE_LEVELS == 4 */
+#endif /* CONFIG_PGTABLE_LEVELS == 4 */
.activate_mm = xen_activate_mm,
.dup_mmap = xen_dup_mmap,
diff --git a/include/trace/events/xen.h b/include/trace/events/xen.h
index d06b6da5c1e3..bce990f5a35d 100644
--- a/include/trace/events/xen.h
+++ b/include/trace/events/xen.h
@@ -224,7 +224,7 @@ TRACE_EVENT(xen_mmu_pmd_clear,
TP_printk("pmdp %p", __entry->pmdp)
);
-#if PAGETABLE_LEVELS >= 4
+#if CONFIG_PGTABLE_LEVELS >= 4
TRACE_EVENT(xen_mmu_set_pud,
TP_PROTO(pud_t *pudp, pud_t pudval),
--
2.1.4
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH] mm: do not use mm->nr_pmds on !MMU configurations
2015-01-30 14:43 ` Kirill A. Shutemov
@ 2015-01-31 0:36 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-31 0:36 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov
mm->nr_pmds doesn't make sense on !MMU configurations
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
This patch should probably go before the series.
---
include/linux/mm.h | 9 ++++++++-
kernel/fork.c | 4 +---
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index d782617c11de..a09837f3f4b7 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1454,13 +1454,15 @@ static inline int __pud_alloc(struct mm_struct *mm, pgd_t *pgd,
int __pud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address);
#endif
-#ifdef __PAGETABLE_PMD_FOLDED
+#if defined(__PAGETABLE_PMD_FOLDED) || !defined(CONFIG_MMU)
static inline int __pmd_alloc(struct mm_struct *mm, pud_t *pud,
unsigned long address)
{
return 0;
}
+static inline void mm_nr_pmds_init(struct mm_struct *mm) {}
+
static inline unsigned long mm_nr_pmds(struct mm_struct *mm)
{
return 0;
@@ -1472,6 +1474,11 @@ static inline void mm_dec_nr_pmds(struct mm_struct *mm) {}
#else
int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address);
+static inline void mm_nr_pmds_init(struct mm_struct *mm)
+{
+ atomic_long_set(&mm->nr_pmds, 0);
+}
+
static inline unsigned long mm_nr_pmds(struct mm_struct *mm)
{
return atomic_long_read(&mm->nr_pmds);
diff --git a/kernel/fork.c b/kernel/fork.c
index 76d6f292274c..56b82deb6457 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -555,9 +555,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p)
INIT_LIST_HEAD(&mm->mmlist);
mm->core_state = NULL;
atomic_long_set(&mm->nr_ptes, 0);
-#ifndef __PAGETABLE_PMD_FOLDED
- atomic_long_set(&mm->nr_pmds, 0);
-#endif
+ mm_nr_pmds_init(mm);
mm->map_count = 0;
mm->locked_vm = 0;
mm->pinned_vm = 0;
--
2.1.4
^ permalink raw reply related [flat|nested] 93+ messages in thread
* [PATCH] mm: do not use mm->nr_pmds on !MMU configurations
@ 2015-01-31 0:36 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-01-31 0:36 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-mm, linux-kernel, Guenter Roeck, Kirill A. Shutemov
mm->nr_pmds doesn't make sense on !MMU configurations
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
This patch should probably go before the series.
---
include/linux/mm.h | 9 ++++++++-
kernel/fork.c | 4 +---
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index d782617c11de..a09837f3f4b7 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1454,13 +1454,15 @@ static inline int __pud_alloc(struct mm_struct *mm, pgd_t *pgd,
int __pud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address);
#endif
-#ifdef __PAGETABLE_PMD_FOLDED
+#if defined(__PAGETABLE_PMD_FOLDED) || !defined(CONFIG_MMU)
static inline int __pmd_alloc(struct mm_struct *mm, pud_t *pud,
unsigned long address)
{
return 0;
}
+static inline void mm_nr_pmds_init(struct mm_struct *mm) {}
+
static inline unsigned long mm_nr_pmds(struct mm_struct *mm)
{
return 0;
@@ -1472,6 +1474,11 @@ static inline void mm_dec_nr_pmds(struct mm_struct *mm) {}
#else
int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address);
+static inline void mm_nr_pmds_init(struct mm_struct *mm)
+{
+ atomic_long_set(&mm->nr_pmds, 0);
+}
+
static inline unsigned long mm_nr_pmds(struct mm_struct *mm)
{
return atomic_long_read(&mm->nr_pmds);
diff --git a/kernel/fork.c b/kernel/fork.c
index 76d6f292274c..56b82deb6457 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -555,9 +555,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p)
INIT_LIST_HEAD(&mm->mmlist);
mm->core_state = NULL;
atomic_long_set(&mm->nr_ptes, 0);
-#ifndef __PAGETABLE_PMD_FOLDED
- atomic_long_set(&mm->nr_pmds, 0);
-#endif
+ mm_nr_pmds_init(mm);
mm->map_count = 0;
mm->locked_vm = 0;
mm->pinned_vm = 0;
--
2.1.4
--
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^ permalink raw reply related [flat|nested] 93+ messages in thread
* Re: [PATCH 02/19] arm64: expose number of page table levels on Kconfig level
2015-01-30 14:56 ` Catalin Marinas
@ 2015-01-31 6:23 ` Jungseok Lee
-1 siblings, 0 replies; 93+ messages in thread
From: Jungseok Lee @ 2015-01-31 6:23 UTC (permalink / raw)
To: Catalin Marinas
Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel,
Guenter Roeck, Will Deacon
On Jan 30, 2015, at 11:56 PM, Catalin Marinas wrote:
> On Fri, Jan 30, 2015 at 02:43:11PM +0000, Kirill A. Shutemov wrote:
>> We would want to use number of page table level to define mm_struct.
>> Let's expose it as CONFIG_PGTABLE_LEVELS.
>>
>> ARM64_PGTABLE_LEVELS is renamed to PGTABLE_LEVELS and defined before
>> sourcing init/Kconfig: arch/Kconfig will define default value and it's
>> sourced from init/Kconfig.
>>
>> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
>> Cc: Catalin Marinas <catalin.marinas@arm.com>
>> Cc: Will Deacon <will.deacon@arm.com>
>
> It looks fine.
>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
A system can boot up successfully on top of arm64/for-next/core branch under
4KB + {3|4}Level + CONFIG_DEBUG_RODATA, but I don't try it with 64KB pages.
Best Regards
Jungseok Lee
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 02/19] arm64: expose number of page table levels on Kconfig level
@ 2015-01-31 6:23 ` Jungseok Lee
0 siblings, 0 replies; 93+ messages in thread
From: Jungseok Lee @ 2015-01-31 6:23 UTC (permalink / raw)
To: Catalin Marinas
Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel,
Guenter Roeck, Will Deacon
On Jan 30, 2015, at 11:56 PM, Catalin Marinas wrote:
> On Fri, Jan 30, 2015 at 02:43:11PM +0000, Kirill A. Shutemov wrote:
>> We would want to use number of page table level to define mm_struct.
>> Let's expose it as CONFIG_PGTABLE_LEVELS.
>>
>> ARM64_PGTABLE_LEVELS is renamed to PGTABLE_LEVELS and defined before
>> sourcing init/Kconfig: arch/Kconfig will define default value and it's
>> sourced from init/Kconfig.
>>
>> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
>> Cc: Catalin Marinas <catalin.marinas@arm.com>
>> Cc: Will Deacon <will.deacon@arm.com>
>
> It looks fine.
>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
A system can boot up successfully on top of arm64/for-next/core branch under
4KB + {3|4}Level + CONFIG_DEBUG_RODATA, but I don't try it with 64KB pages.
Best Regards
Jungseok Lee
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
2015-01-31 0:11 ` Kirill A. Shutemov
@ 2015-01-31 6:23 ` Guenter Roeck
-1 siblings, 0 replies; 93+ messages in thread
From: Guenter Roeck @ 2015-01-31 6:23 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel
On 01/30/2015 04:11 PM, Kirill A. Shutemov wrote:
>
> The patch below should fix all regressions from -next.
> Please test.
>
Here is the current status, with the tip of your config_pgtable_levels
branch plus a couple of fixes addressing most of the build failures
your branch inherited from -next.
Build results:
total: 134 pass: 133 fail: 1
Failed builds:
sparc64:allmodconfig
Qemu tests:
total: 30 pass: 30 fail: 0
The remaining build failure is not related to your patch series.
There are also some WARNING tracebacks in the arm qemu test, but
those are also not related to your series.
Feel free to add
Tested-by: Guenter Roeck <linux@roeck-us.net>
Guenter
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCH 00/19] expose page table levels on Kconfig leve
@ 2015-01-31 6:23 ` Guenter Roeck
0 siblings, 0 replies; 93+ messages in thread
From: Guenter Roeck @ 2015-01-31 6:23 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Kirill A. Shutemov, Andrew Morton, linux-mm, linux-kernel
On 01/30/2015 04:11 PM, Kirill A. Shutemov wrote:
>
> The patch below should fix all regressions from -next.
> Please test.
>
Here is the current status, with the tip of your config_pgtable_levels
branch plus a couple of fixes addressing most of the build failures
your branch inherited from -next.
Build results:
total: 134 pass: 133 fail: 1
Failed builds:
sparc64:allmodconfig
Qemu tests:
total: 30 pass: 30 fail: 0
The remaining build failure is not related to your patch series.
There are also some WARNING tracebacks in the arm qemu test, but
those are also not related to your series.
Feel free to add
Tested-by: Guenter Roeck <linux@roeck-us.net>
Guenter
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCHv2 17/19] x86: expose number of page table levels on Kconfig level
2015-01-31 0:30 ` Kirill A. Shutemov
@ 2015-02-02 11:26 ` Paul Bolle
-1 siblings, 0 replies; 93+ messages in thread
From: Paul Bolle @ 2015-02-02 11:26 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Martin Schwidefsky, Andrew Morton, linux-mm, linux-kernel,
Guenter Roeck, Thomas Gleixner, Ingo Molnar, H. Peter Anvin
On Sat, 2015-01-31 at 02:30 +0200, Kirill A. Shutemov wrote:
> We would want to use number of page table level to define mm_struct.
> Let's expose it as CONFIG_PGTABLE_LEVELS.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: "H. Peter Anvin" <hpa@zytor.com>
> ---
> v2: s/PAGETABLE_LEVELS/CONFIG_PGTABLE_LEVELS/ include/trace/events/xen.h
Isn't there some (informal) rule to update an entire series to a next
version (and not only the patches that were changed in that version)?
Anyhow, it seems you sent a v2 for 05/19, 11/19 and 17/19 only. Is that
correct?
Thanks,
Paul Bolle
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCHv2 17/19] x86: expose number of page table levels on Kconfig level
@ 2015-02-02 11:26 ` Paul Bolle
0 siblings, 0 replies; 93+ messages in thread
From: Paul Bolle @ 2015-02-02 11:26 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Martin Schwidefsky, Andrew Morton, linux-mm, linux-kernel,
Guenter Roeck, Thomas Gleixner, Ingo Molnar, H. Peter Anvin
On Sat, 2015-01-31 at 02:30 +0200, Kirill A. Shutemov wrote:
> We would want to use number of page table level to define mm_struct.
> Let's expose it as CONFIG_PGTABLE_LEVELS.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: "H. Peter Anvin" <hpa@zytor.com>
> ---
> v2: s/PAGETABLE_LEVELS/CONFIG_PGTABLE_LEVELS/ include/trace/events/xen.h
Isn't there some (informal) rule to update an entire series to a next
version (and not only the patches that were changed in that version)?
Anyhow, it seems you sent a v2 for 05/19, 11/19 and 17/19 only. Is that
correct?
Thanks,
Paul Bolle
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCHv2 17/19] x86: expose number of page table levels on Kconfig level
2015-02-02 11:26 ` Paul Bolle
@ 2015-02-02 11:37 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-02-02 11:37 UTC (permalink / raw)
To: Paul Bolle
Cc: Kirill A. Shutemov, Martin Schwidefsky, Andrew Morton, linux-mm,
linux-kernel, Guenter Roeck, Thomas Gleixner, Ingo Molnar,
H. Peter Anvin
On Mon, Feb 02, 2015 at 12:26:33PM +0100, Paul Bolle wrote:
> On Sat, 2015-01-31 at 02:30 +0200, Kirill A. Shutemov wrote:
> > We would want to use number of page table level to define mm_struct.
> > Let's expose it as CONFIG_PGTABLE_LEVELS.
> >
> > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> > Cc: Thomas Gleixner <tglx@linutronix.de>
> > Cc: Ingo Molnar <mingo@redhat.com>
> > Cc: "H. Peter Anvin" <hpa@zytor.com>
> > ---
> > v2: s/PAGETABLE_LEVELS/CONFIG_PGTABLE_LEVELS/ include/trace/events/xen.h
>
> Isn't there some (informal) rule to update an entire series to a next
> version (and not only the patches that were changed in that version)?
It's up to maintainer. I can do any way. Last time I've asked, Andrew was
okay with v2 on individual patches.
> Anyhow, it seems you sent a v2 for 05/19, 11/19 and 17/19 only. Is that
> correct?
Correct. Plus one patch to fix build on all !MMU configurations.
I've also updated the git tree.
--
Kirill A. Shutemov
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCHv2 17/19] x86: expose number of page table levels on Kconfig level
@ 2015-02-02 11:37 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-02-02 11:37 UTC (permalink / raw)
To: Paul Bolle
Cc: Kirill A. Shutemov, Martin Schwidefsky, Andrew Morton, linux-mm,
linux-kernel, Guenter Roeck, Thomas Gleixner, Ingo Molnar,
H. Peter Anvin
On Mon, Feb 02, 2015 at 12:26:33PM +0100, Paul Bolle wrote:
> On Sat, 2015-01-31 at 02:30 +0200, Kirill A. Shutemov wrote:
> > We would want to use number of page table level to define mm_struct.
> > Let's expose it as CONFIG_PGTABLE_LEVELS.
> >
> > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> > Cc: Thomas Gleixner <tglx@linutronix.de>
> > Cc: Ingo Molnar <mingo@redhat.com>
> > Cc: "H. Peter Anvin" <hpa@zytor.com>
> > ---
> > v2: s/PAGETABLE_LEVELS/CONFIG_PGTABLE_LEVELS/ include/trace/events/xen.h
>
> Isn't there some (informal) rule to update an entire series to a next
> version (and not only the patches that were changed in that version)?
It's up to maintainer. I can do any way. Last time I've asked, Andrew was
okay with v2 on individual patches.
> Anyhow, it seems you sent a v2 for 05/19, 11/19 and 17/19 only. Is that
> correct?
Correct. Plus one patch to fix build on all !MMU configurations.
I've also updated the git tree.
--
Kirill A. Shutemov
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCHv2 17/19] x86: expose number of page table levels on Kconfig level
2015-02-02 11:37 ` Kirill A. Shutemov
@ 2015-02-02 11:57 ` Paul Bolle
-1 siblings, 0 replies; 93+ messages in thread
From: Paul Bolle @ 2015-02-02 11:57 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Kirill A. Shutemov, Martin Schwidefsky, Andrew Morton, linux-mm,
linux-kernel, Guenter Roeck, Thomas Gleixner, Ingo Molnar,
H. Peter Anvin
On Mon, 2015-02-02 at 13:37 +0200, Kirill A. Shutemov wrote:
> On Mon, Feb 02, 2015 at 12:26:33PM +0100, Paul Bolle wrote:
> > Isn't there some (informal) rule to update an entire series to a next
> > version (and not only the patches that were changed in that version)?
>
> It's up to maintainer. I can do any way. Last time I've asked, Andrew was
> okay with v2 on individual patches.
>
> > Anyhow, it seems you sent a v2 for 05/19, 11/19 and 17/19 only. Is that
> > correct?
>
> Correct. Plus one patch to fix build on all !MMU configurations.
>
> I've also updated the git tree.
Which tree would that be?
Thanks,
Paul Bolle
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCHv2 17/19] x86: expose number of page table levels on Kconfig level
@ 2015-02-02 11:57 ` Paul Bolle
0 siblings, 0 replies; 93+ messages in thread
From: Paul Bolle @ 2015-02-02 11:57 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Kirill A. Shutemov, Martin Schwidefsky, Andrew Morton, linux-mm,
linux-kernel, Guenter Roeck, Thomas Gleixner, Ingo Molnar,
H. Peter Anvin
On Mon, 2015-02-02 at 13:37 +0200, Kirill A. Shutemov wrote:
> On Mon, Feb 02, 2015 at 12:26:33PM +0100, Paul Bolle wrote:
> > Isn't there some (informal) rule to update an entire series to a next
> > version (and not only the patches that were changed in that version)?
>
> It's up to maintainer. I can do any way. Last time I've asked, Andrew was
> okay with v2 on individual patches.
>
> > Anyhow, it seems you sent a v2 for 05/19, 11/19 and 17/19 only. Is that
> > correct?
>
> Correct. Plus one patch to fix build on all !MMU configurations.
>
> I've also updated the git tree.
Which tree would that be?
Thanks,
Paul Bolle
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCHv2 17/19] x86: expose number of page table levels on Kconfig level
2015-02-02 11:57 ` Paul Bolle
@ 2015-02-02 12:07 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-02-02 12:07 UTC (permalink / raw)
To: Paul Bolle
Cc: Kirill A. Shutemov, Martin Schwidefsky, Andrew Morton, linux-mm,
linux-kernel, Guenter Roeck, Thomas Gleixner, Ingo Molnar,
H. Peter Anvin
On Mon, Feb 02, 2015 at 12:57:36PM +0100, Paul Bolle wrote:
> On Mon, 2015-02-02 at 13:37 +0200, Kirill A. Shutemov wrote:
> > On Mon, Feb 02, 2015 at 12:26:33PM +0100, Paul Bolle wrote:
> > > Isn't there some (informal) rule to update an entire series to a next
> > > version (and not only the patches that were changed in that version)?
> >
> > It's up to maintainer. I can do any way. Last time I've asked, Andrew was
> > okay with v2 on individual patches.
> >
> > > Anyhow, it seems you sent a v2 for 05/19, 11/19 and 17/19 only. Is that
> > > correct?
> >
> > Correct. Plus one patch to fix build on all !MMU configurations.
> >
> > I've also updated the git tree.
>
> Which tree would that be?
git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git config_pgtable_levels
--
Kirill A. Shutemov
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCHv2 17/19] x86: expose number of page table levels on Kconfig level
@ 2015-02-02 12:07 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-02-02 12:07 UTC (permalink / raw)
To: Paul Bolle
Cc: Kirill A. Shutemov, Martin Schwidefsky, Andrew Morton, linux-mm,
linux-kernel, Guenter Roeck, Thomas Gleixner, Ingo Molnar,
H. Peter Anvin
On Mon, Feb 02, 2015 at 12:57:36PM +0100, Paul Bolle wrote:
> On Mon, 2015-02-02 at 13:37 +0200, Kirill A. Shutemov wrote:
> > On Mon, Feb 02, 2015 at 12:26:33PM +0100, Paul Bolle wrote:
> > > Isn't there some (informal) rule to update an entire series to a next
> > > version (and not only the patches that were changed in that version)?
> >
> > It's up to maintainer. I can do any way. Last time I've asked, Andrew was
> > okay with v2 on individual patches.
> >
> > > Anyhow, it seems you sent a v2 for 05/19, 11/19 and 17/19 only. Is that
> > > correct?
> >
> > Correct. Plus one patch to fix build on all !MMU configurations.
> >
> > I've also updated the git tree.
>
> Which tree would that be?
git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git config_pgtable_levels
--
Kirill A. Shutemov
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCHv2 05/19] ia64: expose number of page table levels on Kconfig level
2015-01-31 0:17 ` Kirill A. Shutemov
@ 2015-02-02 12:56 ` Paul Bolle
-1 siblings, 0 replies; 93+ messages in thread
From: Paul Bolle @ 2015-02-02 12:56 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Martin Schwidefsky, Andrew Morton, linux-mm, linux-kernel,
Guenter Roeck, Tony Luck, Fenghua Yu
On Sat, 2015-01-31 at 02:17 +0200, Kirill A. Shutemov wrote:
> We would want to use number of page table level to define mm_struct.
> Let's expose it as CONFIG_PGTABLE_LEVELS.
>
> We need to define PGTABLE_LEVELS before sourcing init/Kconfig:
> arch/Kconfig will define default value and it's sourced from init/Kconfig.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Cc: Tony Luck <tony.luck@intel.com>
> Cc: Fenghua Yu <fenghua.yu@intel.com>
> ---
> v2: fix default for IA64_PAGE_SIZE_64KB
> ---
> arch/ia64/Kconfig | 18 +++++-------------
> arch/ia64/include/asm/page.h | 4 ++--
> arch/ia64/include/asm/pgalloc.h | 4 ++--
> arch/ia64/include/asm/pgtable.h | 12 ++++++------
> arch/ia64/kernel/ivt.S | 12 ++++++------
> arch/ia64/kernel/machine_kexec.c | 4 ++--
> 6 files changed, 23 insertions(+), 31 deletions(-)
>
> diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
> index 074e52bf815c..4f9a6661491b 100644
> --- a/arch/ia64/Kconfig
> +++ b/arch/ia64/Kconfig
> @@ -1,3 +1,8 @@
> +config PGTABLE_LEVELS
> + int "Page Table Levels" if !IA64_PAGE_SIZE_64KB
> + range 3 4 if !IA64_PAGE_SIZE_64KB
> + default 3
> +
Why didn't you choose to make this something like
config PGTABLE_LEVELS
int
default 3 if PGTABLE_3
default 4 if PGTABLE_4
> source "init/Kconfig"
>
> source "kernel/Kconfig.freezer"
> @@ -286,19 +291,6 @@ config IA64_PAGE_SIZE_64KB
>
> endchoice
>
> -choice
> - prompt "Page Table Levels"
> - default PGTABLE_3
> -
> -config PGTABLE_3
> - bool "3 Levels"
> -
> -config PGTABLE_4
> - depends on !IA64_PAGE_SIZE_64KB
> - bool "4 Levels"
> -
> -endchoice
> -
> if IA64_HP_SIM
> config HZ
> default 32
... and drop this hunk (ie, keep this choice as it is)? That would make
upgrading to a release that uses PGTABLE_LEVELS do the right thing
automagically, wouldn't it? As currently in the !IA64_PAGE_SIZE_64KB
case people need to reconfigure their "Page Table Levels".
Paul Bolle
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCHv2 05/19] ia64: expose number of page table levels on Kconfig level
@ 2015-02-02 12:56 ` Paul Bolle
0 siblings, 0 replies; 93+ messages in thread
From: Paul Bolle @ 2015-02-02 12:56 UTC (permalink / raw)
To: Kirill A. Shutemov
Cc: Martin Schwidefsky, Andrew Morton, linux-mm, linux-kernel,
Guenter Roeck, Tony Luck, Fenghua Yu
On Sat, 2015-01-31 at 02:17 +0200, Kirill A. Shutemov wrote:
> We would want to use number of page table level to define mm_struct.
> Let's expose it as CONFIG_PGTABLE_LEVELS.
>
> We need to define PGTABLE_LEVELS before sourcing init/Kconfig:
> arch/Kconfig will define default value and it's sourced from init/Kconfig.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Cc: Tony Luck <tony.luck@intel.com>
> Cc: Fenghua Yu <fenghua.yu@intel.com>
> ---
> v2: fix default for IA64_PAGE_SIZE_64KB
> ---
> arch/ia64/Kconfig | 18 +++++-------------
> arch/ia64/include/asm/page.h | 4 ++--
> arch/ia64/include/asm/pgalloc.h | 4 ++--
> arch/ia64/include/asm/pgtable.h | 12 ++++++------
> arch/ia64/kernel/ivt.S | 12 ++++++------
> arch/ia64/kernel/machine_kexec.c | 4 ++--
> 6 files changed, 23 insertions(+), 31 deletions(-)
>
> diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
> index 074e52bf815c..4f9a6661491b 100644
> --- a/arch/ia64/Kconfig
> +++ b/arch/ia64/Kconfig
> @@ -1,3 +1,8 @@
> +config PGTABLE_LEVELS
> + int "Page Table Levels" if !IA64_PAGE_SIZE_64KB
> + range 3 4 if !IA64_PAGE_SIZE_64KB
> + default 3
> +
Why didn't you choose to make this something like
config PGTABLE_LEVELS
int
default 3 if PGTABLE_3
default 4 if PGTABLE_4
> source "init/Kconfig"
>
> source "kernel/Kconfig.freezer"
> @@ -286,19 +291,6 @@ config IA64_PAGE_SIZE_64KB
>
> endchoice
>
> -choice
> - prompt "Page Table Levels"
> - default PGTABLE_3
> -
> -config PGTABLE_3
> - bool "3 Levels"
> -
> -config PGTABLE_4
> - depends on !IA64_PAGE_SIZE_64KB
> - bool "4 Levels"
> -
> -endchoice
> -
> if IA64_HP_SIM
> config HZ
> default 32
... and drop this hunk (ie, keep this choice as it is)? That would make
upgrading to a release that uses PGTABLE_LEVELS do the right thing
automagically, wouldn't it? As currently in the !IA64_PAGE_SIZE_64KB
case people need to reconfigure their "Page Table Levels".
Paul Bolle
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
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^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCHv2 05/19] ia64: expose number of page table levels on Kconfig level
2015-02-02 12:56 ` Paul Bolle
@ 2015-02-02 13:50 ` Kirill A. Shutemov
-1 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-02-02 13:50 UTC (permalink / raw)
To: Paul Bolle
Cc: Kirill A. Shutemov, Martin Schwidefsky, Andrew Morton, linux-mm,
linux-kernel, Guenter Roeck, Tony Luck, Fenghua Yu
On Mon, Feb 02, 2015 at 01:56:39PM +0100, Paul Bolle wrote:
> On Sat, 2015-01-31 at 02:17 +0200, Kirill A. Shutemov wrote:
> > We would want to use number of page table level to define mm_struct.
> > Let's expose it as CONFIG_PGTABLE_LEVELS.
> >
> > We need to define PGTABLE_LEVELS before sourcing init/Kconfig:
> > arch/Kconfig will define default value and it's sourced from init/Kconfig.
> >
> > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> > Cc: Tony Luck <tony.luck@intel.com>
> > Cc: Fenghua Yu <fenghua.yu@intel.com>
> > ---
> > v2: fix default for IA64_PAGE_SIZE_64KB
> > ---
> > arch/ia64/Kconfig | 18 +++++-------------
> > arch/ia64/include/asm/page.h | 4 ++--
> > arch/ia64/include/asm/pgalloc.h | 4 ++--
> > arch/ia64/include/asm/pgtable.h | 12 ++++++------
> > arch/ia64/kernel/ivt.S | 12 ++++++------
> > arch/ia64/kernel/machine_kexec.c | 4 ++--
> > 6 files changed, 23 insertions(+), 31 deletions(-)
> >
> > diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
> > index 074e52bf815c..4f9a6661491b 100644
> > --- a/arch/ia64/Kconfig
> > +++ b/arch/ia64/Kconfig
> > @@ -1,3 +1,8 @@
> > +config PGTABLE_LEVELS
> > + int "Page Table Levels" if !IA64_PAGE_SIZE_64KB
> > + range 3 4 if !IA64_PAGE_SIZE_64KB
> > + default 3
> > +
>
> Why didn't you choose to make this something like
> config PGTABLE_LEVELS
> int
> default 3 if PGTABLE_3
> default 4 if PGTABLE_4
>
> > source "init/Kconfig"
> >
> > source "kernel/Kconfig.freezer"
> > @@ -286,19 +291,6 @@ config IA64_PAGE_SIZE_64KB
> >
> > endchoice
> >
> > -choice
> > - prompt "Page Table Levels"
> > - default PGTABLE_3
> > -
> > -config PGTABLE_3
> > - bool "3 Levels"
> > -
> > -config PGTABLE_4
> > - depends on !IA64_PAGE_SIZE_64KB
> > - bool "4 Levels"
> > -
> > -endchoice
> > -
> > if IA64_HP_SIM
> > config HZ
> > default 32
>
> ... and drop this hunk (ie, keep this choice as it is)? That would make
> upgrading to a release that uses PGTABLE_LEVELS do the right thing
> automagically, wouldn't it? As currently in the !IA64_PAGE_SIZE_64KB
> case people need to reconfigure their "Page Table Levels".
Again: I can do it if maintainers prefer.
But I don't see much sense in having arch-specific kconfig option if we
have generic one.
--
Kirill A. Shutemov
^ permalink raw reply [flat|nested] 93+ messages in thread
* Re: [PATCHv2 05/19] ia64: expose number of page table levels on Kconfig level
@ 2015-02-02 13:50 ` Kirill A. Shutemov
0 siblings, 0 replies; 93+ messages in thread
From: Kirill A. Shutemov @ 2015-02-02 13:50 UTC (permalink / raw)
To: Paul Bolle
Cc: Kirill A. Shutemov, Martin Schwidefsky, Andrew Morton, linux-mm,
linux-kernel, Guenter Roeck, Tony Luck, Fenghua Yu
On Mon, Feb 02, 2015 at 01:56:39PM +0100, Paul Bolle wrote:
> On Sat, 2015-01-31 at 02:17 +0200, Kirill A. Shutemov wrote:
> > We would want to use number of page table level to define mm_struct.
> > Let's expose it as CONFIG_PGTABLE_LEVELS.
> >
> > We need to define PGTABLE_LEVELS before sourcing init/Kconfig:
> > arch/Kconfig will define default value and it's sourced from init/Kconfig.
> >
> > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> > Cc: Tony Luck <tony.luck@intel.com>
> > Cc: Fenghua Yu <fenghua.yu@intel.com>
> > ---
> > v2: fix default for IA64_PAGE_SIZE_64KB
> > ---
> > arch/ia64/Kconfig | 18 +++++-------------
> > arch/ia64/include/asm/page.h | 4 ++--
> > arch/ia64/include/asm/pgalloc.h | 4 ++--
> > arch/ia64/include/asm/pgtable.h | 12 ++++++------
> > arch/ia64/kernel/ivt.S | 12 ++++++------
> > arch/ia64/kernel/machine_kexec.c | 4 ++--
> > 6 files changed, 23 insertions(+), 31 deletions(-)
> >
> > diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
> > index 074e52bf815c..4f9a6661491b 100644
> > --- a/arch/ia64/Kconfig
> > +++ b/arch/ia64/Kconfig
> > @@ -1,3 +1,8 @@
> > +config PGTABLE_LEVELS
> > + int "Page Table Levels" if !IA64_PAGE_SIZE_64KB
> > + range 3 4 if !IA64_PAGE_SIZE_64KB
> > + default 3
> > +
>
> Why didn't you choose to make this something like
> config PGTABLE_LEVELS
> int
> default 3 if PGTABLE_3
> default 4 if PGTABLE_4
>
> > source "init/Kconfig"
> >
> > source "kernel/Kconfig.freezer"
> > @@ -286,19 +291,6 @@ config IA64_PAGE_SIZE_64KB
> >
> > endchoice
> >
> > -choice
> > - prompt "Page Table Levels"
> > - default PGTABLE_3
> > -
> > -config PGTABLE_3
> > - bool "3 Levels"
> > -
> > -config PGTABLE_4
> > - depends on !IA64_PAGE_SIZE_64KB
> > - bool "4 Levels"
> > -
> > -endchoice
> > -
> > if IA64_HP_SIM
> > config HZ
> > default 32
>
> ... and drop this hunk (ie, keep this choice as it is)? That would make
> upgrading to a release that uses PGTABLE_LEVELS do the right thing
> automagically, wouldn't it? As currently in the !IA64_PAGE_SIZE_64KB
> case people need to reconfigure their "Page Table Levels".
Again: I can do it if maintainers prefer.
But I don't see much sense in having arch-specific kconfig option if we
have generic one.
--
Kirill A. Shutemov
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
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^ permalink raw reply [flat|nested] 93+ messages in thread
end of thread, other threads:[~2015-02-02 13:51 UTC | newest]
Thread overview: 93+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-01-30 14:43 [PATCH 00/19] expose page table levels on Kconfig leve Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 01/19] alpha: expose number of page table levels on Kconfig level Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 02/19] arm64: " Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:56 ` Catalin Marinas
2015-01-30 14:56 ` Catalin Marinas
2015-01-31 6:23 ` Jungseok Lee
2015-01-31 6:23 ` Jungseok Lee
2015-01-30 14:43 ` [PATCH 03/19] arm: " Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 16:02 ` Russell King - ARM Linux
2015-01-30 16:02 ` Russell King - ARM Linux
2015-01-30 16:24 ` Kirill A. Shutemov
2015-01-30 16:24 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 04/19] frv: mark PUD and PMD folded Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 05/19] ia64: expose number of page table levels on Kconfig level Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-31 0:17 ` [PATCHv2 " Kirill A. Shutemov
2015-01-31 0:17 ` Kirill A. Shutemov
2015-02-02 12:56 ` Paul Bolle
2015-02-02 12:56 ` Paul Bolle
2015-02-02 13:50 ` Kirill A. Shutemov
2015-02-02 13:50 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 06/19] m32r: mark PMD folded Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 07/19] m68k: mark PMD folded and expose number of page table levels Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 08/19] mips: expose number of page table levels on Kconfig level Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 09/19] mn10300: mark PUD and PMD folded Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 10/19] parisc: expose number of page table levels on Kconfig level Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 11/19] powerpc: " Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-31 0:27 ` [PATCHv2 " Kirill A. Shutemov
2015-01-31 0:27 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 12/19] s390: expose number of page table levels Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:48 ` Martin Schwidefsky
2015-01-30 14:48 ` Martin Schwidefsky
2015-01-30 14:54 ` [PATCHv2 " Kirill A. Shutemov
2015-01-30 14:54 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 13/19] sh: " Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 14/19] sparc: " Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 15/19] tile: " Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:49 ` Chris Metcalf
2015-01-30 14:49 ` Chris Metcalf
2015-01-30 14:43 ` [PATCH 16/19] um: " Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 19:29 ` Richard Weinberger
2015-01-30 19:29 ` Richard Weinberger
2015-01-30 14:43 ` [PATCH 17/19] x86: expose number of page table levels on Kconfig level Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-31 0:30 ` [PATCHv2 " Kirill A. Shutemov
2015-01-31 0:30 ` Kirill A. Shutemov
2015-02-02 11:26 ` Paul Bolle
2015-02-02 11:26 ` Paul Bolle
2015-02-02 11:37 ` Kirill A. Shutemov
2015-02-02 11:37 ` Kirill A. Shutemov
2015-02-02 11:57 ` Paul Bolle
2015-02-02 11:57 ` Paul Bolle
2015-02-02 12:07 ` Kirill A. Shutemov
2015-02-02 12:07 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 18/19] mm: define default PGTABLE_LEVELS to two Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 14:43 ` [PATCH 19/19] mm: do not add nr_pmds into mm_struct if PMD is folded Kirill A. Shutemov
2015-01-30 14:43 ` Kirill A. Shutemov
2015-01-30 17:26 ` [PATCH 00/19] expose page table levels on Kconfig leve Guenter Roeck
2015-01-30 17:26 ` Guenter Roeck
2015-01-30 18:50 ` Kirill A. Shutemov
2015-01-30 18:50 ` Kirill A. Shutemov
2015-01-30 19:14 ` Guenter Roeck
2015-01-30 19:14 ` Guenter Roeck
2015-01-30 20:09 ` Kirill A. Shutemov
2015-01-30 20:09 ` Kirill A. Shutemov
2015-01-30 20:41 ` Guenter Roeck
2015-01-30 20:41 ` Guenter Roeck
2015-01-30 20:59 ` Guenter Roeck
2015-01-30 20:59 ` Guenter Roeck
2015-01-31 0:11 ` Kirill A. Shutemov
2015-01-31 0:11 ` Kirill A. Shutemov
2015-01-31 6:23 ` Guenter Roeck
2015-01-31 6:23 ` Guenter Roeck
2015-01-31 0:36 ` [PATCH] mm: do not use mm->nr_pmds on !MMU configurations Kirill A. Shutemov
2015-01-31 0:36 ` Kirill A. Shutemov
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