[PATCH -v19 00/25] Use lmb with x86

[PATCH -v19 00/25] Use lmb with x86

[Yinghai Lu]

New lmb could be used to replace early_res in x86.

Suggested by: David, Ben, and Thomas

-v6: change sequence as requested by Thomas
-v7: seperate them to more patches
-v8: add boundary checking to make sure not free partial page.
-v9: use lmb_debug to control print out of reserve_lmb.
     add e820 clean up, and e820 become __initdata
-v10:use lmb.rmo_size and ARCH_DISCARD_LMB according to Michael
     change name to lmb_find_area/reserve_lmb_area/free_lmb_area,
      according to Michael
     update find_lmb_area to use __lmb_alloc_base according to ben
-v11:move find_lmb_area_size back to x86.
     x86 has own find_lmb_area, and could be disabled by ARCH_LMB_FIND_AREA
      because _lmb_find_base has different behavoir from x86's old one.
      one from high to high and one from low to high
      need more test
     tested for x86 32bit/64bit, numa/nonuma, nobootmem/bootmem.
-v12:refresh the series with current tip
     seperate nobootmem.c, so could remove some #ifdef
     still keep CONFIG_NO_BOOTMEM, in x86 .c, and could use the as tags
     so other lmb could refer them to use NO_BOOTMEM.

-v14:refresh to current tip

-v15:remove x86 version lmb_find_area
     remove other nobootmem and x86 e820 from this patchset

-v16: rebase to Ben's cleanup powerpc/lmb
     move back most func back to arch/x86/mm/lmb.c

-v17: remove exposing of lmb_add_region
     seperate first lmb core related patch to several small patches.

-v18: change lmb_find_area to lmb_find_in_range
      kill __lmb_find_area and use lmb_find_area directly
      remove lmb_add_memory
      change lmb_reserve_area to lmb_reserve_range
      change lmb_free_area to lmb_free_range
      don't clear lmb.reserved after converting
      use for_each_lmb to replace for cycle
      rebase to 06/15/2010 powerpc/lmb

-v19: make the patchset only focus on lmb related.
      will submit patches about bootmem/nobootmem seperating and other e820
	 related later after this one.

this patcheset is based on tip/master+powerpc/lmb

todo:
     replace range handling (subtracting) with lmb.

Thanks

Yinghai Lu

 arch/x86/Kconfig                |    9 +-
 arch/x86/include/asm/e820.h     |   21 +-
 arch/x86/include/asm/efi.h      |    2 +-
 arch/x86/include/asm/lmb.h      |   21 ++
 arch/x86/kernel/acpi/sleep.c    |    7 +-
 arch/x86/kernel/apic/numaq_32.c |    3 +-
 arch/x86/kernel/check.c         |   16 +-
 arch/x86/kernel/e820.c          |  197 ++++----------
 arch/x86/kernel/efi.c           |    5 +-
 arch/x86/kernel/head.c          |    3 +-
 arch/x86/kernel/head32.c        |   10 +-
 arch/x86/kernel/head64.c        |    7 +-
 arch/x86/kernel/mpparse.c       |    5 +-
 arch/x86/kernel/setup.c         |   76 ++++--
 arch/x86/kernel/setup_percpu.c  |    6 -
 arch/x86/kernel/trampoline.c    |    8 +-
 arch/x86/mm/Makefile            |    2 +
 arch/x86/mm/init.c              |    7 +-
 arch/x86/mm/init_32.c           |   31 +-
 arch/x86/mm/init_64.c           |   38 +--
 arch/x86/mm/k8topology_64.c     |    4 +-
 arch/x86/mm/lmb.c               |  398 ++++++++++++++++++++++++++
 arch/x86/mm/memtest.c           |    7 +-
 arch/x86/mm/numa_32.c           |   25 +-
 arch/x86/mm/numa_64.c           |   45 ++--
 arch/x86/mm/srat_32.c           |    3 +-
 arch/x86/mm/srat_64.c           |   13 +-
 arch/x86/xen/mmu.c              |    5 +-
 arch/x86/xen/setup.c            |    3 +-
 include/linux/early_res.h       |   23 --
 include/linux/lmb.h             |   17 ++
 include/linux/mm.h              |    2 +
 kernel/Makefile                 |    1 -
 kernel/early_res.c              |  584 ---------------------------------------
 lib/lmb.c                       |   65 +++--
 lib/swiotlb.c                   |   16 +-
 mm/bootmem.c                    |   11 +-
 mm/page_alloc.c                 |   72 +++--
 mm/sparse-vmemmap.c             |   11 -
 39 files changed, 777 insertions(+), 1002 deletions(-)
 create mode 100644 arch/x86/include/asm/lmb.h
 create mode 100644 arch/x86/mm/lmb.c
 delete mode 100644 include/linux/early_res.h
 delete mode 100644 kernel/early_res.c

[PATCH 01/25] lmb: lmb_find_base() should return LMB_ERROR on failing path

[Yinghai Lu]

all callees assume it return LMB_ERROR when it fail to find a range

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 lib/lmb.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/lib/lmb.c b/lib/lmb.c
index 2421b2a..13d1a04 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -154,7 +154,7 @@ static phys_addr_t __init lmb_find_base(phys_addr_t size, phys_addr_t align,
 		if (found != LMB_ERROR)
 			return found;
 	}
-	return 0;
+	return LMB_ERROR;
 }
 
 static void lmb_remove_region(struct lmb_type *type, unsigned long r)
-- 
1.6.4.2

[PATCH 02/25] lmb: Prepare x86 to use lmb to replace early_res

[Yinghai Lu]

1. expose lmb_debug
2. expose lmb_reserved_init_regions

-v2: drop lmb_add_region() and LMB_ERROR export
-v3: seperate wrong return of lmb_fin_base to another patch
-v4: expose lmb_can_resize to handle x86 EFI that could have more than
      128 entries

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 include/linux/lmb.h |    3 +++
 lib/lmb.c           |    5 +++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/linux/lmb.h b/include/linux/lmb.h
index 6f8c4bd..1e96224 100644
--- a/include/linux/lmb.h
+++ b/include/linux/lmb.h
@@ -39,6 +39,9 @@ struct lmb {
 };
 
 extern struct lmb lmb;
+extern int lmb_debug;
+extern int lmb_can_resize;
+extern struct lmb_region lmb_reserved_init_regions[];
 
 extern void __init lmb_init(void);
 extern void __init lmb_analyze(void);
diff --git a/lib/lmb.c b/lib/lmb.c
index 13d1a04..bbdb1ec 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -22,9 +22,10 @@
 
 struct lmb lmb;
 
-static int lmb_debug, lmb_can_resize;
+int lmb_debug;
+int lmb_can_resize;
 static struct lmb_region lmb_memory_init_regions[INIT_LMB_REGIONS + 1];
-static struct lmb_region lmb_reserved_init_regions[INIT_LMB_REGIONS + 1];
+struct lmb_region lmb_reserved_init_regions[INIT_LMB_REGIONS + 1];
 
 #define LMB_ERROR	(~(phys_addr_t)0)
 
-- 
1.6.4.2

[PATCH 03/25] lmb: Print new doubled array location info

[Yinghai Lu]

so will have more idea where it is,  use lmb_debug to controll it

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 lib/lmb.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/lmb.c b/lib/lmb.c
index bbdb1ec..7a6e11a 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -192,8 +192,6 @@ static int lmb_double_array(struct lmb_type *type)
 	if (!lmb_can_resize)
 		return -1;
 
-	pr_debug("lmb: %s array full, doubling...", lmb_type_name(type));
-
 	/* Calculate new doubled size */
 	old_size = type->max * sizeof(struct lmb_region);
 	new_size = old_size << 1;
@@ -221,6 +219,10 @@ static int lmb_double_array(struct lmb_type *type)
 	}
 	new_array = __va(addr);
 
+	if (lmb_debug)
+		pr_info("lmb: %s array is doubled to %ld at %llx - %llx",
+			 lmb_type_name(type), type->max * 2, (u64)addr, (u64)addr + new_size);
+
 	/* Found space, we now need to move the array over before
 	 * we add the reserved region since it may be our reserved
 	 * array itself that is full.
-- 
1.6.4.2

[PATCH 04/25] lmb: Export LMB_ERROR again

[Yinghai Lu]

will used by x86 lmb_find_in_range_node and nobootmem replacement

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 include/linux/lmb.h |    1 +
 lib/lmb.c           |    2 --
 2 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/include/linux/lmb.h b/include/linux/lmb.h
index 1e96224..eb8a5a3 100644
--- a/include/linux/lmb.h
+++ b/include/linux/lmb.h
@@ -19,6 +19,7 @@
 #include <asm/lmb.h>
 
 #define INIT_LMB_REGIONS 128
+#define LMB_ERROR	(~(phys_addr_t)0)
 
 struct lmb_region {
 	phys_addr_t base;
diff --git a/lib/lmb.c b/lib/lmb.c
index 7a6e11a..2aaeeec 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -27,8 +27,6 @@ int lmb_can_resize;
 static struct lmb_region lmb_memory_init_regions[INIT_LMB_REGIONS + 1];
 struct lmb_region lmb_reserved_init_regions[INIT_LMB_REGIONS + 1];
 
-#define LMB_ERROR	(~(phys_addr_t)0)
-
 /* inline so we don't get a warning when pr_debug is compiled out */
 static inline const char *lmb_type_name(struct lmb_type *type)
 {
-- 
1.6.4.2

[PATCH 05/25] lmb: Prepare to include linux/lmb.h in core file

[Yinghai Lu]

Need to add protection in linux/lmb.h, to prepare to include it in
 mm/page_alloc.c and mm/bootmem.c etc.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 include/linux/lmb.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/include/linux/lmb.h b/include/linux/lmb.h
index eb8a5a3..d529232 100644
--- a/include/linux/lmb.h
+++ b/include/linux/lmb.h
@@ -2,6 +2,7 @@
 #define _LINUX_LMB_H
 #ifdef __KERNEL__
 
+#ifdef CONFIG_HAVE_LMB
 /*
  * Logical memory blocks.
  *
@@ -144,6 +145,8 @@ static inline unsigned long lmb_region_pages(const struct lmb_region *reg)
 	     region++)
 
 
+#endif /* CONFIG_HAVE_LMB */
+
 #endif /* __KERNEL__ */
 
 #endif /* _LINUX_LMB_H */
-- 
1.6.4.2

[PATCH 06/25] lmb: Add ARCH_DISCARD_LMB to put lmb code to .init

[Yinghai Lu]

So those lmb bits could be released after kernel is booted up.

Arch code could define ARCH_DISCARD_LMB in asm/lmb.h,
__init_lmb will become __init, __initdata_lmb will becom __initdata

x86 code will use that.

if ARCH_DISCARD_LMB is defined, debugfs is not used

-v2: use ARCH_DISCARD_LMB according to Michael Ellerman

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 include/linux/lmb.h |    8 ++++++++
 lib/lmb.c           |   48 ++++++++++++++++++++++++------------------------
 2 files changed, 32 insertions(+), 24 deletions(-)

diff --git a/include/linux/lmb.h b/include/linux/lmb.h
index d529232..5310c7b 100644
--- a/include/linux/lmb.h
+++ b/include/linux/lmb.h
@@ -145,6 +145,14 @@ static inline unsigned long lmb_region_pages(const struct lmb_region *reg)
 	     region++)
 
 
+#ifdef ARCH_DISCARD_LMB
+#define __init_lmb __init
+#define __initdata_lmb __initdata
+#else
+#define __init_lmb
+#define __initdata_lmb
+#endif
+
 #endif /* CONFIG_HAVE_LMB */
 
 #endif /* __KERNEL__ */
diff --git a/lib/lmb.c b/lib/lmb.c
index 2aaeeec..e45e967 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -20,12 +20,12 @@
 #include <linux/seq_file.h>
 #include <linux/lmb.h>
 
-struct lmb lmb;
+struct lmb lmb __initdata_lmb;
 
-int lmb_debug;
-int lmb_can_resize;
-static struct lmb_region lmb_memory_init_regions[INIT_LMB_REGIONS + 1];
-struct lmb_region lmb_reserved_init_regions[INIT_LMB_REGIONS + 1];
+int lmb_debug __initdata_lmb;
+int lmb_can_resize __initdata_lmb;
+static struct lmb_region lmb_memory_init_regions[INIT_LMB_REGIONS + 1] __initdata_lmb;
+struct lmb_region lmb_reserved_init_regions[INIT_LMB_REGIONS + 1] __initdata_lmb;
 
 /* inline so we don't get a warning when pr_debug is compiled out */
 static inline const char *lmb_type_name(struct lmb_type *type)
@@ -42,23 +42,23 @@ static inline const char *lmb_type_name(struct lmb_type *type)
  * Address comparison utilities
  */
 
-static phys_addr_t lmb_align_down(phys_addr_t addr, phys_addr_t size)
+static phys_addr_t __init_lmb lmb_align_down(phys_addr_t addr, phys_addr_t size)
 {
 	return addr & ~(size - 1);
 }
 
-static phys_addr_t lmb_align_up(phys_addr_t addr, phys_addr_t size)
+static phys_addr_t __init_lmb lmb_align_up(phys_addr_t addr, phys_addr_t size)
 {
 	return (addr + (size - 1)) & ~(size - 1);
 }
 
-static unsigned long lmb_addrs_overlap(phys_addr_t base1, phys_addr_t size1,
+static unsigned long __init_lmb lmb_addrs_overlap(phys_addr_t base1, phys_addr_t size1,
 				       phys_addr_t base2, phys_addr_t size2)
 {
 	return ((base1 < (base2 + size2)) && (base2 < (base1 + size1)));
 }
 
-static long lmb_addrs_adjacent(phys_addr_t base1, phys_addr_t size1,
+static long __init_lmb lmb_addrs_adjacent(phys_addr_t base1, phys_addr_t size1,
 			       phys_addr_t base2, phys_addr_t size2)
 {
 	if (base2 == base1 + size1)
@@ -69,7 +69,7 @@ static long lmb_addrs_adjacent(phys_addr_t base1, phys_addr_t size1,
 	return 0;
 }
 
-static long lmb_regions_adjacent(struct lmb_type *type,
+static long __init_lmb lmb_regions_adjacent(struct lmb_type *type,
 				 unsigned long r1, unsigned long r2)
 {
 	phys_addr_t base1 = type->regions[r1].base;
@@ -80,7 +80,7 @@ static long lmb_regions_adjacent(struct lmb_type *type,
 	return lmb_addrs_adjacent(base1, size1, base2, size2);
 }
 
-long lmb_overlaps_region(struct lmb_type *type, phys_addr_t base, phys_addr_t size)
+long __init_lmb lmb_overlaps_region(struct lmb_type *type, phys_addr_t base, phys_addr_t size)
 {
 	unsigned long i;
 
@@ -156,7 +156,7 @@ static phys_addr_t __init lmb_find_base(phys_addr_t size, phys_addr_t align,
 	return LMB_ERROR;
 }
 
-static void lmb_remove_region(struct lmb_type *type, unsigned long r)
+static void __init_lmb lmb_remove_region(struct lmb_type *type, unsigned long r)
 {
 	unsigned long i;
 
@@ -168,7 +168,7 @@ static void lmb_remove_region(struct lmb_type *type, unsigned long r)
 }
 
 /* Assumption: base addr of region 1 < base addr of region 2 */
-static void lmb_coalesce_regions(struct lmb_type *type,
+static void __init_lmb lmb_coalesce_regions(struct lmb_type *type,
 		unsigned long r1, unsigned long r2)
 {
 	type->regions[r1].size += type->regions[r2].size;
@@ -178,7 +178,7 @@ static void lmb_coalesce_regions(struct lmb_type *type,
 /* Defined below but needed now */
 static long lmb_add_region(struct lmb_type *type, phys_addr_t base, phys_addr_t size);
 
-static int lmb_double_array(struct lmb_type *type)
+static int __init_lmb lmb_double_array(struct lmb_type *type)
 {
 	struct lmb_region *new_array, *old_array;
 	phys_addr_t old_size, new_size, addr;
@@ -250,13 +250,13 @@ static int lmb_double_array(struct lmb_type *type)
 	return 0;
 }
 
-extern int __weak lmb_memory_can_coalesce(phys_addr_t addr1, phys_addr_t size1,
+extern int __init_lmb __weak lmb_memory_can_coalesce(phys_addr_t addr1, phys_addr_t size1,
 					  phys_addr_t addr2, phys_addr_t size2)
 {
 	return 1;
 }
 
-static long lmb_add_region(struct lmb_type *type, phys_addr_t base, phys_addr_t size)
+static long __init_lmb lmb_add_region(struct lmb_type *type, phys_addr_t base, phys_addr_t size)
 {
 	unsigned long coalesced = 0;
 	long adjacent, i;
@@ -343,13 +343,13 @@ static long lmb_add_region(struct lmb_type *type, phys_addr_t base, phys_addr_t
 	return 0;
 }
 
-long lmb_add(phys_addr_t base, phys_addr_t size)
+long __init_lmb lmb_add(phys_addr_t base, phys_addr_t size)
 {
 	return lmb_add_region(&lmb.memory, base, size);
 
 }
 
-static long __lmb_remove(struct lmb_type *type, phys_addr_t base, phys_addr_t size)
+static long __init_lmb __lmb_remove(struct lmb_type *type, phys_addr_t base, phys_addr_t size)
 {
 	phys_addr_t rgnbegin, rgnend;
 	phys_addr_t end = base + size;
@@ -397,7 +397,7 @@ static long __lmb_remove(struct lmb_type *type, phys_addr_t base, phys_addr_t si
 	return lmb_add_region(type, end, rgnend - end);
 }
 
-long lmb_remove(phys_addr_t base, phys_addr_t size)
+long __init_lmb lmb_remove(phys_addr_t base, phys_addr_t size)
 {
 	return __lmb_remove(&lmb.memory, base, size);
 }
@@ -554,7 +554,7 @@ phys_addr_t __init lmb_phys_mem_size(void)
 	return lmb.memory_size;
 }
 
-phys_addr_t lmb_end_of_DRAM(void)
+phys_addr_t __init_lmb lmb_end_of_DRAM(void)
 {
 	int idx = lmb.memory.cnt - 1;
 
@@ -615,7 +615,7 @@ int __init lmb_is_reserved(phys_addr_t addr)
 	return 0;
 }
 
-int lmb_is_region_reserved(phys_addr_t base, phys_addr_t size)
+int __init_lmb lmb_is_region_reserved(phys_addr_t base, phys_addr_t size)
 {
 	return lmb_overlaps_region(&lmb.reserved, base, size);
 }
@@ -626,7 +626,7 @@ void __init lmb_set_current_limit(phys_addr_t limit)
 	lmb.current_limit = limit;
 }
 
-static void lmb_dump(struct lmb_type *region, char *name)
+static void __init_lmb lmb_dump(struct lmb_type *region, char *name)
 {
 	unsigned long long base, size;
 	int i;
@@ -642,7 +642,7 @@ static void lmb_dump(struct lmb_type *region, char *name)
 	}
 }
 
-void lmb_dump_all(void)
+void __init_lmb lmb_dump_all(void)
 {
 	if (!lmb_debug)
 		return;
@@ -708,7 +708,7 @@ static int __init early_lmb(char *p)
 }
 early_param("lmb", early_lmb);
 
-#ifdef CONFIG_DEBUG_FS
+#if defined(CONFIG_DEBUG_FS) && !defined(ARCH_DISCARD_LMB)
 
 static int lmb_debug_show(struct seq_file *m, void *private)
 {
-- 
1.6.4.2

[PATCH 07/25] lmb: Add lmb_find_in_range()

[Yinghai Lu]

it is a wrapper for lmb_find_base

make it more easy for x86 to use lmb. ( rebase )
x86 early_res is using find/reserve pattern instead of alloc.

keep it in weak version, so later We can use x86 own version if needed.
also We need it in lib/lmb.c, so one caller mm/page_alloc.c could get compiled

-v2: Change name to lmb_find_in_range() according to Michael Ellerman
-v3: Add generic weak version __lmb_find_in_range()
     so keep the path for fallback to x86 version that handle from low
-v4: use 0 for failing path
-v5: use LMB_ERROR again
-v6: remove __lmb_find_in_range()

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 include/linux/lmb.h |    2 ++
 lib/lmb.c           |    8 ++++++++
 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/include/linux/lmb.h b/include/linux/lmb.h
index 5310c7b..6ca5659 100644
--- a/include/linux/lmb.h
+++ b/include/linux/lmb.h
@@ -45,6 +45,8 @@ extern int lmb_debug;
 extern int lmb_can_resize;
 extern struct lmb_region lmb_reserved_init_regions[];
 
+u64 lmb_find_in_range(u64 start, u64 end, u64 size, u64 align);
+
 extern void __init lmb_init(void);
 extern void __init lmb_analyze(void);
 extern long lmb_add(phys_addr_t base, phys_addr_t size);
diff --git a/lib/lmb.c b/lib/lmb.c
index e45e967..2e00159 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -156,6 +156,14 @@ static phys_addr_t __init lmb_find_base(phys_addr_t size, phys_addr_t align,
 	return LMB_ERROR;
 }
 
+/*
+ * Find a free area with specified alignment in a specific range.
+ */
+u64 __init __weak lmb_find_in_range(u64 start, u64 end, u64 size, u64 align)
+{
+	return lmb_find_base(size, align, start, end);
+}
+
 static void __init_lmb lmb_remove_region(struct lmb_type *type, unsigned long r)
 {
 	unsigned long i;
-- 
1.6.4.2

[PATCH 08/25] x86, lmb: Add lmb_find_in_range_size()

[Yinghai Lu]

size is returned according free range.
Will be used to find free ranges for early_memtest and memory corruption check

Do not mess it up with lib/lmb.c yet.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/include/asm/lmb.h |    8 ++++
 arch/x86/mm/Makefile       |    2 +
 arch/x86/mm/lmb.c          |   88 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 98 insertions(+), 0 deletions(-)
 create mode 100644 arch/x86/include/asm/lmb.h
 create mode 100644 arch/x86/mm/lmb.c

diff --git a/arch/x86/include/asm/lmb.h b/arch/x86/include/asm/lmb.h
new file mode 100644
index 0000000..9d26895
--- /dev/null
+++ b/arch/x86/include/asm/lmb.h
@@ -0,0 +1,8 @@
+#ifndef _X86_LMB_H
+#define _X86_LMB_H
+
+#define ARCH_DISCARD_LMB
+
+u64 lmb_find_in_range_size(u64 start, u64 *sizep, u64 align);
+
+#endif
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index a4c7683..8ab0505 100644
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -26,4 +26,6 @@ obj-$(CONFIG_NUMA)		+= numa.o numa_$(BITS).o
 obj-$(CONFIG_K8_NUMA)		+= k8topology_64.o
 obj-$(CONFIG_ACPI_NUMA)		+= srat_$(BITS).o
 
+obj-$(CONFIG_HAVE_LMB)		+= lmb.o
+
 obj-$(CONFIG_MEMTEST)		+= memtest.o
diff --git a/arch/x86/mm/lmb.c b/arch/x86/mm/lmb.c
new file mode 100644
index 0000000..4335f48
--- /dev/null
+++ b/arch/x86/mm/lmb.c
@@ -0,0 +1,88 @@
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <linux/lmb.h>
+#include <linux/bootmem.h>
+#include <linux/mm.h>
+#include <linux/range.h>
+
+/* Check for already reserved areas */
+static inline bool __init bad_addr_size(u64 *addrp, u64 *sizep, u64 align)
+{
+	struct lmb_region *r;
+	u64 addr = *addrp, last;
+	u64 size = *sizep;
+	bool changed = false;
+
+again:
+	last = addr + size;
+	for_each_lmb(reserved, r) {
+		if (last > r->base && addr < r->base) {
+			size = r->base - addr;
+			changed = true;
+			goto again;
+		}
+		if (last > (r->base + r->size) && addr < (r->base + r->size)) {
+			addr = round_up(r->base + r->size, align);
+			size = last - addr;
+			changed = true;
+			goto again;
+		}
+		if (last <= (r->base + r->size) && addr >= r->base) {
+			(*sizep)++;
+			return false;
+		}
+	}
+	if (changed) {
+		*addrp = addr;
+		*sizep = size;
+	}
+	return changed;
+}
+
+static u64 __init __lmb_find_in_range_size(u64 ei_start, u64 ei_last, u64 start,
+			 u64 *sizep, u64 align)
+{
+	u64 addr, last;
+
+	addr = round_up(ei_start, align);
+	if (addr < start)
+		addr = round_up(start, align);
+	if (addr >= ei_last)
+		goto out;
+	*sizep = ei_last - addr;
+	while (bad_addr_size(&addr, sizep, align) && addr + *sizep <= ei_last)
+		;
+	last = addr + *sizep;
+	if (last > ei_last)
+		goto out;
+
+	return addr;
+
+out:
+	return LMB_ERROR;
+}
+
+/*
+ * Find next free range after start, and size is returned in *sizep
+ */
+u64 __init lmb_find_in_range_size(u64 start, u64 *sizep, u64 align)
+{
+	struct lmb_region *r;
+
+	for_each_lmb(memory, r) {
+		u64 ei_start = r->base;
+		u64 ei_last = ei_start + r->size;
+		u64 addr;
+
+		addr = __lmb_find_in_range_size(ei_start, ei_last, start,
+					 sizep, align);
+
+		if (addr != LMB_ERROR)
+			return addr;
+	}
+
+	return LMB_ERROR;
+}
+
-- 
1.6.4.2

[PATCH 09/25] bootmem, x86: Add weak version of reserve_bootmem_generic

[Yinghai Lu]

It will be used lmb_to_bootmem converting

It is an wrapper for reserve_bootmem, and x86 64bit is using special one.

Also clean up that version for x86_64. We don't need to take care of numa
path for that, bootmem can handle it how

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/mm/init_32.c |    6 ------
 arch/x86/mm/init_64.c |   20 ++------------------
 mm/bootmem.c          |    6 ++++++
 3 files changed, 8 insertions(+), 24 deletions(-)

diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index bca7909..90e0545 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -1069,9 +1069,3 @@ void mark_rodata_ro(void)
 #endif
 }
 #endif
-
-int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
-				   int flags)
-{
-	return reserve_bootmem(phys, len, flags);
-}
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index ee41bba..634fa08 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -799,13 +799,10 @@ void mark_rodata_ro(void)
 
 #endif
 
+#ifndef CONFIG_NO_BOOTMEM
 int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
 				   int flags)
 {
-#ifdef CONFIG_NUMA
-	int nid, next_nid;
-	int ret;
-#endif
 	unsigned long pfn = phys >> PAGE_SHIFT;
 
 	if (pfn >= max_pfn) {
@@ -821,21 +818,7 @@ int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
 		return -EFAULT;
 	}
 
-	/* Should check here against the e820 map to avoid double free */
-#ifdef CONFIG_NUMA
-	nid = phys_to_nid(phys);
-	next_nid = phys_to_nid(phys + len - 1);
-	if (nid == next_nid)
-		ret = reserve_bootmem_node(NODE_DATA(nid), phys, len, flags);
-	else
-		ret = reserve_bootmem(phys, len, flags);
-
-	if (ret != 0)
-		return ret;
-
-#else
 	reserve_bootmem(phys, len, flags);
-#endif
 
 	if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) {
 		dma_reserve += len / PAGE_SIZE;
@@ -844,6 +827,7 @@ int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
 
 	return 0;
 }
+#endif
 
 int kern_addr_valid(unsigned long addr)
 {
diff --git a/mm/bootmem.c b/mm/bootmem.c
index 58c66cc..ee31b95 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -526,6 +526,12 @@ int __init reserve_bootmem(unsigned long addr, unsigned long size,
 }
 
 #ifndef CONFIG_NO_BOOTMEM
+int __weak __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
+				   int flags)
+{
+	return reserve_bootmem(phys, len, flags);
+}
+
 static unsigned long __init align_idx(struct bootmem_data *bdata,
 				      unsigned long idx, unsigned long step)
 {
-- 
1.6.4.2

[PATCH 10/25] x86, lmb: Add lmb_to_bootmem()

[Yinghai Lu]

lmb_to_bootmem() will reserve lmb.reserved.region in bootmem after bootmem is
set up.

We can use it to with all arches that support lmb later.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/include/asm/lmb.h |    1 +
 arch/x86/mm/lmb.c          |   30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/lmb.h b/arch/x86/include/asm/lmb.h
index 9d26895..e8207f8 100644
--- a/arch/x86/include/asm/lmb.h
+++ b/arch/x86/include/asm/lmb.h
@@ -4,5 +4,6 @@
 #define ARCH_DISCARD_LMB
 
 u64 lmb_find_in_range_size(u64 start, u64 *sizep, u64 align);
+void lmb_to_bootmem(u64 start, u64 end);
 
 #endif
diff --git a/arch/x86/mm/lmb.c b/arch/x86/mm/lmb.c
index 4335f48..a959699 100644
--- a/arch/x86/mm/lmb.c
+++ b/arch/x86/mm/lmb.c
@@ -86,3 +86,33 @@ u64 __init lmb_find_in_range_size(u64 start, u64 *sizep, u64 align)
 	return LMB_ERROR;
 }
 
+#ifndef CONFIG_NO_BOOTMEM
+void __init lmb_to_bootmem(u64 start, u64 end)
+{
+	int count;
+	u64 final_start, final_end;
+	struct lmb_region *r;
+
+	/* Take out region array itself */
+	if (lmb.reserved.regions != lmb_reserved_init_regions)
+		lmb_free(__pa(lmb.reserved.regions), sizeof(struct lmb_region) * lmb.reserved.max);
+
+	count  = lmb.reserved.cnt;
+	pr_info("(%d early reservations) ==> bootmem [%010llx - %010llx]\n", count, start, end);
+	for_each_lmb(reserved, r) {
+		pr_info("  [%010llx - %010llx] ", (u64)r->base, (u64)r->base + r->size);
+		final_start = max(start, r->base);
+		final_end = min(end, r->base + r->size);
+		if (final_start >= final_end) {
+			pr_cont("\n");
+			continue;
+		}
+		pr_cont(" ==> [%010llx - %010llx]\n", final_start, final_end);
+		reserve_bootmem_generic(final_start, final_end - final_start, BOOTMEM_DEFAULT);
+	}
+
+	/* Put region array back ? */
+	if (lmb.reserved.regions != lmb_reserved_init_regions)
+		lmb_reserve(__pa(lmb.reserved.regions), sizeof(struct lmb_region) * lmb.reserved.max);
+}
+#endif
-- 
1.6.4.2

[PATCH 11/25] x86,lmb: Add lmb_reserve_range/lmb_free_range

[Yinghai Lu]

they are wrappers for core versions.
they are taking start/end/name instead of base/size.
will make x86 conversion more easy

could add more debug print out

-v2: change get_max_mapped() to lmb.default_alloc_limit according to Michael
      Ellerman and Ben
     change to lmb_reserve_range and lmb_free_range according to Michael Ellerman
-v3: call check_and_double after reserve/free, so could avoid to use
      find_lmb_area. Suggested by Michael Ellerman

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/include/asm/lmb.h |    3 +++
 arch/x86/mm/lmb.c          |   22 ++++++++++++++++++++++
 2 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/lmb.h b/arch/x86/include/asm/lmb.h
index e8207f8..70df84f 100644
--- a/arch/x86/include/asm/lmb.h
+++ b/arch/x86/include/asm/lmb.h
@@ -6,4 +6,7 @@
 u64 lmb_find_in_range_size(u64 start, u64 *sizep, u64 align);
 void lmb_to_bootmem(u64 start, u64 end);
 
+void lmb_reserve_range(u64 start, u64 end, char *name);
+void lmb_free_range(u64 start, u64 end);
+
 #endif
diff --git a/arch/x86/mm/lmb.c b/arch/x86/mm/lmb.c
index a959699..6b6cc58 100644
--- a/arch/x86/mm/lmb.c
+++ b/arch/x86/mm/lmb.c
@@ -116,3 +116,25 @@ void __init lmb_to_bootmem(u64 start, u64 end)
 		lmb_reserve(__pa(lmb.reserved.regions), sizeof(struct lmb_region) * lmb.reserved.max);
 }
 #endif
+
+void __init lmb_reserve_range(u64 start, u64 end, char *name)
+{
+	if (start == end)
+		return;
+
+	if (WARN_ONCE(start > end, "lmb_reserve_range: wrong range [%#llx, %#llx]\n", start, end))
+		return;
+
+	lmb_reserve(start, end - start);
+}
+
+void __init lmb_free_range(u64 start, u64 end)
+{
+	if (start == end)
+		return;
+
+	if (WARN_ONCE(start > end, "lmb_free_range: wrong range [%#llx, %#llx]\n", start, end))
+		return;
+
+	lmb_free(start, end - start);
+}
-- 
1.6.4.2

[PATCH 12/25] x86, lmb: Add get_free_all_memory_range()

[Yinghai Lu]

get_free_all_memory_range is for CONFIG_NO_BOOTMEM=y, and will be called by
free_all_memory_core_early().

It will use early_node_map aka active ranges subtract lmb.reserved to
get all free range, and those ranges will convert to slab pages.

-v4: increase range size

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Jan Beulich <jbeulich@novell.com>
---
 arch/x86/include/asm/lmb.h |    2 +
 arch/x86/mm/lmb.c          |  102 +++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 103 insertions(+), 1 deletions(-)

diff --git a/arch/x86/include/asm/lmb.h b/arch/x86/include/asm/lmb.h
index 70df84f..63bb597 100644
--- a/arch/x86/include/asm/lmb.h
+++ b/arch/x86/include/asm/lmb.h
@@ -8,5 +8,7 @@ void lmb_to_bootmem(u64 start, u64 end);
 
 void lmb_reserve_range(u64 start, u64 end, char *name);
 void lmb_free_range(u64 start, u64 end);
+struct range;
+int get_free_all_memory_range(struct range **rangep, int nodeid);
 
 #endif
diff --git a/arch/x86/mm/lmb.c b/arch/x86/mm/lmb.c
index 6b6cc58..3954103 100644
--- a/arch/x86/mm/lmb.c
+++ b/arch/x86/mm/lmb.c
@@ -86,7 +86,107 @@ u64 __init lmb_find_in_range_size(u64 start, u64 *sizep, u64 align)
 	return LMB_ERROR;
 }
 
-#ifndef CONFIG_NO_BOOTMEM
+static __init struct range *find_range_array(int count)
+{
+	u64 end, size, mem;
+	struct range *range;
+
+	size = sizeof(struct range) * count;
+	end = lmb.current_limit;
+
+	mem = lmb_find_in_range(0, end, size, sizeof(struct range));
+	if (mem == LMB_ERROR)
+		panic("can not find more space for range array");
+
+	/*
+	 * This range is tempoaray, so don't reserve it, it will not be
+	 * overlapped because We will not alloccate new buffer before
+	 * We discard this one
+	 */
+	range = __va(mem);
+	memset(range, 0, size);
+
+	return range;
+}
+
+#ifdef CONFIG_NO_BOOTMEM
+static void __init subtract_lmb_reserved(struct range *range, int az)
+{
+	int count;
+	u64 final_start, final_end;
+	struct lmb_region *r;
+
+	/* Take out region array itself at first*/
+	if (lmb.reserved.regions != lmb_reserved_init_regions)
+		lmb_free(__pa(lmb.reserved.regions), sizeof(struct lmb_region) * lmb.reserved.max);
+
+	count  = lmb.reserved.cnt;
+
+	pr_info("Subtract (%d early reservations)\n", count);
+
+	for_each_lmb(reserved, r) {
+		pr_info("  [%010llx - %010llx]\n", (u64)r->base, (u64)r->base + r->size);
+		final_start = PFN_DOWN(r->base);
+		final_end = PFN_UP(r->base + r->size);
+		if (final_start >= final_end)
+			continue;
+		subtract_range(range, az, final_start, final_end);
+	}
+	/* Put region array back ? */
+	if (lmb.reserved.regions != lmb_reserved_init_regions)
+		lmb_reserve(__pa(lmb.reserved.regions), sizeof(struct lmb_region) * lmb.reserved.max);
+}
+
+struct count_data {
+	int nr;
+};
+
+static int __init count_work_fn(unsigned long start_pfn,
+				unsigned long end_pfn, void *datax)
+{
+	struct count_data *data = datax;
+
+	data->nr++;
+
+	return 0;
+}
+
+static int __init count_early_node_map(int nodeid)
+{
+	struct count_data data;
+
+	data.nr = 0;
+	work_with_active_regions(nodeid, count_work_fn, &data);
+
+	return data.nr;
+}
+
+int __init get_free_all_memory_range(struct range **rangep, int nodeid)
+{
+	int count;
+	struct range *range;
+	int nr_range;
+
+	count = (lmb.reserved.cnt + count_early_node_map(nodeid)) * 2;
+
+	range = find_range_array(count);
+	nr_range = 0;
+
+	/*
+	 * Use early_node_map[] and lmb.reserved.region to get range array
+	 * at first
+	 */
+	nr_range = add_from_early_node_map(range, count, nr_range, nodeid);
+#ifdef CONFIG_X86_32
+	subtract_range(range, count, max_low_pfn, -1ULL);
+#endif
+	subtract_lmb_reserved(range, count);
+	nr_range = clean_sort_range(range, count);
+
+	*rangep = range;
+	return nr_range;
+}
+#else
 void __init lmb_to_bootmem(u64 start, u64 end)
 {
 	int count;
-- 
1.6.4.2

[PATCH 13/25] x86, lmb: Add lmb_register_active_regions() and lmb_hole_size()

[Yinghai Lu]

lmb_register_active_regions() will be used to fill early_node_map,
the result will be lmb.memory.region AND numa data

lmb_hole_size will be used to find hole size on lmb.memory.region
with specified range.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/include/asm/lmb.h |    4 ++
 arch/x86/mm/lmb.c          |   67 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 71 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/lmb.h b/arch/x86/include/asm/lmb.h
index 63bb597..763fb52 100644
--- a/arch/x86/include/asm/lmb.h
+++ b/arch/x86/include/asm/lmb.h
@@ -11,4 +11,8 @@ void lmb_free_range(u64 start, u64 end);
 struct range;
 int get_free_all_memory_range(struct range **rangep, int nodeid);
 
+void lmb_register_active_regions(int nid, unsigned long start_pfn,
+					 unsigned long last_pfn);
+u64 lmb_hole_size(u64 start, u64 end);
+
 #endif
diff --git a/arch/x86/mm/lmb.c b/arch/x86/mm/lmb.c
index 3954103..b7e42bc 100644
--- a/arch/x86/mm/lmb.c
+++ b/arch/x86/mm/lmb.c
@@ -238,3 +238,70 @@ void __init lmb_free_range(u64 start, u64 end)
 
 	lmb_free(start, end - start);
 }
+
+/*
+ * Finds an active region in the address range from start_pfn to last_pfn and
+ * returns its range in ei_startpfn and ei_endpfn for the lmb entry.
+ */
+static int __init lmb_find_active_region(const struct lmb_region *ei,
+				  unsigned long start_pfn,
+				  unsigned long last_pfn,
+				  unsigned long *ei_startpfn,
+				  unsigned long *ei_endpfn)
+{
+	u64 align = PAGE_SIZE;
+
+	*ei_startpfn = round_up(ei->base, align) >> PAGE_SHIFT;
+	*ei_endpfn = round_down(ei->base + ei->size, align) >> PAGE_SHIFT;
+
+	/* Skip map entries smaller than a page */
+	if (*ei_startpfn >= *ei_endpfn)
+		return 0;
+
+	/* Skip if map is outside the node */
+	if (*ei_endpfn <= start_pfn || *ei_startpfn >= last_pfn)
+		return 0;
+
+	/* Check for overlaps */
+	if (*ei_startpfn < start_pfn)
+		*ei_startpfn = start_pfn;
+	if (*ei_endpfn > last_pfn)
+		*ei_endpfn = last_pfn;
+
+	return 1;
+}
+
+/* Walk the lmb.memory map and register active regions within a node */
+void __init lmb_register_active_regions(int nid, unsigned long start_pfn,
+					 unsigned long last_pfn)
+{
+	unsigned long ei_startpfn;
+	unsigned long ei_endpfn;
+	struct lmb_region *r;
+
+	for_each_lmb(memory, r)
+		if (lmb_find_active_region(r, start_pfn, last_pfn,
+					   &ei_startpfn, &ei_endpfn))
+			add_active_range(nid, ei_startpfn, ei_endpfn);
+}
+
+/*
+ * Find the hole size (in bytes) in the memory range.
+ * @start: starting address of the memory range to scan
+ * @end: ending address of the memory range to scan
+ */
+u64 __init lmb_hole_size(u64 start, u64 end)
+{
+	unsigned long start_pfn = start >> PAGE_SHIFT;
+	unsigned long last_pfn = end >> PAGE_SHIFT;
+	unsigned long ei_startpfn, ei_endpfn, ram = 0;
+	struct lmb_region *r;
+
+	for_each_lmb(memory, r)
+		if (lmb_find_active_region(r, start_pfn, last_pfn,
+					   &ei_startpfn, &ei_endpfn))
+			ram += ei_endpfn - ei_startpfn;
+
+	return end - start - ((u64)ram << PAGE_SHIFT);
+}
+
-- 
1.6.4.2

[PATCH 14/25] lmb: Add find_memory_core_early()

[Yinghai Lu]

According to node range in early_node_map[] with __lmb_find_in_range
to find free range.

Will be used by lmb_find_in_range_node()

lmb_find_in_range_node will be used to find right buffer for NODE_DATA

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 include/linux/mm.h |    2 ++
 mm/page_alloc.c    |   36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 0 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 4238a9c..a85bb08 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1164,6 +1164,8 @@ extern void free_bootmem_with_active_regions(int nid,
 						unsigned long max_low_pfn);
 int add_from_early_node_map(struct range *range, int az,
 				   int nr_range, int nid);
+u64 __init find_memory_core_early(int nid, u64 size, u64 align,
+					u64 goal, u64 limit);
 void *__alloc_memory_core_early(int nodeid, u64 size, u64 align,
 				 u64 goal, u64 limit);
 typedef int (*work_fn_t)(unsigned long, unsigned long, void *);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 431214b..37f30fc 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -21,6 +21,7 @@
 #include <linux/pagemap.h>
 #include <linux/jiffies.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 #include <linux/compiler.h>
 #include <linux/kernel.h>
 #include <linux/kmemcheck.h>
@@ -3612,6 +3613,41 @@ void __init free_bootmem_with_active_regions(int nid,
 	}
 }
 
+#ifdef CONFIG_HAVE_LMB
+u64 __init find_memory_core_early(int nid, u64 size, u64 align,
+					u64 goal, u64 limit)
+{
+	int i;
+
+	/* Need to go over early_node_map to find out good range for node */
+	for_each_active_range_index_in_nid(i, nid) {
+		u64 addr;
+		u64 ei_start, ei_last;
+		u64 final_start, final_end;
+
+		ei_last = early_node_map[i].end_pfn;
+		ei_last <<= PAGE_SHIFT;
+		ei_start = early_node_map[i].start_pfn;
+		ei_start <<= PAGE_SHIFT;
+
+	        final_start = max(ei_start, goal);
+		final_end = min(ei_last, limit);
+
+	        if (final_start >= final_end)
+			continue;
+
+		addr = lmb_find_in_range(final_start, final_end, size, align);
+
+		if (addr == LMB_ERROR)
+			continue;
+
+		return addr;
+	}
+
+	return LMB_ERROR;
+}
+#endif
+
 int __init add_from_early_node_map(struct range *range, int az,
 				   int nr_range, int nid)
 {
-- 
1.6.4.2

[PATCH 15/25] x86, lmb: Add lmb_find_in_range_node()

[Yinghai Lu]

It can be used to find NODE_DATA for numa.

Need to make sure early_node_map[] is filled before it is called, otherwise
it will fallback to lmb_find_in_range(), with node range.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/include/asm/lmb.h |    1 +
 arch/x86/mm/lmb.c          |   15 +++++++++++++++
 2 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/lmb.h b/arch/x86/include/asm/lmb.h
index 763fb52..02fe25d 100644
--- a/arch/x86/include/asm/lmb.h
+++ b/arch/x86/include/asm/lmb.h
@@ -14,5 +14,6 @@ int get_free_all_memory_range(struct range **rangep, int nodeid);
 void lmb_register_active_regions(int nid, unsigned long start_pfn,
 					 unsigned long last_pfn);
 u64 lmb_hole_size(u64 start, u64 end);
+u64 lmb_find_in_range_node(int nid, u64 start, u64 end, u64 size, u64 align);
 
 #endif
diff --git a/arch/x86/mm/lmb.c b/arch/x86/mm/lmb.c
index b7e42bc..399d223 100644
--- a/arch/x86/mm/lmb.c
+++ b/arch/x86/mm/lmb.c
@@ -240,6 +240,21 @@ void __init lmb_free_range(u64 start, u64 end)
 }
 
 /*
+ * Need to call this function after lmb_register_active_regions,
+ * so early_node_map[] is filled already.
+ */
+u64 __init lmb_find_in_range_node(int nid, u64 start, u64 end, u64 size, u64 align)
+{
+	u64 addr;
+	addr = find_memory_core_early(nid, size, align, start, end);
+	if (addr != LMB_ERROR)
+		return addr;
+
+	/* Fallback, should already have start end within node range */
+	return lmb_find_in_range(start, end, size, align);
+}
+
+/*
  * Finds an active region in the address range from start_pfn to last_pfn and
  * returns its range in ei_startpfn and ei_endpfn for the lmb entry.
  */
-- 
1.6.4.2

[PATCH 16/25] x86, lmb: Add lmb_free_memory_in_range()

[Yinghai Lu]

It will return free memory size in specified range.

We can not use memory_size - reserved_size here, because some reserved area
may not be in the scope of lmb.memory.region.

Use lmb.memory.region subtracting lmb.reserved.region to get free range array.
then count size of all free ranges.

-v2: Ben insist on using _in_range

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/include/asm/lmb.h |    1 +
 arch/x86/mm/lmb.c          |   48 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/lmb.h b/arch/x86/include/asm/lmb.h
index 02fe25d..3a304f8 100644
--- a/arch/x86/include/asm/lmb.h
+++ b/arch/x86/include/asm/lmb.h
@@ -15,5 +15,6 @@ void lmb_register_active_regions(int nid, unsigned long start_pfn,
 					 unsigned long last_pfn);
 u64 lmb_hole_size(u64 start, u64 end);
 u64 lmb_find_in_range_node(int nid, u64 start, u64 end, u64 size, u64 align);
+u64 lmb_free_memory_in_range(u64 addr, u64 limit);
 
 #endif
diff --git a/arch/x86/mm/lmb.c b/arch/x86/mm/lmb.c
index 399d223..991dd55 100644
--- a/arch/x86/mm/lmb.c
+++ b/arch/x86/mm/lmb.c
@@ -217,6 +217,54 @@ void __init lmb_to_bootmem(u64 start, u64 end)
 }
 #endif
 
+u64 __init lmb_free_memory_in_range(u64 addr, u64 limit)
+{
+	int i, count;
+	struct range *range;
+	int nr_range;
+	u64 final_start, final_end;
+	u64 free_size;
+	struct lmb_region *r;
+
+	count = (lmb.reserved.cnt + lmb.memory.cnt) * 2;
+
+	range = find_range_array(count);
+	nr_range = 0;
+
+	addr = PFN_UP(addr);
+	limit = PFN_DOWN(limit);
+
+	for_each_lmb(memory, r) {
+		final_start = PFN_UP(r->base);
+		final_end = PFN_DOWN(r->base + r->size);
+		if (final_start >= final_end)
+			continue;
+		if (final_start >= limit || final_end <= addr)
+			continue;
+
+		nr_range = add_range(range, count, nr_range, final_start, final_end);
+	}
+	subtract_range(range, count, 0, addr);
+	subtract_range(range, count, limit, -1ULL);
+	for_each_lmb(reserved, r) {
+		final_start = PFN_DOWN(r->base);
+		final_end = PFN_UP(r->base + r->size);
+		if (final_start >= final_end)
+			continue;
+		if (final_start >= limit || final_end <= addr)
+			continue;
+
+		subtract_range(range, count, final_start, final_end);
+	}
+	nr_range = clean_sort_range(range, count);
+
+	free_size = 0;
+	for (i = 0; i < nr_range; i++)
+		free_size += range[i].end - range[i].start;
+
+	return free_size << PAGE_SHIFT;
+}
+
 void __init lmb_reserve_range(u64 start, u64 end, char *name)
 {
 	if (start == end)
-- 
1.6.4.2

[PATCH 17/25] x86, lmb: Add lmb_memory_in_range()

[Yinghai Lu]

It will return memory size in specified range according to lmb.memory.region

Try to share some code with lmb_free_memory_in_range() by passing get_free to
__lmb_memory_in_range().

-v2: Ben want _in_range in the name instead of size

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/include/asm/lmb.h |    1 +
 arch/x86/mm/lmb.c          |   18 +++++++++++++++++-
 2 files changed, 18 insertions(+), 1 deletions(-)

diff --git a/arch/x86/include/asm/lmb.h b/arch/x86/include/asm/lmb.h
index 3a304f8..749c224 100644
--- a/arch/x86/include/asm/lmb.h
+++ b/arch/x86/include/asm/lmb.h
@@ -16,5 +16,6 @@ void lmb_register_active_regions(int nid, unsigned long start_pfn,
 u64 lmb_hole_size(u64 start, u64 end);
 u64 lmb_find_in_range_node(int nid, u64 start, u64 end, u64 size, u64 align);
 u64 lmb_free_memory_in_range(u64 addr, u64 limit);
+u64 lmb_memory_in_range(u64 addr, u64 limit);
 
 #endif
diff --git a/arch/x86/mm/lmb.c b/arch/x86/mm/lmb.c
index 991dd55..bd2f60b 100644
--- a/arch/x86/mm/lmb.c
+++ b/arch/x86/mm/lmb.c
@@ -217,7 +217,7 @@ void __init lmb_to_bootmem(u64 start, u64 end)
 }
 #endif
 
-u64 __init lmb_free_memory_in_range(u64 addr, u64 limit)
+static u64 __init __lmb_memory_in_range(u64 addr, u64 limit, bool get_free)
 {
 	int i, count;
 	struct range *range;
@@ -246,6 +246,10 @@ u64 __init lmb_free_memory_in_range(u64 addr, u64 limit)
 	}
 	subtract_range(range, count, 0, addr);
 	subtract_range(range, count, limit, -1ULL);
+
+	/* Subtract lmb.reserved.region in range ? */
+	if (!get_free)
+		goto sort_and_count_them;
 	for_each_lmb(reserved, r) {
 		final_start = PFN_DOWN(r->base);
 		final_end = PFN_UP(r->base + r->size);
@@ -256,6 +260,8 @@ u64 __init lmb_free_memory_in_range(u64 addr, u64 limit)
 
 		subtract_range(range, count, final_start, final_end);
 	}
+
+sort_and_count_them:
 	nr_range = clean_sort_range(range, count);
 
 	free_size = 0;
@@ -265,6 +271,16 @@ u64 __init lmb_free_memory_in_range(u64 addr, u64 limit)
 	return free_size << PAGE_SHIFT;
 }
 
+u64 __init lmb_free_memory_in_range(u64 addr, u64 limit)
+{
+	return __lmb_memory_in_range(addr, limit, true);
+}
+
+u64 __init lmb_memory_in_range(u64 addr, u64 limit)
+{
+	return __lmb_memory_in_range(addr, limit, false);
+}
+
 void __init lmb_reserve_range(u64 start, u64 end, char *name)
 {
 	if (start == end)
-- 
1.6.4.2

[PATCH 18/25] x86, lmb: Use lmb_debug to control debug message print out

[Yinghai Lu]

Also let lmb_reserve_range/lmb_free_range could print out name if lmb=debug is
specified

will also print ther name when reserve_lmb_area/free_lmb_area are called.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/mm/lmb.c |   24 ++++++++++++++++++------
 1 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/arch/x86/mm/lmb.c b/arch/x86/mm/lmb.c
index bd2f60b..209f25b 100644
--- a/arch/x86/mm/lmb.c
+++ b/arch/x86/mm/lmb.c
@@ -122,10 +122,12 @@ static void __init subtract_lmb_reserved(struct range *range, int az)
 
 	count  = lmb.reserved.cnt;
 
-	pr_info("Subtract (%d early reservations)\n", count);
+	if (lmb_debug)
+		pr_info("Subtract (%d early reservations)\n", count);
 
 	for_each_lmb(reserved, r) {
-		pr_info("  [%010llx - %010llx]\n", (u64)r->base, (u64)r->base + r->size);
+		if (lmb_debug)
+			pr_info("  [%010llx - %010llx]\n", (u64)r->base, (u64)r->base + r->size);
 		final_start = PFN_DOWN(r->base);
 		final_end = PFN_UP(r->base + r->size);
 		if (final_start >= final_end)
@@ -198,16 +200,20 @@ void __init lmb_to_bootmem(u64 start, u64 end)
 		lmb_free(__pa(lmb.reserved.regions), sizeof(struct lmb_region) * lmb.reserved.max);
 
 	count  = lmb.reserved.cnt;
-	pr_info("(%d early reservations) ==> bootmem [%010llx - %010llx]\n", count, start, end);
+	if (lmb_debug)
+		pr_info("(%d early reservations) ==> bootmem [%010llx - %010llx]\n", count, start, end);
 	for_each_lmb(reserved, r) {
-		pr_info("  [%010llx - %010llx] ", (u64)r->base, (u64)r->base + r->size);
+		if (lmb_debug)
+			pr_info("  [%010llx - %010llx] ", (u64)r->base, (u64)r->base + r->size);
 		final_start = max(start, r->base);
 		final_end = min(end, r->base + r->size);
 		if (final_start >= final_end) {
-			pr_cont("\n");
+			if (lmb_debug)
+				pr_cont("\n");
 			continue;
 		}
-		pr_cont(" ==> [%010llx - %010llx]\n", final_start, final_end);
+		if (lmb_debug)
+			pr_cont(" ==> [%010llx - %010llx]\n", final_start, final_end);
 		reserve_bootmem_generic(final_start, final_end - final_start, BOOTMEM_DEFAULT);
 	}
 
@@ -289,6 +295,9 @@ void __init lmb_reserve_range(u64 start, u64 end, char *name)
 	if (WARN_ONCE(start > end, "lmb_reserve_range: wrong range [%#llx, %#llx]\n", start, end))
 		return;
 
+	if (lmb_debug)
+		pr_info("    lmb_reserve_range: [%010llx, %010llx] %16s\n", start, end, name);
+
 	lmb_reserve(start, end - start);
 }
 
@@ -300,6 +309,9 @@ void __init lmb_free_range(u64 start, u64 end)
 	if (WARN_ONCE(start > end, "lmb_free_range: wrong range [%#llx, %#llx]\n", start, end))
 		return;
 
+	if (lmb_debug)
+		pr_info("       lmb_free_range: [%010llx, %010llx]\n", start, end);
+
 	lmb_free(start, end - start);
 }
 
-- 
1.6.4.2

[PATCH 19/25] x86: Use lmb to replace early_res

[Yinghai Lu]

1. replace find_e820_area with lmb_find_in_range
2. replace reserve_early with lmb_reserve_range
3. replace free_early with lmb_free_range.
4. NO_BOOTMEM will switch to use lmb too.
5. use _e820, _early wrap in the patch, in following patch, will
   replace them all
6. because lmb_free_range support partial free, we can remove some special care
7. Need to make sure that lmb_find_in_range() is called after fill_lmb_memory()
   so adjust some calling later in setup.c::setup_arch()
   -- corruption_check and mptable_update

-v2: Move reserve_brk() early
    Before fill_lmb_area, to avoid overlap between brk and lmb_find_in_range()
    that could happen We have more then 128 RAM entry in E820 tables, and
    fill_lmb_memory() could use lmb_find_in_range() to find a new place for
    lmb.memory.region array.
    and We don't need to use extend_brk() after fill_lmb_area()
    So move reserve_brk() early before fill_lmb_area().
-v3: Move find_smp_config early
    To make sure lmb_find_in_range not find wrong place, if BIOS doesn't put mptable
    in right place.
-v4: Treat RESERVED_KERN as RAM in lmb.memory. and they are already in
    lmb.reserved already..
    use __NOT_KEEP_LMB to make sure lmb related code could be freed later.
-v5: Generic version __lmb_find_in_range() is going from high to low, and for 32bit
    active_region for 32bit does include high pages
    need to replace the limit with lmb.default_alloc_limit, aka get_max_mapped()
-v6: Use current_limit instead
-v7: check with LMB_ERROR instead of -1ULL or -1L
-v8: Set lmb_can_resize early to handle EFI with more RAM entries

Suggested-by: David S. Miller <davem@davemloft.net>
Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/Kconfig               |    9 +--
 arch/x86/include/asm/e820.h    |   15 ++--
 arch/x86/kernel/check.c        |   16 ++--
 arch/x86/kernel/e820.c         |  164 ++++++++++++++--------------------------
 arch/x86/kernel/head.c         |    3 +-
 arch/x86/kernel/head32.c       |    6 +-
 arch/x86/kernel/head64.c       |    3 +
 arch/x86/kernel/mpparse.c      |    5 +-
 arch/x86/kernel/setup.c        |   46 ++++++++---
 arch/x86/kernel/setup_percpu.c |    6 --
 arch/x86/mm/numa_64.c          |    9 +-
 kernel/Makefile                |    1 -
 mm/bootmem.c                   |    1 +
 mm/page_alloc.c                |   36 +++------
 mm/sparse-vmemmap.c            |   11 ---
 15 files changed, 140 insertions(+), 191 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 3069a6d..600ce1a 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -27,6 +27,7 @@ config X86
 	select HAVE_PERF_EVENTS if (!M386 && !M486)
 	select HAVE_IOREMAP_PROT
 	select HAVE_KPROBES
+	select HAVE_LMB
 	select ARCH_WANT_OPTIONAL_GPIOLIB
 	select ARCH_WANT_FRAME_POINTERS
 	select HAVE_DMA_ATTRS
@@ -196,9 +197,6 @@ config ARCH_SUPPORTS_OPTIMIZED_INLINING
 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 	def_bool y
 
-config HAVE_EARLY_RES
-	def_bool y
-
 config HAVE_INTEL_TXT
 	def_bool y
 	depends on EXPERIMENTAL && DMAR && ACPI
@@ -591,14 +589,13 @@ config NO_BOOTMEM
 	default y
 	bool "Disable Bootmem code"
 	---help---
-	  Use early_res directly instead of bootmem before slab is ready.
+	  Use lmb directly instead of bootmem before slab is ready.
 		- allocator (buddy) [generic]
 		- early allocator (bootmem) [generic]
-		- very early allocator (reserve_early*()) [x86]
+		- very early allocator (lmb) [some generic]
 		- very very early allocator (early brk model) [x86]
 	  So reduce one layer between early allocator to final allocator
 
-
 config MEMTEST
 	bool "Memtest"
 	---help---
diff --git a/arch/x86/include/asm/e820.h b/arch/x86/include/asm/e820.h
index ec8a52d..38adac8 100644
--- a/arch/x86/include/asm/e820.h
+++ b/arch/x86/include/asm/e820.h
@@ -117,24 +117,27 @@ extern unsigned long end_user_pfn;
 extern u64 find_e820_area(u64 start, u64 end, u64 size, u64 align);
 extern u64 find_e820_area_size(u64 start, u64 *sizep, u64 align);
 extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align);
-#include <linux/early_res.h>
 
 extern unsigned long e820_end_of_ram_pfn(void);
 extern unsigned long e820_end_of_low_ram_pfn(void);
-extern int e820_find_active_region(const struct e820entry *ei,
-				  unsigned long start_pfn,
-				  unsigned long last_pfn,
-				  unsigned long *ei_startpfn,
-				  unsigned long *ei_endpfn);
 extern void e820_register_active_regions(int nid, unsigned long start_pfn,
 					 unsigned long end_pfn);
 extern u64 e820_hole_size(u64 start, u64 end);
+
+extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align);
+
+void init_lmb_memory(void);
+void fill_lmb_memory(void);
+
 extern void finish_e820_parsing(void);
 extern void e820_reserve_resources(void);
 extern void e820_reserve_resources_late(void);
 extern void setup_memory_map(void);
 extern char *default_machine_specific_memory_setup(void);
 
+void reserve_early(u64 start, u64 end, char *name);
+void free_early(u64 start, u64 end);
+
 /*
  * Returns true iff the specified range [s,e) is completely contained inside
  * the ISA region.
diff --git a/arch/x86/kernel/check.c b/arch/x86/kernel/check.c
index fc999e6..27843ed 100644
--- a/arch/x86/kernel/check.c
+++ b/arch/x86/kernel/check.c
@@ -2,7 +2,8 @@
 #include <linux/sched.h>
 #include <linux/kthread.h>
 #include <linux/workqueue.h>
-#include <asm/e820.h>
+#include <linux/lmb.h>
+
 #include <asm/proto.h>
 
 /*
@@ -18,10 +19,12 @@ static int __read_mostly memory_corruption_check = -1;
 static unsigned __read_mostly corruption_check_size = 64*1024;
 static unsigned __read_mostly corruption_check_period = 60; /* seconds */
 
-static struct e820entry scan_areas[MAX_SCAN_AREAS];
+static struct scan_area {
+	u64 addr;
+	u64 size;
+} scan_areas[MAX_SCAN_AREAS];
 static int num_scan_areas;
 
-
 static __init int set_corruption_check(char *arg)
 {
 	char *end;
@@ -81,9 +84,9 @@ void __init setup_bios_corruption_check(void)
 
 	while (addr < corruption_check_size && num_scan_areas < MAX_SCAN_AREAS) {
 		u64 size;
-		addr = find_e820_area_size(addr, &size, PAGE_SIZE);
+		addr = lmb_find_in_range_size(addr, &size, PAGE_SIZE);
 
-		if (!(addr + 1))
+		if (addr == LMB_ERROR)
 			break;
 
 		if (addr >= corruption_check_size)
@@ -92,7 +95,7 @@ void __init setup_bios_corruption_check(void)
 		if ((addr + size) > corruption_check_size)
 			size = corruption_check_size - addr;
 
-		e820_update_range(addr, size, E820_RAM, E820_RESERVED);
+		lmb_reserve_range(addr, addr + size, "SCAN RAM");
 		scan_areas[num_scan_areas].addr = addr;
 		scan_areas[num_scan_areas].size = size;
 		num_scan_areas++;
@@ -105,7 +108,6 @@ void __init setup_bios_corruption_check(void)
 
 	printk(KERN_INFO "Scanning %d areas for low memory corruption\n",
 	       num_scan_areas);
-	update_e820();
 }
 
 
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 0d6fc71..b4a2301 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -15,6 +15,7 @@
 #include <linux/pfn.h>
 #include <linux/suspend.h>
 #include <linux/firmware-map.h>
+#include <linux/lmb.h>
 
 #include <asm/e820.h>
 #include <asm/proto.h>
@@ -742,69 +743,29 @@ core_initcall(e820_mark_nvs_memory);
  */
 u64 __init find_e820_area(u64 start, u64 end, u64 size, u64 align)
 {
-	int i;
-
-	for (i = 0; i < e820.nr_map; i++) {
-		struct e820entry *ei = &e820.map[i];
-		u64 addr;
-		u64 ei_start, ei_last;
+	u64 mem = lmb_find_in_range(start, end, size, align);
 
-		if (ei->type != E820_RAM)
-			continue;
-
-		ei_last = ei->addr + ei->size;
-		ei_start = ei->addr;
-		addr = find_early_area(ei_start, ei_last, start, end,
-					 size, align);
-
-		if (addr != -1ULL)
-			return addr;
-	}
-	return -1ULL;
-}
+	if (mem == LMB_ERROR)
+		return -1ULL;
 
-u64 __init find_fw_memmap_area(u64 start, u64 end, u64 size, u64 align)
-{
-	return find_e820_area(start, end, size, align);
+	return mem;
 }
 
-u64 __init get_max_mapped(void)
-{
-	u64 end = max_pfn_mapped;
-
-	end <<= PAGE_SHIFT;
-
-	return end;
-}
 /*
  * Find next free range after *start
  */
 u64 __init find_e820_area_size(u64 start, u64 *sizep, u64 align)
 {
-	int i;
-
-	for (i = 0; i < e820.nr_map; i++) {
-		struct e820entry *ei = &e820.map[i];
-		u64 addr;
-		u64 ei_start, ei_last;
-
-		if (ei->type != E820_RAM)
-			continue;
+	u64 mem = lmb_find_in_range_size(start, sizep, align);
 
-		ei_last = ei->addr + ei->size;
-		ei_start = ei->addr;
-		addr = find_early_area_size(ei_start, ei_last, start,
-					 sizep, align);
+	if (mem == LMB_ERROR)
+		return -1ULL
 
-		if (addr != -1ULL)
-			return addr;
-	}
-
-	return -1ULL;
+	return mem;
 }
 
 /*
- * pre allocated 4k and reserved it in e820
+ * pre allocated 4k and reserved it in lmb and e820_saved
  */
 u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align)
 {
@@ -813,8 +774,8 @@ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align)
 	u64 start;
 
 	for (start = startt; ; start += size) {
-		start = find_e820_area_size(start, &size, align);
-		if (!(start + 1))
+		start = lmb_find_in_range_size(start, &size, align);
+		if (start == LMB_ERROR)
 			return 0;
 		if (size >= sizet)
 			break;
@@ -830,10 +791,9 @@ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align)
 	addr = round_down(start + size - sizet, align);
 	if (addr < start)
 		return 0;
-	e820_update_range(addr, sizet, E820_RAM, E820_RESERVED);
+	lmb_reserve_range(addr, addr + sizet, "new next");
 	e820_update_range_saved(addr, sizet, E820_RAM, E820_RESERVED);
-	printk(KERN_INFO "update e820 for early_reserve_e820\n");
-	update_e820();
+	printk(KERN_INFO "update e820_saved for early_reserve_e820\n");
 	update_e820_saved();
 
 	return addr;
@@ -895,52 +855,12 @@ unsigned long __init e820_end_of_low_ram_pfn(void)
 {
 	return e820_end_pfn(1UL<<(32 - PAGE_SHIFT), E820_RAM);
 }
-/*
- * Finds an active region in the address range from start_pfn to last_pfn and
- * returns its range in ei_startpfn and ei_endpfn for the e820 entry.
- */
-int __init e820_find_active_region(const struct e820entry *ei,
-				  unsigned long start_pfn,
-				  unsigned long last_pfn,
-				  unsigned long *ei_startpfn,
-				  unsigned long *ei_endpfn)
-{
-	u64 align = PAGE_SIZE;
-
-	*ei_startpfn = round_up(ei->addr, align) >> PAGE_SHIFT;
-	*ei_endpfn = round_down(ei->addr + ei->size, align) >> PAGE_SHIFT;
-
-	/* Skip map entries smaller than a page */
-	if (*ei_startpfn >= *ei_endpfn)
-		return 0;
-
-	/* Skip if map is outside the node */
-	if (ei->type != E820_RAM || *ei_endpfn <= start_pfn ||
-				    *ei_startpfn >= last_pfn)
-		return 0;
-
-	/* Check for overlaps */
-	if (*ei_startpfn < start_pfn)
-		*ei_startpfn = start_pfn;
-	if (*ei_endpfn > last_pfn)
-		*ei_endpfn = last_pfn;
-
-	return 1;
-}
 
 /* Walk the e820 map and register active regions within a node */
 void __init e820_register_active_regions(int nid, unsigned long start_pfn,
 					 unsigned long last_pfn)
 {
-	unsigned long ei_startpfn;
-	unsigned long ei_endpfn;
-	int i;
-
-	for (i = 0; i < e820.nr_map; i++)
-		if (e820_find_active_region(&e820.map[i],
-					    start_pfn, last_pfn,
-					    &ei_startpfn, &ei_endpfn))
-			add_active_range(nid, ei_startpfn, ei_endpfn);
+	lmb_register_active_regions(nid, start_pfn, last_pfn);
 }
 
 /*
@@ -950,18 +870,16 @@ void __init e820_register_active_regions(int nid, unsigned long start_pfn,
  */
 u64 __init e820_hole_size(u64 start, u64 end)
 {
-	unsigned long start_pfn = start >> PAGE_SHIFT;
-	unsigned long last_pfn = end >> PAGE_SHIFT;
-	unsigned long ei_startpfn, ei_endpfn, ram = 0;
-	int i;
+	return lmb_hole_size(start, end);
+}
 
-	for (i = 0; i < e820.nr_map; i++) {
-		if (e820_find_active_region(&e820.map[i],
-					    start_pfn, last_pfn,
-					    &ei_startpfn, &ei_endpfn))
-			ram += ei_endpfn - ei_startpfn;
-	}
-	return end - start - ((u64)ram << PAGE_SHIFT);
+void reserve_early(u64 start, u64 end, char *name)
+{
+	lmb_reserve_range(start, end, name);
+}
+void free_early(u64 start, u64 end)
+{
+	lmb_free_range(start, end);
 }
 
 static void early_panic(char *msg)
@@ -1210,3 +1128,37 @@ void __init setup_memory_map(void)
 	printk(KERN_INFO "BIOS-provided physical RAM map:\n");
 	e820_print_map(who);
 }
+
+void __init init_lmb_memory(void)
+{
+	lmb_init();
+}
+
+void __init fill_lmb_memory(void)
+{
+	int i;
+	u64 end;
+
+	/*
+         * EFI may have more than 128 entries
+	 * We are safe to enable resizing, beause fill_lmb_memory()
+	 * is rather later for x86
+	 */
+	lmb_can_resize = 1;
+
+	for (i = 0; i < e820.nr_map; i++) {
+		struct e820entry *ei = &e820.map[i];
+
+		end = ei->addr + ei->size;
+		if (end != (resource_size_t)end)
+			 continue;
+
+		if (ei->type != E820_RAM && ei->type != E820_RESERVED_KERN)
+			continue;
+
+		lmb_add(ei->addr, ei->size);
+	}
+
+	lmb_analyze();
+	lmb_dump_all();
+}
diff --git a/arch/x86/kernel/head.c b/arch/x86/kernel/head.c
index 3e66bd3..1239c9a 100644
--- a/arch/x86/kernel/head.c
+++ b/arch/x86/kernel/head.c
@@ -1,5 +1,6 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/lmb.h>
 
 #include <asm/setup.h>
 #include <asm/bios_ebda.h>
@@ -51,5 +52,5 @@ void __init reserve_ebda_region(void)
 		lowmem = 0x9f000;
 
 	/* reserve all memory between lowmem and the 1MB mark */
-	reserve_early_overlap_ok(lowmem, 0x100000, "BIOS reserved");
+	lmb_reserve_range(lowmem, 0x100000, "* BIOS reserved");
 }
diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c
index b2e2460..d5258e4 100644
--- a/arch/x86/kernel/head32.c
+++ b/arch/x86/kernel/head32.c
@@ -8,6 +8,7 @@
 #include <linux/init.h>
 #include <linux/start_kernel.h>
 #include <linux/mm.h>
+#include <linux/lmb.h>
 
 #include <asm/setup.h>
 #include <asm/sections.h>
@@ -30,14 +31,15 @@ static void __init i386_default_early_setup(void)
 
 void __init i386_start_kernel(void)
 {
+	init_lmb_memory();
+
 #ifdef CONFIG_X86_TRAMPOLINE
 	/*
 	 * But first pinch a few for the stack/trampoline stuff
 	 * FIXME: Don't need the extra page at 4K, but need to fix
 	 * trampoline before removing it. (see the GDT stuff)
 	 */
-	reserve_early_overlap_ok(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE,
-					 "EX TRAMPOLINE");
+	lmb_reserve_range(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, "EX TRAMPOLINE");
 #endif
 
 	reserve_early(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS");
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 7147143..89dd2de 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -12,6 +12,7 @@
 #include <linux/percpu.h>
 #include <linux/start_kernel.h>
 #include <linux/io.h>
+#include <linux/lmb.h>
 
 #include <asm/processor.h>
 #include <asm/proto.h>
@@ -96,6 +97,8 @@ void __init x86_64_start_kernel(char * real_mode_data)
 
 void __init x86_64_start_reservations(char *real_mode_data)
 {
+	init_lmb_memory();
+
 	copy_bootdata(__va(real_mode_data));
 
 	reserve_early(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS");
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index d86dbf7..57ef3bd 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -11,6 +11,7 @@
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 #include <linux/kernel_stat.h>
 #include <linux/mc146818rtc.h>
 #include <linux/bitops.h>
@@ -641,7 +642,7 @@ static void __init smp_reserve_memory(struct mpf_intel *mpf)
 {
 	unsigned long size = get_mpc_size(mpf->physptr);
 
-	reserve_early_overlap_ok(mpf->physptr, mpf->physptr+size, "MP-table mpc");
+	lmb_reserve_range(mpf->physptr, mpf->physptr+size, "* MP-table mpc");
 }
 
 static int __init smp_scan_config(unsigned long base, unsigned long length)
@@ -670,7 +671,7 @@ static int __init smp_scan_config(unsigned long base, unsigned long length)
 			       mpf, (u64)virt_to_phys(mpf));
 
 			mem = virt_to_phys(mpf);
-			reserve_early_overlap_ok(mem, mem + sizeof(*mpf), "MP-table mpf");
+			lmb_reserve_range(mem, mem + sizeof(*mpf), "* MP-table mpf");
 			if (mpf->physptr)
 				smp_reserve_memory(mpf);
 
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index b008e78..3d68c3e 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -31,6 +31,7 @@
 #include <linux/apm_bios.h>
 #include <linux/initrd.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 #include <linux/seq_file.h>
 #include <linux/console.h>
 #include <linux/mca.h>
@@ -615,7 +616,7 @@ static __init void reserve_ibft_region(void)
 	addr = find_ibft_region(&size);
 
 	if (size)
-		reserve_early_overlap_ok(addr, addr + size, "ibft");
+		lmb_reserve_range(addr, addr + size, "* ibft");
 }
 
 #ifdef CONFIG_X86_RESERVE_LOW_64K
@@ -709,6 +710,15 @@ static void __init trim_bios_range(void)
 	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
 }
 
+static u64 __init get_max_mapped(void)
+{
+	u64 end = max_pfn_mapped;
+
+	end <<= PAGE_SHIFT;
+
+	return end;
+}
+
 /*
  * Determine if we were loaded by an EFI loader.  If so, then we have also been
  * passed the efi memmap, systab, etc., so we should use these data structures
@@ -897,8 +907,6 @@ void __init setup_arch(char **cmdline_p)
 	 */
 	max_pfn = e820_end_of_ram_pfn();
 
-	/* preallocate 4k for mptable mpc */
-	early_reserve_e820_mpc_new();
 	/* update e820 for memory not covered by WB MTRRs */
 	mtrr_bp_init();
 	if (mtrr_trim_uncached_memory(max_pfn))
@@ -923,15 +931,6 @@ void __init setup_arch(char **cmdline_p)
 	max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT;
 #endif
 
-#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
-	setup_bios_corruption_check();
-#endif
-
-	printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n",
-			max_pfn_mapped<<PAGE_SHIFT);
-
-	reserve_brk();
-
 	/*
 	 * Find and reserve possible boot-time SMP configuration:
 	 */
@@ -939,6 +938,26 @@ void __init setup_arch(char **cmdline_p)
 
 	reserve_ibft_region();
 
+	/*
+	 * Need to conclude brk, before fill_lmb_memory()
+	 *  it could use lmb_find_in_range, could overlap with
+	 *  brk area.
+	 */
+	reserve_brk();
+
+	lmb.current_limit = get_max_mapped();
+	fill_lmb_memory();
+
+	/* preallocate 4k for mptable mpc */
+	early_reserve_e820_mpc_new();
+
+#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
+	setup_bios_corruption_check();
+#endif
+
+	printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n",
+			max_pfn_mapped<<PAGE_SHIFT);
+
 	reserve_trampoline_memory();
 
 #ifdef CONFIG_ACPI_SLEEP
@@ -962,6 +981,7 @@ void __init setup_arch(char **cmdline_p)
 		max_low_pfn = max_pfn;
 	}
 #endif
+	lmb.current_limit = get_max_mapped();
 
 	/*
 	 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
@@ -1001,7 +1021,7 @@ void __init setup_arch(char **cmdline_p)
 
 	initmem_init(0, max_pfn, acpi, k8);
 #ifndef CONFIG_NO_BOOTMEM
-	early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
+	lmb_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
 #endif
 
 	dma32_reserve_bootmem();
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index de3b63a..2a5cc9d 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -131,13 +131,7 @@ static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align)
 
 static void __init pcpu_fc_free(void *ptr, size_t size)
 {
-#ifdef CONFIG_NO_BOOTMEM
-	u64 start = __pa(ptr);
-	u64 end = start + size;
-	free_early_partial(start, end);
-#else
 	free_bootmem(__pa(ptr), size);
-#endif
 }
 
 static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index a7bcc23..ffd987f 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -7,6 +7,7 @@
 #include <linux/string.h>
 #include <linux/init.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 #include <linux/mmzone.h>
 #include <linux/ctype.h>
 #include <linux/module.h>
@@ -171,8 +172,8 @@ static void * __init early_node_mem(int nodeid, unsigned long start,
 	if (start < (MAX_DMA32_PFN<<PAGE_SHIFT) &&
 	    end > (MAX_DMA32_PFN<<PAGE_SHIFT))
 		start = MAX_DMA32_PFN<<PAGE_SHIFT;
-	mem = find_e820_area(start, end, size, align);
-	if (mem != -1L)
+	mem = lmb_find_in_range_node(nodeid, start, end, size, align);
+	if (mem != LMB_ERROR)
 		return __va(mem);
 
 	/* extend the search scope */
@@ -181,8 +182,8 @@ static void * __init early_node_mem(int nodeid, unsigned long start,
 		start = MAX_DMA32_PFN<<PAGE_SHIFT;
 	else
 		start = MAX_DMA_PFN<<PAGE_SHIFT;
-	mem = find_e820_area(start, end, size, align);
-	if (mem != -1L)
+	mem = lmb_find_in_range_node(nodeid, start, end, size, align);
+	if (mem != LMB_ERROR)
 		return __va(mem);
 
 	printk(KERN_ERR "Cannot find %lu bytes in node %d\n",
diff --git a/kernel/Makefile b/kernel/Makefile
index ce53fb2..b263d03 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -11,7 +11,6 @@ obj-y     = sched.o fork.o exec_domain.o panic.o printk.o \
 	    hrtimer.o rwsem.o nsproxy.o srcu.o semaphore.o \
 	    notifier.o ksysfs.o pm_qos_params.o sched_clock.o cred.o \
 	    async.o range.o
-obj-$(CONFIG_HAVE_EARLY_RES) += early_res.o
 obj-y += groups.o
 
 ifdef CONFIG_FUNCTION_TRACER
diff --git a/mm/bootmem.c b/mm/bootmem.c
index ee31b95..dac3f56 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -15,6 +15,7 @@
 #include <linux/module.h>
 #include <linux/kmemleak.h>
 #include <linux/range.h>
+#include <linux/lmb.h>
 
 #include <asm/bug.h>
 #include <asm/io.h>
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 37f30fc..f67a09d 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3667,38 +3667,22 @@ int __init add_from_early_node_map(struct range *range, int az,
 void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
 					u64 goal, u64 limit)
 {
-	int i;
 	void *ptr;
 
-	/* need to go over early_node_map to find out good range for node */
-	for_each_active_range_index_in_nid(i, nid) {
-		u64 addr;
-		u64 ei_start, ei_last;
+	u64 addr;
 
-		ei_last = early_node_map[i].end_pfn;
-		ei_last <<= PAGE_SHIFT;
-		ei_start = early_node_map[i].start_pfn;
-		ei_start <<= PAGE_SHIFT;
-		addr = find_early_area(ei_start, ei_last,
-					 goal, limit, size, align);
-
-		if (addr == -1ULL)
-			continue;
+	if (limit > lmb.current_limit)
+		limit = lmb.current_limit;
 
-#if 0
-		printk(KERN_DEBUG "alloc (nid=%d %llx - %llx) (%llx - %llx) %llx %llx => %llx\n",
-				nid,
-				ei_start, ei_last, goal, limit, size,
-				align, addr);
-#endif
+	addr = find_memory_core_early(nid, size, align, goal, limit);
 
-		ptr = phys_to_virt(addr);
-		memset(ptr, 0, size);
-		reserve_early_without_check(addr, addr + size, "BOOTMEM");
-		return ptr;
-	}
+	if (addr == LMB_ERROR)
+		return NULL;
 
-	return NULL;
+	ptr = phys_to_virt(addr);
+	memset(ptr, 0, size);
+	lmb_reserve_range(addr, addr + size, "BOOTMEM");
+	return ptr;
 }
 #endif
 
diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c
index aa33fd6..29d6cbf 100644
--- a/mm/sparse-vmemmap.c
+++ b/mm/sparse-vmemmap.c
@@ -220,18 +220,7 @@ void __init sparse_mem_maps_populate_node(struct page **map_map,
 
 	if (vmemmap_buf_start) {
 		/* need to free left buf */
-#ifdef CONFIG_NO_BOOTMEM
-		free_early(__pa(vmemmap_buf_start), __pa(vmemmap_buf_end));
-		if (vmemmap_buf_start < vmemmap_buf) {
-			char name[15];
-
-			snprintf(name, sizeof(name), "MEMMAP %d", nodeid);
-			reserve_early_without_check(__pa(vmemmap_buf_start),
-						    __pa(vmemmap_buf), name);
-		}
-#else
 		free_bootmem(__pa(vmemmap_buf), vmemmap_buf_end - vmemmap_buf);
-#endif
 		vmemmap_buf = NULL;
 		vmemmap_buf_end = NULL;
 	}
-- 
1.6.4.2

[PATCH 20/25] x86: Replace e820_/_early string with lmb_

[Yinghai Lu]

1.include linux/lmb.h directly. so later could reduce e820.h reference.
2 this patch is done by sed scripts mainly

-v2: use LMB_ERROR instead of -1ULL or -1UL

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/include/asm/efi.h      |    2 +-
 arch/x86/kernel/acpi/sleep.c    |    7 ++++---
 arch/x86/kernel/apic/numaq_32.c |    3 ++-
 arch/x86/kernel/efi.c           |    5 +++--
 arch/x86/kernel/head32.c        |    4 ++--
 arch/x86/kernel/head64.c        |    4 ++--
 arch/x86/kernel/setup.c         |   29 ++++++++++++++---------------
 arch/x86/kernel/trampoline.c    |    8 ++++----
 arch/x86/mm/init.c              |    7 ++++---
 arch/x86/mm/init_32.c           |   12 +++++++-----
 arch/x86/mm/init_64.c           |   11 ++++++-----
 arch/x86/mm/k8topology_64.c     |    4 +++-
 arch/x86/mm/memtest.c           |    7 +++----
 arch/x86/mm/numa_32.c           |   25 +++++++++++++------------
 arch/x86/mm/numa_64.c           |   34 +++++++++++++++++-----------------
 arch/x86/mm/srat_32.c           |    3 ++-
 arch/x86/mm/srat_64.c           |   11 ++++++-----
 arch/x86/xen/mmu.c              |    5 +++--
 arch/x86/xen/setup.c            |    3 ++-
 mm/bootmem.c                    |    4 ++--
 20 files changed, 100 insertions(+), 88 deletions(-)

diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index 8406ed7..5f28c36 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -90,7 +90,7 @@ extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
 #endif /* CONFIG_X86_32 */
 
 extern int add_efi_memmap;
-extern void efi_reserve_early(void);
+extern void efi_lmb_reserve_range(void);
 extern void efi_call_phys_prelog(void);
 extern void efi_call_phys_epilog(void);
 
diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
index 82e5086..c552767 100644
--- a/arch/x86/kernel/acpi/sleep.c
+++ b/arch/x86/kernel/acpi/sleep.c
@@ -7,6 +7,7 @@
 
 #include <linux/acpi.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 #include <linux/dmi.h>
 #include <linux/cpumask.h>
 #include <asm/segment.h>
@@ -133,15 +134,15 @@ void __init acpi_reserve_wakeup_memory(void)
 		return;
 	}
 
-	mem = find_e820_area(0, 1<<20, WAKEUP_SIZE, PAGE_SIZE);
+	mem = lmb_find_in_range(0, 1<<20, WAKEUP_SIZE, PAGE_SIZE);
 
-	if (mem == -1L) {
+	if (mem == (unsigned long)LMB_ERROR) {
 		printk(KERN_ERR "ACPI: Cannot allocate lowmem, S3 disabled.\n");
 		return;
 	}
 	acpi_realmode = (unsigned long) phys_to_virt(mem);
 	acpi_wakeup_address = mem;
-	reserve_early(mem, mem + WAKEUP_SIZE, "ACPI WAKEUP");
+	lmb_reserve_range(mem, mem + WAKEUP_SIZE, "ACPI WAKEUP");
 }
 
 
diff --git a/arch/x86/kernel/apic/numaq_32.c b/arch/x86/kernel/apic/numaq_32.c
index 3e28401..c71e494 100644
--- a/arch/x86/kernel/apic/numaq_32.c
+++ b/arch/x86/kernel/apic/numaq_32.c
@@ -26,6 +26,7 @@
 #include <linux/nodemask.h>
 #include <linux/topology.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 #include <linux/threads.h>
 #include <linux/cpumask.h>
 #include <linux/kernel.h>
@@ -88,7 +89,7 @@ static inline void numaq_register_node(int node, struct sys_cfg_data *scd)
 	node_end_pfn[node] =
 		 MB_TO_PAGES(eq->hi_shrd_mem_start + eq->hi_shrd_mem_size);
 
-	e820_register_active_regions(node, node_start_pfn[node],
+	lmb_register_active_regions(node, node_start_pfn[node],
 						node_end_pfn[node]);
 
 	memory_present(node, node_start_pfn[node], node_end_pfn[node]);
diff --git a/arch/x86/kernel/efi.c b/arch/x86/kernel/efi.c
index c2fa9b8..00cc672 100644
--- a/arch/x86/kernel/efi.c
+++ b/arch/x86/kernel/efi.c
@@ -30,6 +30,7 @@
 #include <linux/init.h>
 #include <linux/efi.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 #include <linux/spinlock.h>
 #include <linux/uaccess.h>
 #include <linux/time.h>
@@ -275,7 +276,7 @@ static void __init do_add_efi_memmap(void)
 	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
 }
 
-void __init efi_reserve_early(void)
+void __init efi_lmb_reserve_range(void)
 {
 	unsigned long pmap;
 
@@ -290,7 +291,7 @@ void __init efi_reserve_early(void)
 		boot_params.efi_info.efi_memdesc_size;
 	memmap.desc_version = boot_params.efi_info.efi_memdesc_version;
 	memmap.desc_size = boot_params.efi_info.efi_memdesc_size;
-	reserve_early(pmap, pmap + memmap.nr_map * memmap.desc_size,
+	lmb_reserve_range(pmap, pmap + memmap.nr_map * memmap.desc_size,
 		      "EFI memmap");
 }
 
diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c
index d5258e4..3a58c71 100644
--- a/arch/x86/kernel/head32.c
+++ b/arch/x86/kernel/head32.c
@@ -42,7 +42,7 @@ void __init i386_start_kernel(void)
 	lmb_reserve_range(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, "EX TRAMPOLINE");
 #endif
 
-	reserve_early(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS");
+	lmb_reserve_range(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS");
 
 #ifdef CONFIG_BLK_DEV_INITRD
 	/* Reserve INITRD */
@@ -51,7 +51,7 @@ void __init i386_start_kernel(void)
 		u64 ramdisk_image = boot_params.hdr.ramdisk_image;
 		u64 ramdisk_size  = boot_params.hdr.ramdisk_size;
 		u64 ramdisk_end   = PAGE_ALIGN(ramdisk_image + ramdisk_size);
-		reserve_early(ramdisk_image, ramdisk_end, "RAMDISK");
+		lmb_reserve_range(ramdisk_image, ramdisk_end, "RAMDISK");
 	}
 #endif
 
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 89dd2de..5f16fbf 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -101,7 +101,7 @@ void __init x86_64_start_reservations(char *real_mode_data)
 
 	copy_bootdata(__va(real_mode_data));
 
-	reserve_early(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS");
+	lmb_reserve_range(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS");
 
 #ifdef CONFIG_BLK_DEV_INITRD
 	/* Reserve INITRD */
@@ -110,7 +110,7 @@ void __init x86_64_start_reservations(char *real_mode_data)
 		unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
 		unsigned long ramdisk_size  = boot_params.hdr.ramdisk_size;
 		unsigned long ramdisk_end   = PAGE_ALIGN(ramdisk_image + ramdisk_size);
-		reserve_early(ramdisk_image, ramdisk_end, "RAMDISK");
+		lmb_reserve_range(ramdisk_image, ramdisk_end, "RAMDISK");
 	}
 #endif
 
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 3d68c3e..ba3f94c 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -303,7 +303,7 @@ static inline void init_gbpages(void)
 static void __init reserve_brk(void)
 {
 	if (_brk_end > _brk_start)
-		reserve_early(__pa(_brk_start), __pa(_brk_end), "BRK");
+		lmb_reserve_range(__pa(_brk_start), __pa(_brk_end), "BRK");
 
 	/* Mark brk area as locked down and no longer taking any
 	   new allocations */
@@ -325,17 +325,16 @@ static void __init relocate_initrd(void)
 	char *p, *q;
 
 	/* We need to move the initrd down into lowmem */
-	ramdisk_here = find_e820_area(0, end_of_lowmem, area_size,
+	ramdisk_here = lmb_find_in_range(0, end_of_lowmem, area_size,
 					 PAGE_SIZE);
 
-	if (ramdisk_here == -1ULL)
+	if (ramdisk_here == LMB_ERROR)
 		panic("Cannot find place for new RAMDISK of size %lld\n",
 			 ramdisk_size);
 
 	/* Note: this includes all the lowmem currently occupied by
 	   the initrd, we rely on that fact to keep the data intact. */
-	reserve_early(ramdisk_here, ramdisk_here + area_size,
-			 "NEW RAMDISK");
+	lmb_reserve_range(ramdisk_here, ramdisk_here + area_size, "NEW RAMDISK");
 	initrd_start = ramdisk_here + PAGE_OFFSET;
 	initrd_end   = initrd_start + ramdisk_size;
 	printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n",
@@ -391,7 +390,7 @@ static void __init reserve_initrd(void)
 	initrd_start = 0;
 
 	if (ramdisk_size >= (end_of_lowmem>>1)) {
-		free_early(ramdisk_image, ramdisk_end);
+		lmb_free_range(ramdisk_image, ramdisk_end);
 		printk(KERN_ERR "initrd too large to handle, "
 		       "disabling initrd\n");
 		return;
@@ -414,7 +413,7 @@ static void __init reserve_initrd(void)
 
 	relocate_initrd();
 
-	free_early(ramdisk_image, ramdisk_end);
+	lmb_free_range(ramdisk_image, ramdisk_end);
 }
 #else
 static void __init reserve_initrd(void)
@@ -470,7 +469,7 @@ static void __init e820_reserve_setup_data(void)
 	e820_print_map("reserve setup_data");
 }
 
-static void __init reserve_early_setup_data(void)
+static void __init lmb_reserve_range_setup_data(void)
 {
 	struct setup_data *data;
 	u64 pa_data;
@@ -482,7 +481,7 @@ static void __init reserve_early_setup_data(void)
 	while (pa_data) {
 		data = early_memremap(pa_data, sizeof(*data));
 		sprintf(buf, "setup data %x", data->type);
-		reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
+		lmb_reserve_range(pa_data, pa_data+sizeof(*data)+data->len, buf);
 		pa_data = data->next;
 		early_iounmap(data, sizeof(*data));
 	}
@@ -520,23 +519,23 @@ static void __init reserve_crashkernel(void)
 	if (crash_base <= 0) {
 		const unsigned long long alignment = 16<<20;	/* 16M */
 
-		crash_base = find_e820_area(alignment, ULONG_MAX, crash_size,
+		crash_base = lmb_find_in_range(alignment, ULONG_MAX, crash_size,
 				 alignment);
-		if (crash_base == -1ULL) {
+		if (crash_base == LMB_ERROR) {
 			pr_info("crashkernel reservation failed - No suitable area found.\n");
 			return;
 		}
 	} else {
 		unsigned long long start;
 
-		start = find_e820_area(crash_base, ULONG_MAX, crash_size,
+		start = lmb_find_in_range(crash_base, ULONG_MAX, crash_size,
 				 1<<20);
 		if (start != crash_base) {
 			pr_info("crashkernel reservation failed - memory is in use.\n");
 			return;
 		}
 	}
-	reserve_early(crash_base, crash_base + crash_size, "CRASH KERNEL");
+	lmb_reserve_range(crash_base, crash_base + crash_size, "CRASH KERNEL");
 
 	printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
 			"for crashkernel (System RAM: %ldMB)\n",
@@ -792,7 +791,7 @@ void __init setup_arch(char **cmdline_p)
 #endif
 	 4)) {
 		efi_enabled = 1;
-		efi_reserve_early();
+		efi_lmb_reserve_range();
 	}
 #endif
 
@@ -852,7 +851,7 @@ void __init setup_arch(char **cmdline_p)
 	vmi_activate();
 
 	/* after early param, so could get panic from serial */
-	reserve_early_setup_data();
+	lmb_reserve_range_setup_data();
 
 	if (acpi_mps_check()) {
 #ifdef CONFIG_X86_LOCAL_APIC
diff --git a/arch/x86/kernel/trampoline.c b/arch/x86/kernel/trampoline.c
index c652ef6..725477e 100644
--- a/arch/x86/kernel/trampoline.c
+++ b/arch/x86/kernel/trampoline.c
@@ -1,7 +1,7 @@
 #include <linux/io.h>
+#include <linux/lmb.h>
 
 #include <asm/trampoline.h>
-#include <asm/e820.h>
 
 #if defined(CONFIG_X86_64) && defined(CONFIG_ACPI_SLEEP)
 #define __trampinit
@@ -19,12 +19,12 @@ void __init reserve_trampoline_memory(void)
 	unsigned long mem;
 
 	/* Has to be in very low memory so we can execute real-mode AP code. */
-	mem = find_e820_area(0, 1<<20, TRAMPOLINE_SIZE, PAGE_SIZE);
-	if (mem == -1L)
+	mem = lmb_find_in_range(0, 1<<20, TRAMPOLINE_SIZE, PAGE_SIZE);
+	if (mem == (unsigned long)LMB_ERROR)
 		panic("Cannot allocate trampoline\n");
 
 	trampoline_base = __va(mem);
-	reserve_early(mem, mem + TRAMPOLINE_SIZE, "TRAMPOLINE");
+	lmb_reserve_range(mem, mem + TRAMPOLINE_SIZE, "TRAMPOLINE");
 }
 
 /*
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index b278535..0bfbd02 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -2,6 +2,7 @@
 #include <linux/initrd.h>
 #include <linux/ioport.h>
 #include <linux/swap.h>
+#include <linux/lmb.h>
 
 #include <asm/cacheflush.h>
 #include <asm/e820.h>
@@ -75,9 +76,9 @@ static void __init find_early_table_space(unsigned long end, int use_pse,
 #else
 	start = 0x8000;
 #endif
-	e820_table_start = find_e820_area(start, max_pfn_mapped<<PAGE_SHIFT,
+	e820_table_start = lmb_find_in_range(start, max_pfn_mapped<<PAGE_SHIFT,
 					tables, PAGE_SIZE);
-	if (e820_table_start == -1UL)
+	if (e820_table_start == (unsigned long)LMB_ERROR)
 		panic("Cannot find space for the kernel page tables");
 
 	e820_table_start >>= PAGE_SHIFT;
@@ -299,7 +300,7 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
 	__flush_tlb_all();
 
 	if (!after_bootmem && e820_table_end > e820_table_start)
-		reserve_early(e820_table_start << PAGE_SHIFT,
+		lmb_reserve_range(e820_table_start << PAGE_SHIFT,
 				 e820_table_end << PAGE_SHIFT, "PGTABLE");
 
 	if (!after_bootmem)
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 90e0545..e3ae067 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -25,6 +25,7 @@
 #include <linux/pfn.h>
 #include <linux/poison.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 #include <linux/proc_fs.h>
 #include <linux/memory_hotplug.h>
 #include <linux/initrd.h>
@@ -712,14 +713,14 @@ void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn,
 	highstart_pfn = highend_pfn = max_pfn;
 	if (max_pfn > max_low_pfn)
 		highstart_pfn = max_low_pfn;
-	e820_register_active_regions(0, 0, highend_pfn);
+	lmb_register_active_regions(0, 0, highend_pfn);
 	sparse_memory_present_with_active_regions(0);
 	printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
 		pages_to_mb(highend_pfn - highstart_pfn));
 	num_physpages = highend_pfn;
 	high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
 #else
-	e820_register_active_regions(0, 0, max_low_pfn);
+	lmb_register_active_regions(0, 0, max_low_pfn);
 	sparse_memory_present_with_active_regions(0);
 	num_physpages = max_low_pfn;
 	high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
@@ -781,11 +782,11 @@ void __init setup_bootmem_allocator(void)
 	 * Initialize the boot-time allocator (with low memory only):
 	 */
 	bootmap_size = bootmem_bootmap_pages(max_low_pfn)<<PAGE_SHIFT;
-	bootmap = find_e820_area(0, max_pfn_mapped<<PAGE_SHIFT, bootmap_size,
+	bootmap = lmb_find_in_range(0, max_pfn_mapped<<PAGE_SHIFT, bootmap_size,
 				 PAGE_SIZE);
-	if (bootmap == -1L)
+	if (bootmap == (unsigned long)LMB_ERROR)
 		panic("Cannot find bootmem map of size %ld\n", bootmap_size);
-	reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");
+	lmb_reserve_range(bootmap, bootmap + bootmap_size, "BOOTMAP");
 #endif
 
 	printk(KERN_INFO "  mapped low ram: 0 - %08lx\n",
@@ -1069,3 +1070,4 @@ void mark_rodata_ro(void)
 #endif
 }
 #endif
+
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 634fa08..bb9315f 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -21,6 +21,7 @@
 #include <linux/initrd.h>
 #include <linux/pagemap.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 #include <linux/proc_fs.h>
 #include <linux/pci.h>
 #include <linux/pfn.h>
@@ -577,18 +578,18 @@ void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn,
 	unsigned long bootmap_size, bootmap;
 
 	bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
-	bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size,
+	bootmap = lmb_find_in_range(0, end_pfn<<PAGE_SHIFT, bootmap_size,
 				 PAGE_SIZE);
-	if (bootmap == -1L)
+	if (bootmap == LMB_ERROR)
 		panic("Cannot find bootmem map of size %ld\n", bootmap_size);
-	reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");
+	lmb_reserve_range(bootmap, bootmap + bootmap_size, "BOOTMAP");
 	/* don't touch min_low_pfn */
 	bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT,
 					 0, end_pfn);
-	e820_register_active_regions(0, start_pfn, end_pfn);
+	lmb_register_active_regions(0, start_pfn, end_pfn);
 	free_bootmem_with_active_regions(0, end_pfn);
 #else
-	e820_register_active_regions(0, start_pfn, end_pfn);
+	lmb_register_active_regions(0, start_pfn, end_pfn);
 #endif
 }
 #endif
diff --git a/arch/x86/mm/k8topology_64.c b/arch/x86/mm/k8topology_64.c
index 970ed57..d7d031b 100644
--- a/arch/x86/mm/k8topology_64.c
+++ b/arch/x86/mm/k8topology_64.c
@@ -11,6 +11,8 @@
 #include <linux/string.h>
 #include <linux/module.h>
 #include <linux/nodemask.h>
+#include <linux/lmb.h>
+
 #include <asm/io.h>
 #include <linux/pci_ids.h>
 #include <linux/acpi.h>
@@ -222,7 +224,7 @@ int __init k8_scan_nodes(void)
 	for_each_node_mask(i, node_possible_map) {
 		int j;
 
-		e820_register_active_regions(i,
+		lmb_register_active_regions(i,
 				nodes[i].start >> PAGE_SHIFT,
 				nodes[i].end >> PAGE_SHIFT);
 		for (j = apicid_base; j < cores + apicid_base; j++)
diff --git a/arch/x86/mm/memtest.c b/arch/x86/mm/memtest.c
index 18d244f..9911122 100644
--- a/arch/x86/mm/memtest.c
+++ b/arch/x86/mm/memtest.c
@@ -6,8 +6,7 @@
 #include <linux/smp.h>
 #include <linux/init.h>
 #include <linux/pfn.h>
-
-#include <asm/e820.h>
+#include <linux/lmb.h>
 
 static u64 patterns[] __initdata = {
 	0,
@@ -35,7 +34,7 @@ static void __init reserve_bad_mem(u64 pattern, u64 start_bad, u64 end_bad)
 	       (unsigned long long) pattern,
 	       (unsigned long long) start_bad,
 	       (unsigned long long) end_bad);
-	reserve_early(start_bad, end_bad, "BAD RAM");
+	lmb_reserve_range(start_bad, end_bad, "BAD RAM");
 }
 
 static void __init memtest(u64 pattern, u64 start_phys, u64 size)
@@ -74,7 +73,7 @@ static void __init do_one_pass(u64 pattern, u64 start, u64 end)
 	u64 size = 0;
 
 	while (start < end) {
-		start = find_e820_area_size(start, &size, 1);
+		start = lmb_find_in_range_size(start, &size, 1);
 
 		/* done ? */
 		if (start >= end)
diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index 809baaa..303cc3b 100644
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -24,6 +24,7 @@
 
 #include <linux/mm.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 #include <linux/mmzone.h>
 #include <linux/highmem.h>
 #include <linux/initrd.h>
@@ -120,7 +121,7 @@ int __init get_memcfg_numa_flat(void)
 
 	node_start_pfn[0] = 0;
 	node_end_pfn[0] = max_pfn;
-	e820_register_active_regions(0, 0, max_pfn);
+	lmb_register_active_regions(0, 0, max_pfn);
 	memory_present(0, 0, max_pfn);
 	node_remap_size[0] = node_memmap_size_bytes(0, 0, max_pfn);
 
@@ -161,14 +162,14 @@ static void __init allocate_pgdat(int nid)
 		NODE_DATA(nid) = (pg_data_t *)node_remap_start_vaddr[nid];
 	else {
 		unsigned long pgdat_phys;
-		pgdat_phys = find_e820_area(min_low_pfn<<PAGE_SHIFT,
+		pgdat_phys = lmb_find_in_range(min_low_pfn<<PAGE_SHIFT,
 				 max_pfn_mapped<<PAGE_SHIFT,
 				 sizeof(pg_data_t),
 				 PAGE_SIZE);
 		NODE_DATA(nid) = (pg_data_t *)(pfn_to_kaddr(pgdat_phys>>PAGE_SHIFT));
 		memset(buf, 0, sizeof(buf));
 		sprintf(buf, "NODE_DATA %d",  nid);
-		reserve_early(pgdat_phys, pgdat_phys + sizeof(pg_data_t), buf);
+		lmb_reserve_range(pgdat_phys, pgdat_phys + sizeof(pg_data_t), buf);
 	}
 	printk(KERN_DEBUG "allocate_pgdat: node %d NODE_DATA %08lx\n",
 		nid, (unsigned long)NODE_DATA(nid));
@@ -291,15 +292,15 @@ static __init unsigned long calculate_numa_remap_pages(void)
 						 PTRS_PER_PTE);
 		node_kva_target <<= PAGE_SHIFT;
 		do {
-			node_kva_final = find_e820_area(node_kva_target,
+			node_kva_final = lmb_find_in_range(node_kva_target,
 					((u64)node_end_pfn[nid])<<PAGE_SHIFT,
 						((u64)size)<<PAGE_SHIFT,
 						LARGE_PAGE_BYTES);
 			node_kva_target -= LARGE_PAGE_BYTES;
-		} while (node_kva_final == -1ULL &&
+		} while (node_kva_final == LMB_ERROR &&
 			 (node_kva_target>>PAGE_SHIFT) > (node_start_pfn[nid]));
 
-		if (node_kva_final == -1ULL)
+		if (node_kva_final == LMB_ERROR)
 			panic("Can not get kva ram\n");
 
 		node_remap_size[nid] = size;
@@ -318,9 +319,9 @@ static __init unsigned long calculate_numa_remap_pages(void)
 		 *  but we could have some hole in high memory, and it will only
 		 *  check page_is_ram(pfn) && !page_is_reserved_early(pfn) to decide
 		 *  to use it as free.
-		 *  So reserve_early here, hope we don't run out of that array
+		 *  So lmb_reserve_range here, hope we don't run out of that array
 		 */
-		reserve_early(node_kva_final,
+		lmb_reserve_range(node_kva_final,
 			      node_kva_final+(((u64)size)<<PAGE_SHIFT),
 			      "KVA RAM");
 
@@ -367,14 +368,14 @@ void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn,
 
 	kva_target_pfn = round_down(max_low_pfn - kva_pages, PTRS_PER_PTE);
 	do {
-		kva_start_pfn = find_e820_area(kva_target_pfn<<PAGE_SHIFT,
+		kva_start_pfn = lmb_find_in_range(kva_target_pfn<<PAGE_SHIFT,
 					max_low_pfn<<PAGE_SHIFT,
 					kva_pages<<PAGE_SHIFT,
 					PTRS_PER_PTE<<PAGE_SHIFT) >> PAGE_SHIFT;
 		kva_target_pfn -= PTRS_PER_PTE;
-	} while (kva_start_pfn == -1UL && kva_target_pfn > min_low_pfn);
+	} while (kva_start_pfn == (unsigned long)LMB_ERROR && kva_target_pfn > min_low_pfn);
 
-	if (kva_start_pfn == -1UL)
+	if (kva_start_pfn == (unsigned long)LMB_ERROR)
 		panic("Can not get kva space\n");
 
 	printk(KERN_INFO "kva_start_pfn ~ %lx max_low_pfn ~ %lx\n",
@@ -382,7 +383,7 @@ void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn,
 	printk(KERN_INFO "max_pfn = %lx\n", max_pfn);
 
 	/* avoid clash with initrd */
-	reserve_early(kva_start_pfn<<PAGE_SHIFT,
+	lmb_reserve_range(kva_start_pfn<<PAGE_SHIFT,
 		      (kva_start_pfn + kva_pages)<<PAGE_SHIFT,
 		     "KVA PG");
 #ifdef CONFIG_HIGHMEM
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index ffd987f..92c01a5 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -87,16 +87,16 @@ static int __init allocate_cachealigned_memnodemap(void)
 
 	addr = 0x8000;
 	nodemap_size = roundup(sizeof(s16) * memnodemapsize, L1_CACHE_BYTES);
-	nodemap_addr = find_e820_area(addr, max_pfn<<PAGE_SHIFT,
+	nodemap_addr = lmb_find_in_range(addr, max_pfn<<PAGE_SHIFT,
 				      nodemap_size, L1_CACHE_BYTES);
-	if (nodemap_addr == -1UL) {
+	if (nodemap_addr == LMB_ERROR) {
 		printk(KERN_ERR
 		       "NUMA: Unable to allocate Memory to Node hash map\n");
 		nodemap_addr = nodemap_size = 0;
 		return -1;
 	}
 	memnodemap = phys_to_virt(nodemap_addr);
-	reserve_early(nodemap_addr, nodemap_addr + nodemap_size, "MEMNODEMAP");
+	lmb_reserve_range(nodemap_addr, nodemap_addr + nodemap_size, "MEMNODEMAP");
 
 	printk(KERN_DEBUG "NUMA: Allocated memnodemap from %lx - %lx\n",
 	       nodemap_addr, nodemap_addr + nodemap_size);
@@ -227,7 +227,7 @@ setup_node_bootmem(int nodeid, unsigned long start, unsigned long end)
 	if (node_data[nodeid] == NULL)
 		return;
 	nodedata_phys = __pa(node_data[nodeid]);
-	reserve_early(nodedata_phys, nodedata_phys + pgdat_size, "NODE_DATA");
+	lmb_reserve_range(nodedata_phys, nodedata_phys + pgdat_size, "NODE_DATA");
 	printk(KERN_INFO "  NODE_DATA [%016lx - %016lx]\n", nodedata_phys,
 		nodedata_phys + pgdat_size - 1);
 	nid = phys_to_nid(nodedata_phys);
@@ -246,7 +246,7 @@ setup_node_bootmem(int nodeid, unsigned long start, unsigned long end)
 	 * Find a place for the bootmem map
 	 * nodedata_phys could be on other nodes by alloc_bootmem,
 	 * so need to sure bootmap_start not to be small, otherwise
-	 * early_node_mem will get that with find_e820_area instead
+	 * early_node_mem will get that with lmb_find_in_range instead
 	 * of alloc_bootmem, that could clash with reserved range
 	 */
 	bootmap_pages = bootmem_bootmap_pages(last_pfn - start_pfn);
@@ -258,12 +258,12 @@ setup_node_bootmem(int nodeid, unsigned long start, unsigned long end)
 	bootmap = early_node_mem(nodeid, bootmap_start, end,
 				 bootmap_pages<<PAGE_SHIFT, PAGE_SIZE);
 	if (bootmap == NULL)  {
-		free_early(nodedata_phys, nodedata_phys + pgdat_size);
+		lmb_free_range(nodedata_phys, nodedata_phys + pgdat_size);
 		node_data[nodeid] = NULL;
 		return;
 	}
 	bootmap_start = __pa(bootmap);
-	reserve_early(bootmap_start, bootmap_start+(bootmap_pages<<PAGE_SHIFT),
+	lmb_reserve_range(bootmap_start, bootmap_start+(bootmap_pages<<PAGE_SHIFT),
 			"BOOTMAP");
 
 	bootmap_size = init_bootmem_node(NODE_DATA(nodeid),
@@ -417,7 +417,7 @@ static int __init split_nodes_interleave(u64 addr, u64 max_addr,
 		nr_nodes = MAX_NUMNODES;
 	}
 
-	size = (max_addr - addr - e820_hole_size(addr, max_addr)) / nr_nodes;
+	size = (max_addr - addr - lmb_hole_size(addr, max_addr)) / nr_nodes;
 	/*
 	 * Calculate the number of big nodes that can be allocated as a result
 	 * of consolidating the remainder.
@@ -453,7 +453,7 @@ static int __init split_nodes_interleave(u64 addr, u64 max_addr,
 			 * non-reserved memory is less than the per-node size.
 			 */
 			while (end - physnodes[i].start -
-				e820_hole_size(physnodes[i].start, end) < size) {
+				lmb_hole_size(physnodes[i].start, end) < size) {
 				end += FAKE_NODE_MIN_SIZE;
 				if (end > physnodes[i].end) {
 					end = physnodes[i].end;
@@ -467,7 +467,7 @@ static int __init split_nodes_interleave(u64 addr, u64 max_addr,
 			 * this one must extend to the boundary.
 			 */
 			if (end < dma32_end && dma32_end - end -
-			    e820_hole_size(end, dma32_end) < FAKE_NODE_MIN_SIZE)
+			    lmb_hole_size(end, dma32_end) < FAKE_NODE_MIN_SIZE)
 				end = dma32_end;
 
 			/*
@@ -476,7 +476,7 @@ static int __init split_nodes_interleave(u64 addr, u64 max_addr,
 			 * physical node.
 			 */
 			if (physnodes[i].end - end -
-			    e820_hole_size(end, physnodes[i].end) < size)
+			    lmb_hole_size(end, physnodes[i].end) < size)
 				end = physnodes[i].end;
 
 			/*
@@ -504,7 +504,7 @@ static u64 __init find_end_of_node(u64 start, u64 max_addr, u64 size)
 {
 	u64 end = start + size;
 
-	while (end - start - e820_hole_size(start, end) < size) {
+	while (end - start - lmb_hole_size(start, end) < size) {
 		end += FAKE_NODE_MIN_SIZE;
 		if (end > max_addr) {
 			end = max_addr;
@@ -533,7 +533,7 @@ static int __init split_nodes_size_interleave(u64 addr, u64 max_addr, u64 size)
 	 * creates a uniform distribution of node sizes across the entire
 	 * machine (but not necessarily over physical nodes).
 	 */
-	min_size = (max_addr - addr - e820_hole_size(addr, max_addr)) /
+	min_size = (max_addr - addr - lmb_hole_size(addr, max_addr)) /
 						MAX_NUMNODES;
 	min_size = max(min_size, FAKE_NODE_MIN_SIZE);
 	if ((min_size & FAKE_NODE_MIN_HASH_MASK) < min_size)
@@ -566,7 +566,7 @@ static int __init split_nodes_size_interleave(u64 addr, u64 max_addr, u64 size)
 			 * this one must extend to the boundary.
 			 */
 			if (end < dma32_end && dma32_end - end -
-			    e820_hole_size(end, dma32_end) < FAKE_NODE_MIN_SIZE)
+			    lmb_hole_size(end, dma32_end) < FAKE_NODE_MIN_SIZE)
 				end = dma32_end;
 
 			/*
@@ -575,7 +575,7 @@ static int __init split_nodes_size_interleave(u64 addr, u64 max_addr, u64 size)
 			 * physical node.
 			 */
 			if (physnodes[i].end - end -
-			    e820_hole_size(end, physnodes[i].end) < size)
+			    lmb_hole_size(end, physnodes[i].end) < size)
 				end = physnodes[i].end;
 
 			/*
@@ -639,7 +639,7 @@ static int __init numa_emulation(unsigned long start_pfn,
 	 */
 	remove_all_active_ranges();
 	for_each_node_mask(i, node_possible_map) {
-		e820_register_active_regions(i, nodes[i].start >> PAGE_SHIFT,
+		lmb_register_active_regions(i, nodes[i].start >> PAGE_SHIFT,
 						nodes[i].end >> PAGE_SHIFT);
 		setup_node_bootmem(i, nodes[i].start, nodes[i].end);
 	}
@@ -692,7 +692,7 @@ void __init initmem_init(unsigned long start_pfn, unsigned long last_pfn,
 	node_set(0, node_possible_map);
 	for (i = 0; i < nr_cpu_ids; i++)
 		numa_set_node(i, 0);
-	e820_register_active_regions(0, start_pfn, last_pfn);
+	lmb_register_active_regions(0, start_pfn, last_pfn);
 	setup_node_bootmem(0, start_pfn << PAGE_SHIFT, last_pfn << PAGE_SHIFT);
 }
 
diff --git a/arch/x86/mm/srat_32.c b/arch/x86/mm/srat_32.c
index 9324f13..68dd606 100644
--- a/arch/x86/mm/srat_32.c
+++ b/arch/x86/mm/srat_32.c
@@ -25,6 +25,7 @@
  */
 #include <linux/mm.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 #include <linux/mmzone.h>
 #include <linux/acpi.h>
 #include <linux/nodemask.h>
@@ -264,7 +265,7 @@ int __init get_memcfg_from_srat(void)
 		if (node_read_chunk(chunk->nid, chunk))
 			continue;
 
-		e820_register_active_regions(chunk->nid, chunk->start_pfn,
+		lmb_register_active_regions(chunk->nid, chunk->start_pfn,
 					     min(chunk->end_pfn, max_pfn));
 	}
 	/* for out of order entries in SRAT */
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index f9897f7..8f82c80 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -16,6 +16,7 @@
 #include <linux/module.h>
 #include <linux/topology.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 #include <linux/mm.h>
 #include <asm/proto.h>
 #include <asm/numa.h>
@@ -98,15 +99,15 @@ void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
 	unsigned long phys;
 
 	length = slit->header.length;
-	phys = find_e820_area(0, max_pfn_mapped<<PAGE_SHIFT, length,
+	phys = lmb_find_in_range(0, max_pfn_mapped<<PAGE_SHIFT, length,
 		 PAGE_SIZE);
 
-	if (phys == -1L)
+	if (phys == (unsigned long)LMB_ERROR)
 		panic(" Can not save slit!\n");
 
 	acpi_slit = __va(phys);
 	memcpy(acpi_slit, slit, length);
-	reserve_early(phys, phys + length, "ACPI SLIT");
+	lmb_reserve_range(phys, phys + length, "ACPI SLIT");
 }
 
 /* Callback for Proximity Domain -> x2APIC mapping */
@@ -324,7 +325,7 @@ static int __init nodes_cover_memory(const struct bootnode *nodes)
 			pxmram = 0;
 	}
 
-	e820ram = max_pfn - (e820_hole_size(0, max_pfn<<PAGE_SHIFT)>>PAGE_SHIFT);
+	e820ram = max_pfn - (lmb_hole_size(0, max_pfn<<PAGE_SHIFT)>>PAGE_SHIFT);
 	/* We seem to lose 3 pages somewhere. Allow 1M of slack. */
 	if ((long)(e820ram - pxmram) >= (1<<(20 - PAGE_SHIFT))) {
 		printk(KERN_ERR
@@ -421,7 +422,7 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)
 	}
 
 	for_each_node_mask(i, nodes_parsed)
-		e820_register_active_regions(i, nodes[i].start >> PAGE_SHIFT,
+		lmb_register_active_regions(i, nodes[i].start >> PAGE_SHIFT,
 						nodes[i].end >> PAGE_SHIFT);
 	/* for out of order entries in SRAT */
 	sort_node_map();
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 914f046..2c8c862 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -44,6 +44,7 @@
 #include <linux/bug.h>
 #include <linux/module.h>
 #include <linux/gfp.h>
+#include <linux/lmb.h>
 
 #include <asm/pgtable.h>
 #include <asm/tlbflush.h>
@@ -1735,7 +1736,7 @@ __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd,
 	__xen_write_cr3(true, __pa(pgd));
 	xen_mc_issue(PARAVIRT_LAZY_CPU);
 
-	reserve_early(__pa(xen_start_info->pt_base),
+	lmb_reserve_range(__pa(xen_start_info->pt_base),
 		      __pa(xen_start_info->pt_base +
 			   xen_start_info->nr_pt_frames * PAGE_SIZE),
 		      "XEN PAGETABLES");
@@ -1773,7 +1774,7 @@ __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd,
 
 	pin_pagetable_pfn(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(swapper_pg_dir)));
 
-	reserve_early(__pa(xen_start_info->pt_base),
+	lmb_reserve_range(__pa(xen_start_info->pt_base),
 		      __pa(xen_start_info->pt_base +
 			   xen_start_info->nr_pt_frames * PAGE_SIZE),
 		      "XEN PAGETABLES");
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index ad0047f..a156e16 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -8,6 +8,7 @@
 #include <linux/sched.h>
 #include <linux/mm.h>
 #include <linux/pm.h>
+#include <linux/lmb.h>
 
 #include <asm/elf.h>
 #include <asm/vdso.h>
@@ -61,7 +62,7 @@ char * __init xen_memory_setup(void)
 	 *  - xen_start_info
 	 * See comment above "struct start_info" in <xen/interface/xen.h>
 	 */
-	reserve_early(__pa(xen_start_info->mfn_list),
+	lmb_reserve_range(__pa(xen_start_info->mfn_list),
 		      __pa(xen_start_info->pt_base),
 			"XEN START INFO");
 
diff --git a/mm/bootmem.c b/mm/bootmem.c
index dac3f56..f332b70 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -435,7 +435,7 @@ void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
 			      unsigned long size)
 {
 #ifdef CONFIG_NO_BOOTMEM
-	free_early(physaddr, physaddr + size);
+	lmb_free_range(physaddr, physaddr + size);
 #else
 	unsigned long start, end;
 
@@ -460,7 +460,7 @@ void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
 void __init free_bootmem(unsigned long addr, unsigned long size)
 {
 #ifdef CONFIG_NO_BOOTMEM
-	free_early(addr, addr + size);
+	lmb_free_range(addr, addr + size);
 #else
 	unsigned long start, end;
 
-- 
1.6.4.2

[PATCH 21/25] x86: Remove not used early_res code

[Yinghai Lu]

and some functions in e820.c that are not used anymore

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/include/asm/e820.h |   14 -
 arch/x86/kernel/e820.c      |   52 ----
 include/linux/early_res.h   |   23 --
 kernel/early_res.c          |  584 -------------------------------------------
 4 files changed, 0 insertions(+), 673 deletions(-)
 delete mode 100644 include/linux/early_res.h
 delete mode 100644 kernel/early_res.c

diff --git a/arch/x86/include/asm/e820.h b/arch/x86/include/asm/e820.h
index 38adac8..6fbd8cd 100644
--- a/arch/x86/include/asm/e820.h
+++ b/arch/x86/include/asm/e820.h
@@ -112,32 +112,18 @@ static inline void early_memtest(unsigned long start, unsigned long end)
 }
 #endif
 
-extern unsigned long end_user_pfn;
-
-extern u64 find_e820_area(u64 start, u64 end, u64 size, u64 align);
-extern u64 find_e820_area_size(u64 start, u64 *sizep, u64 align);
-extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align);
-
 extern unsigned long e820_end_of_ram_pfn(void);
 extern unsigned long e820_end_of_low_ram_pfn(void);
-extern void e820_register_active_regions(int nid, unsigned long start_pfn,
-					 unsigned long end_pfn);
-extern u64 e820_hole_size(u64 start, u64 end);
-
 extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align);
 
 void init_lmb_memory(void);
 void fill_lmb_memory(void);
-
 extern void finish_e820_parsing(void);
 extern void e820_reserve_resources(void);
 extern void e820_reserve_resources_late(void);
 extern void setup_memory_map(void);
 extern char *default_machine_specific_memory_setup(void);
 
-void reserve_early(u64 start, u64 end, char *name);
-void free_early(u64 start, u64 end);
-
 /*
  * Returns true iff the specified range [s,e) is completely contained inside
  * the ISA region.
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index b4a2301..c8edb78 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -739,32 +739,6 @@ core_initcall(e820_mark_nvs_memory);
 #endif
 
 /*
- * Find a free area with specified alignment in a specific range.
- */
-u64 __init find_e820_area(u64 start, u64 end, u64 size, u64 align)
-{
-	u64 mem = lmb_find_in_range(start, end, size, align);
-
-	if (mem == LMB_ERROR)
-		return -1ULL;
-
-	return mem;
-}
-
-/*
- * Find next free range after *start
- */
-u64 __init find_e820_area_size(u64 start, u64 *sizep, u64 align)
-{
-	u64 mem = lmb_find_in_range_size(start, sizep, align);
-
-	if (mem == LMB_ERROR)
-		return -1ULL
-
-	return mem;
-}
-
-/*
  * pre allocated 4k and reserved it in lmb and e820_saved
  */
 u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align)
@@ -856,32 +830,6 @@ unsigned long __init e820_end_of_low_ram_pfn(void)
 	return e820_end_pfn(1UL<<(32 - PAGE_SHIFT), E820_RAM);
 }
 
-/* Walk the e820 map and register active regions within a node */
-void __init e820_register_active_regions(int nid, unsigned long start_pfn,
-					 unsigned long last_pfn)
-{
-	lmb_register_active_regions(nid, start_pfn, last_pfn);
-}
-
-/*
- * Find the hole size (in bytes) in the memory range.
- * @start: starting address of the memory range to scan
- * @end: ending address of the memory range to scan
- */
-u64 __init e820_hole_size(u64 start, u64 end)
-{
-	return lmb_hole_size(start, end);
-}
-
-void reserve_early(u64 start, u64 end, char *name)
-{
-	lmb_reserve_range(start, end, name);
-}
-void free_early(u64 start, u64 end)
-{
-	lmb_free_range(start, end);
-}
-
 static void early_panic(char *msg)
 {
 	early_printk(msg);
diff --git a/include/linux/early_res.h b/include/linux/early_res.h
deleted file mode 100644
index 29c09f5..0000000
--- a/include/linux/early_res.h
+++ /dev/null
@@ -1,23 +0,0 @@
-#ifndef _LINUX_EARLY_RES_H
-#define _LINUX_EARLY_RES_H
-#ifdef __KERNEL__
-
-extern void reserve_early(u64 start, u64 end, char *name);
-extern void reserve_early_overlap_ok(u64 start, u64 end, char *name);
-extern void free_early(u64 start, u64 end);
-void free_early_partial(u64 start, u64 end);
-extern void early_res_to_bootmem(u64 start, u64 end);
-
-void reserve_early_without_check(u64 start, u64 end, char *name);
-u64 find_early_area(u64 ei_start, u64 ei_last, u64 start, u64 end,
-			 u64 size, u64 align);
-u64 find_early_area_size(u64 ei_start, u64 ei_last, u64 start,
-			 u64 *sizep, u64 align);
-u64 find_fw_memmap_area(u64 start, u64 end, u64 size, u64 align);
-u64 get_max_mapped(void);
-#include <linux/range.h>
-int get_free_all_memory_range(struct range **rangep, int nodeid);
-
-#endif /* __KERNEL__ */
-
-#endif /* _LINUX_EARLY_RES_H */
diff --git a/kernel/early_res.c b/kernel/early_res.c
deleted file mode 100644
index 31aa933..0000000
--- a/kernel/early_res.c
+++ /dev/null
@@ -1,584 +0,0 @@
-/*
- * early_res, could be used to replace bootmem
- */
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/bootmem.h>
-#include <linux/mm.h>
-#include <linux/early_res.h>
-
-/*
- * Early reserved memory areas.
- */
-/*
- * need to make sure this one is bigger enough before
- * find_fw_memmap_area could be used
- */
-#define MAX_EARLY_RES_X 32
-
-struct early_res {
-	u64 start, end;
-	char name[15];
-	char overlap_ok;
-};
-static struct early_res early_res_x[MAX_EARLY_RES_X] __initdata;
-
-static int max_early_res __initdata = MAX_EARLY_RES_X;
-static struct early_res *early_res __initdata = &early_res_x[0];
-static int early_res_count __initdata;
-
-static int __init find_overlapped_early(u64 start, u64 end)
-{
-	int i;
-	struct early_res *r;
-
-	for (i = 0; i < max_early_res && early_res[i].end; i++) {
-		r = &early_res[i];
-		if (end > r->start && start < r->end)
-			break;
-	}
-
-	return i;
-}
-
-/*
- * Drop the i-th range from the early reservation map,
- * by copying any higher ranges down one over it, and
- * clearing what had been the last slot.
- */
-static void __init drop_range(int i)
-{
-	int j;
-
-	for (j = i + 1; j < max_early_res && early_res[j].end; j++)
-		;
-
-	memmove(&early_res[i], &early_res[i + 1],
-	       (j - 1 - i) * sizeof(struct early_res));
-
-	early_res[j - 1].end = 0;
-	early_res_count--;
-}
-
-static void __init drop_range_partial(int i, u64 start, u64 end)
-{
-	u64 common_start, common_end;
-	u64 old_start, old_end;
-
-	old_start = early_res[i].start;
-	old_end = early_res[i].end;
-	common_start = max(old_start, start);
-	common_end = min(old_end, end);
-
-	/* no overlap ? */
-	if (common_start >= common_end)
-		return;
-
-	if (old_start < common_start) {
-		/* make head segment */
-		early_res[i].end = common_start;
-		if (old_end > common_end) {
-			char name[15];
-
-			/*
-			 * Save a local copy of the name, since the
-			 * early_res array could get resized inside
-			 * reserve_early_without_check() ->
-			 * __check_and_double_early_res(), which would
-			 * make the current name pointer invalid.
-			 */
-			strncpy(name, early_res[i].name,
-					 sizeof(early_res[i].name) - 1);
-			/* add another for left over on tail */
-			reserve_early_without_check(common_end, old_end, name);
-		}
-		return;
-	} else {
-		if (old_end > common_end) {
-			/* reuse the entry for tail left */
-			early_res[i].start = common_end;
-			return;
-		}
-		/* all covered */
-		drop_range(i);
-	}
-}
-
-/*
- * Split any existing ranges that:
- *  1) are marked 'overlap_ok', and
- *  2) overlap with the stated range [start, end)
- * into whatever portion (if any) of the existing range is entirely
- * below or entirely above the stated range.  Drop the portion
- * of the existing range that overlaps with the stated range,
- * which will allow the caller of this routine to then add that
- * stated range without conflicting with any existing range.
- */
-static void __init drop_overlaps_that_are_ok(u64 start, u64 end)
-{
-	int i;
-	struct early_res *r;
-	u64 lower_start, lower_end;
-	u64 upper_start, upper_end;
-	char name[15];
-
-	for (i = 0; i < max_early_res && early_res[i].end; i++) {
-		r = &early_res[i];
-
-		/* Continue past non-overlapping ranges */
-		if (end <= r->start || start >= r->end)
-			continue;
-
-		/*
-		 * Leave non-ok overlaps as is; let caller
-		 * panic "Overlapping early reservations"
-		 * when it hits this overlap.
-		 */
-		if (!r->overlap_ok)
-			return;
-
-		/*
-		 * We have an ok overlap.  We will drop it from the early
-		 * reservation map, and add back in any non-overlapping
-		 * portions (lower or upper) as separate, overlap_ok,
-		 * non-overlapping ranges.
-		 */
-
-		/* 1. Note any non-overlapping (lower or upper) ranges. */
-		strncpy(name, r->name, sizeof(name) - 1);
-
-		lower_start = lower_end = 0;
-		upper_start = upper_end = 0;
-		if (r->start < start) {
-			lower_start = r->start;
-			lower_end = start;
-		}
-		if (r->end > end) {
-			upper_start = end;
-			upper_end = r->end;
-		}
-
-		/* 2. Drop the original ok overlapping range */
-		drop_range(i);
-
-		i--;		/* resume for-loop on copied down entry */
-
-		/* 3. Add back in any non-overlapping ranges. */
-		if (lower_end)
-			reserve_early_overlap_ok(lower_start, lower_end, name);
-		if (upper_end)
-			reserve_early_overlap_ok(upper_start, upper_end, name);
-	}
-}
-
-static void __init __reserve_early(u64 start, u64 end, char *name,
-						int overlap_ok)
-{
-	int i;
-	struct early_res *r;
-
-	i = find_overlapped_early(start, end);
-	if (i >= max_early_res)
-		panic("Too many early reservations");
-	r = &early_res[i];
-	if (r->end)
-		panic("Overlapping early reservations "
-		      "%llx-%llx %s to %llx-%llx %s\n",
-		      start, end - 1, name ? name : "", r->start,
-		      r->end - 1, r->name);
-	r->start = start;
-	r->end = end;
-	r->overlap_ok = overlap_ok;
-	if (name)
-		strncpy(r->name, name, sizeof(r->name) - 1);
-	early_res_count++;
-}
-
-/*
- * A few early reservtations come here.
- *
- * The 'overlap_ok' in the name of this routine does -not- mean it
- * is ok for these reservations to overlap an earlier reservation.
- * Rather it means that it is ok for subsequent reservations to
- * overlap this one.
- *
- * Use this entry point to reserve early ranges when you are doing
- * so out of "Paranoia", reserving perhaps more memory than you need,
- * just in case, and don't mind a subsequent overlapping reservation
- * that is known to be needed.
- *
- * The drop_overlaps_that_are_ok() call here isn't really needed.
- * It would be needed if we had two colliding 'overlap_ok'
- * reservations, so that the second such would not panic on the
- * overlap with the first.  We don't have any such as of this
- * writing, but might as well tolerate such if it happens in
- * the future.
- */
-void __init reserve_early_overlap_ok(u64 start, u64 end, char *name)
-{
-	drop_overlaps_that_are_ok(start, end);
-	__reserve_early(start, end, name, 1);
-}
-
-static void __init __check_and_double_early_res(u64 ex_start, u64 ex_end)
-{
-	u64 start, end, size, mem;
-	struct early_res *new;
-
-	/* do we have enough slots left ? */
-	if ((max_early_res - early_res_count) > max(max_early_res/8, 2))
-		return;
-
-	/* double it */
-	mem = -1ULL;
-	size = sizeof(struct early_res) * max_early_res * 2;
-	if (early_res == early_res_x)
-		start = 0;
-	else
-		start = early_res[0].end;
-	end = ex_start;
-	if (start + size < end)
-		mem = find_fw_memmap_area(start, end, size,
-					 sizeof(struct early_res));
-	if (mem == -1ULL) {
-		start = ex_end;
-		end = get_max_mapped();
-		if (start + size < end)
-			mem = find_fw_memmap_area(start, end, size,
-						 sizeof(struct early_res));
-	}
-	if (mem == -1ULL)
-		panic("can not find more space for early_res array");
-
-	new = __va(mem);
-	/* save the first one for own */
-	new[0].start = mem;
-	new[0].end = mem + size;
-	new[0].overlap_ok = 0;
-	/* copy old to new */
-	if (early_res == early_res_x) {
-		memcpy(&new[1], &early_res[0],
-			 sizeof(struct early_res) * max_early_res);
-		memset(&new[max_early_res+1], 0,
-			 sizeof(struct early_res) * (max_early_res - 1));
-		early_res_count++;
-	} else {
-		memcpy(&new[1], &early_res[1],
-			 sizeof(struct early_res) * (max_early_res - 1));
-		memset(&new[max_early_res], 0,
-			 sizeof(struct early_res) * max_early_res);
-	}
-	memset(&early_res[0], 0, sizeof(struct early_res) * max_early_res);
-	early_res = new;
-	max_early_res *= 2;
-	printk(KERN_DEBUG "early_res array is doubled to %d at [%llx - %llx]\n",
-		max_early_res, mem, mem + size - 1);
-}
-
-/*
- * Most early reservations come here.
- *
- * We first have drop_overlaps_that_are_ok() drop any pre-existing
- * 'overlap_ok' ranges, so that we can then reserve this memory
- * range without risk of panic'ing on an overlapping overlap_ok
- * early reservation.
- */
-void __init reserve_early(u64 start, u64 end, char *name)
-{
-	if (start >= end)
-		return;
-
-	__check_and_double_early_res(start, end);
-
-	drop_overlaps_that_are_ok(start, end);
-	__reserve_early(start, end, name, 0);
-}
-
-void __init reserve_early_without_check(u64 start, u64 end, char *name)
-{
-	struct early_res *r;
-
-	if (start >= end)
-		return;
-
-	__check_and_double_early_res(start, end);
-
-	r = &early_res[early_res_count];
-
-	r->start = start;
-	r->end = end;
-	r->overlap_ok = 0;
-	if (name)
-		strncpy(r->name, name, sizeof(r->name) - 1);
-	early_res_count++;
-}
-
-void __init free_early(u64 start, u64 end)
-{
-	struct early_res *r;
-	int i;
-
-	i = find_overlapped_early(start, end);
-	r = &early_res[i];
-	if (i >= max_early_res || r->end != end || r->start != start)
-		panic("free_early on not reserved area: %llx-%llx!",
-			 start, end - 1);
-
-	drop_range(i);
-}
-
-void __init free_early_partial(u64 start, u64 end)
-{
-	struct early_res *r;
-	int i;
-
-	if (start == end)
-		return;
-
-	if (WARN_ONCE(start > end, "  wrong range [%#llx, %#llx]\n", start, end))
-		return;
-
-try_next:
-	i = find_overlapped_early(start, end);
-	if (i >= max_early_res)
-		return;
-
-	r = &early_res[i];
-	/* hole ? */
-	if (r->end >= end && r->start <= start) {
-		drop_range_partial(i, start, end);
-		return;
-	}
-
-	drop_range_partial(i, start, end);
-	goto try_next;
-}
-
-#ifdef CONFIG_NO_BOOTMEM
-static void __init subtract_early_res(struct range *range, int az)
-{
-	int i, count;
-	u64 final_start, final_end;
-	int idx = 0;
-
-	count  = 0;
-	for (i = 0; i < max_early_res && early_res[i].end; i++)
-		count++;
-
-	/* need to skip first one ?*/
-	if (early_res != early_res_x)
-		idx = 1;
-
-#define DEBUG_PRINT_EARLY_RES 1
-
-#if DEBUG_PRINT_EARLY_RES
-	printk(KERN_INFO "Subtract (%d early reservations)\n", count);
-#endif
-	for (i = idx; i < count; i++) {
-		struct early_res *r = &early_res[i];
-#if DEBUG_PRINT_EARLY_RES
-		printk(KERN_INFO "  #%d [%010llx - %010llx] %15s\n", i,
-			r->start, r->end, r->name);
-#endif
-		final_start = PFN_DOWN(r->start);
-		final_end = PFN_UP(r->end);
-		if (final_start >= final_end)
-			continue;
-		subtract_range(range, az, final_start, final_end);
-	}
-
-}
-
-int __init get_free_all_memory_range(struct range **rangep, int nodeid)
-{
-	int i, count;
-	u64 start = 0, end;
-	u64 size;
-	u64 mem;
-	struct range *range;
-	int nr_range;
-
-	count  = 0;
-	for (i = 0; i < max_early_res && early_res[i].end; i++)
-		count++;
-
-	count *= 2;
-
-	size = sizeof(struct range) * count;
-	end = get_max_mapped();
-#ifdef MAX_DMA32_PFN
-	if (end > (MAX_DMA32_PFN << PAGE_SHIFT))
-		start = MAX_DMA32_PFN << PAGE_SHIFT;
-#endif
-	mem = find_fw_memmap_area(start, end, size, sizeof(struct range));
-	if (mem == -1ULL)
-		panic("can not find more space for range free");
-
-	range = __va(mem);
-	/* use early_node_map[] and early_res to get range array at first */
-	memset(range, 0, size);
-	nr_range = 0;
-
-	/* need to go over early_node_map to find out good range for node */
-	nr_range = add_from_early_node_map(range, count, nr_range, nodeid);
-#ifdef CONFIG_X86_32
-	subtract_range(range, count, max_low_pfn, -1ULL);
-#endif
-	subtract_early_res(range, count);
-	nr_range = clean_sort_range(range, count);
-
-	/* need to clear it ? */
-	if (nodeid == MAX_NUMNODES) {
-		memset(&early_res[0], 0,
-			 sizeof(struct early_res) * max_early_res);
-		early_res = NULL;
-		max_early_res = 0;
-	}
-
-	*rangep = range;
-	return nr_range;
-}
-#else
-void __init early_res_to_bootmem(u64 start, u64 end)
-{
-	int i, count;
-	u64 final_start, final_end;
-	int idx = 0;
-
-	count  = 0;
-	for (i = 0; i < max_early_res && early_res[i].end; i++)
-		count++;
-
-	/* need to skip first one ?*/
-	if (early_res != early_res_x)
-		idx = 1;
-
-	printk(KERN_INFO "(%d/%d early reservations) ==> bootmem [%010llx - %010llx]\n",
-			 count - idx, max_early_res, start, end);
-	for (i = idx; i < count; i++) {
-		struct early_res *r = &early_res[i];
-		printk(KERN_INFO "  #%d [%010llx - %010llx] %16s", i,
-			r->start, r->end, r->name);
-		final_start = max(start, r->start);
-		final_end = min(end, r->end);
-		if (final_start >= final_end) {
-			printk(KERN_CONT "\n");
-			continue;
-		}
-		printk(KERN_CONT " ==> [%010llx - %010llx]\n",
-			final_start, final_end);
-		reserve_bootmem_generic(final_start, final_end - final_start,
-				BOOTMEM_DEFAULT);
-	}
-	/* clear them */
-	memset(&early_res[0], 0, sizeof(struct early_res) * max_early_res);
-	early_res = NULL;
-	max_early_res = 0;
-	early_res_count = 0;
-}
-#endif
-
-/* Check for already reserved areas */
-static inline int __init bad_addr(u64 *addrp, u64 size, u64 align)
-{
-	int i;
-	u64 addr = *addrp;
-	int changed = 0;
-	struct early_res *r;
-again:
-	i = find_overlapped_early(addr, addr + size);
-	r = &early_res[i];
-	if (i < max_early_res && r->end) {
-		*addrp = addr = round_up(r->end, align);
-		changed = 1;
-		goto again;
-	}
-	return changed;
-}
-
-/* Check for already reserved areas */
-static inline int __init bad_addr_size(u64 *addrp, u64 *sizep, u64 align)
-{
-	int i;
-	u64 addr = *addrp, last;
-	u64 size = *sizep;
-	int changed = 0;
-again:
-	last = addr + size;
-	for (i = 0; i < max_early_res && early_res[i].end; i++) {
-		struct early_res *r = &early_res[i];
-		if (last > r->start && addr < r->start) {
-			size = r->start - addr;
-			changed = 1;
-			goto again;
-		}
-		if (last > r->end && addr < r->end) {
-			addr = round_up(r->end, align);
-			size = last - addr;
-			changed = 1;
-			goto again;
-		}
-		if (last <= r->end && addr >= r->start) {
-			(*sizep)++;
-			return 0;
-		}
-	}
-	if (changed) {
-		*addrp = addr;
-		*sizep = size;
-	}
-	return changed;
-}
-
-/*
- * Find a free area with specified alignment in a specific range.
- * only with the area.between start to end is active range from early_node_map
- * so they are good as RAM
- */
-u64 __init find_early_area(u64 ei_start, u64 ei_last, u64 start, u64 end,
-			 u64 size, u64 align)
-{
-	u64 addr, last;
-
-	addr = round_up(ei_start, align);
-	if (addr < start)
-		addr = round_up(start, align);
-	if (addr >= ei_last)
-		goto out;
-	while (bad_addr(&addr, size, align) && addr+size <= ei_last)
-		;
-	last = addr + size;
-	if (last > ei_last)
-		goto out;
-	if (last > end)
-		goto out;
-
-	return addr;
-
-out:
-	return -1ULL;
-}
-
-u64 __init find_early_area_size(u64 ei_start, u64 ei_last, u64 start,
-			 u64 *sizep, u64 align)
-{
-	u64 addr, last;
-
-	addr = round_up(ei_start, align);
-	if (addr < start)
-		addr = round_up(start, align);
-	if (addr >= ei_last)
-		goto out;
-	*sizep = ei_last - addr;
-	while (bad_addr_size(&addr, sizep, align) && addr + *sizep <= ei_last)
-		;
-	last = addr + *sizep;
-	if (last > ei_last)
-		goto out;
-
-	return addr;
-
-out:
-	return -1ULL;
-}
-- 
1.6.4.2

[PATCH 22/25] x86, lmb: Use lmb_memory_size()/lmb_free_memory_size() to get correct dma_reserve

[Yinghai Lu]

lmb_memory_size() will return memory size in lmb.memory.region.
lmb_free_memory_size() will return free memory size in lmb.memory.region.

So We can get exact reseved size in specified range.

Set the size right after initmem_init(), because later bootmem API will
get area above 16M. (except some fallback).

Later after we remove the bootmem, We could call that just before paging_init().

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/include/asm/e820.h |    2 ++
 arch/x86/kernel/e820.c      |   17 +++++++++++++++++
 arch/x86/kernel/setup.c     |    1 +
 arch/x86/mm/init_64.c       |    7 -------
 4 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/arch/x86/include/asm/e820.h b/arch/x86/include/asm/e820.h
index 6fbd8cd..f59db16 100644
--- a/arch/x86/include/asm/e820.h
+++ b/arch/x86/include/asm/e820.h
@@ -118,6 +118,8 @@ extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align);
 
 void init_lmb_memory(void);
 void fill_lmb_memory(void);
+void find_lmb_dma_reserve(void);
+
 extern void finish_e820_parsing(void);
 extern void e820_reserve_resources(void);
 extern void e820_reserve_resources_late(void);
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index c8edb78..c09b84b 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -1110,3 +1110,20 @@ void __init fill_lmb_memory(void)
 	lmb_analyze();
 	lmb_dump_all();
 }
+
+void __init find_lmb_dma_reserve(void)
+{
+#ifdef CONFIG_X86_64
+	u64 free_size_pfn;
+	u64 mem_size_pfn;
+	/*
+	 * need to find out used area below MAX_DMA_PFN
+	 * need to use lmb to get free size in [0, MAX_DMA_PFN]
+	 * at first, and assume boot_mem will not take below MAX_DMA_PFN
+	 */
+	mem_size_pfn = lmb_memory_in_range(0, MAX_DMA_PFN << PAGE_SHIFT) >> PAGE_SHIFT;
+	free_size_pfn = lmb_free_memory_in_range(0, MAX_DMA_PFN << PAGE_SHIFT) >> PAGE_SHIFT;
+	set_dma_reserve(mem_size_pfn - free_size_pfn);
+#endif
+}
+
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index ba3f94c..426b217 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1019,6 +1019,7 @@ void __init setup_arch(char **cmdline_p)
 #endif
 
 	initmem_init(0, max_pfn, acpi, k8);
+	find_lmb_dma_reserve();
 #ifndef CONFIG_NO_BOOTMEM
 	lmb_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
 #endif
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index bb9315f..abb79de 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -53,8 +53,6 @@
 #include <asm/init.h>
 #include <linux/bootmem.h>
 
-static unsigned long dma_reserve __initdata;
-
 static int __init parse_direct_gbpages_off(char *arg)
 {
 	direct_gbpages = 0;
@@ -821,11 +819,6 @@ int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
 
 	reserve_bootmem(phys, len, flags);
 
-	if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) {
-		dma_reserve += len / PAGE_SIZE;
-		set_dma_reserve(dma_reserve);
-	}
-
 	return 0;
 }
 #endif
-- 
1.6.4.2

[PATCH 23/25] x86: Have nobootmem version setup_bootmem_allocator()

[Yinghai Lu]

We can reduce #ifdef number from 3 to one in init_32.c

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/mm/init_32.c |   15 ++++++++++-----
 1 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index e3ae067..f172aa3 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -771,11 +771,9 @@ static unsigned long __init setup_node_bootmem(int nodeid,
 
 	return bootmap + bootmap_size;
 }
-#endif
 
 void __init setup_bootmem_allocator(void)
 {
-#ifndef CONFIG_NO_BOOTMEM
 	int nodeid;
 	unsigned long bootmap_size, bootmap;
 	/*
@@ -787,13 +785,11 @@ void __init setup_bootmem_allocator(void)
 	if (bootmap == (unsigned long)LMB_ERROR)
 		panic("Cannot find bootmem map of size %ld\n", bootmap_size);
 	lmb_reserve_range(bootmap, bootmap + bootmap_size, "BOOTMAP");
-#endif
 
 	printk(KERN_INFO "  mapped low ram: 0 - %08lx\n",
 		 max_pfn_mapped<<PAGE_SHIFT);
 	printk(KERN_INFO "  low ram: 0 - %08lx\n", max_low_pfn<<PAGE_SHIFT);
 
-#ifndef CONFIG_NO_BOOTMEM
 	for_each_online_node(nodeid) {
 		 unsigned long start_pfn, end_pfn;
 
@@ -811,10 +807,19 @@ void __init setup_bootmem_allocator(void)
 		bootmap = setup_node_bootmem(nodeid, start_pfn, end_pfn,
 						 bootmap);
 	}
-#endif
 
 	after_bootmem = 1;
 }
+#else
+void __init setup_bootmem_allocator(void)
+{
+	printk(KERN_INFO "  mapped low ram: 0 - %08lx\n",
+		 max_pfn_mapped<<PAGE_SHIFT);
+	printk(KERN_INFO "  low ram: 0 - %08lx\n", max_low_pfn<<PAGE_SHIFT);
+
+	after_bootmem = 1;
+}
+#endif
 
 /*
  * paging_init() sets up the page tables - note that the first 8MB are
-- 
1.6.4.2

[PATCH 24/25] x86: Put 64 bit numa node memmap above 16M

[Yinghai Lu]

Do not use 0x8000 hard code value anymore.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/mm/numa_64.c |    2 +-
 arch/x86/mm/srat_64.c |    4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index 92c01a5..93a1e07 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -85,7 +85,7 @@ static int __init allocate_cachealigned_memnodemap(void)
 	if (memnodemapsize <= ARRAY_SIZE(memnode.embedded_map))
 		return 0;
 
-	addr = 0x8000;
+	addr = __pa(MAX_DMA_ADDRESS);
 	nodemap_size = roundup(sizeof(s16) * memnodemapsize, L1_CACHE_BYTES);
 	nodemap_addr = lmb_find_in_range(addr, max_pfn<<PAGE_SHIFT,
 				      nodemap_size, L1_CACHE_BYTES);
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index 8f82c80..1f9b7b7 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -99,8 +99,8 @@ void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
 	unsigned long phys;
 
 	length = slit->header.length;
-	phys = lmb_find_in_range(0, max_pfn_mapped<<PAGE_SHIFT, length,
-		 PAGE_SIZE);
+	phys = lmb_find_in_range(__pa(MAX_DMA_ADDRESS), max_pfn_mapped<<PAGE_SHIFT,
+				 length, PAGE_SIZE);
 
 	if (phys == (unsigned long)LMB_ERROR)
 		panic(" Can not save slit!\n");
-- 
1.6.4.2

[PATCH 25/25] swiotlb: Use page alignment for early buffer allocation

[Yinghai Lu]

for 2.6.34

We could call free_bootmem_late() if swiotlb is not used, and
it will shrink to page alignement.

So alloc them with page alignment at first, to avoid lose two pages

before patch:
[    0.000000]     lmb_reserve_range: [00d3600000, 00d7600000]   swiotlb buffer
[    0.000000]     lmb_reserve_range: [00d7e7ef40, 00d7e9ef40]     swiotlb list
[    0.000000]     lmb_reserve_range: [00d7e3ef40, 00d7e7ef40]  swiotlb orig_ad
[    0.000000]     lmb_reserve_range: [000008a000, 0000092000]  swiotlb overflo

after patch will get
[    0.000000]     lmb_reserve_range: [00d3600000, 00d7600000]   swiotlb buffer
[    0.000000]     lmb_reserve_range: [00d7e7e000, 00d7e9e000]     swiotlb list
[    0.000000]     lmb_reserve_range: [00d7e3e000, 00d7e7e000]  swiotlb orig_ad
[    0.000000]     lmb_reserve_range: [000008a000, 0000092000]  swiotlb overflo

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Becky Bruce <beckyb@kernel.crashing.org>
---
 lib/swiotlb.c |   16 ++++++++--------
 1 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index a009055..ecfab7f 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -159,7 +159,7 @@ swiotlb_init_with_default_size(size_t default_size, int verbose)
 	/*
 	 * Get IO TLB memory from the low pages
 	 */
-	io_tlb_start = alloc_bootmem_low_pages(bytes);
+	io_tlb_start = alloc_bootmem_low_pages(PAGE_ALIGN(bytes));
 	if (!io_tlb_start)
 		panic("Cannot allocate SWIOTLB buffer");
 	io_tlb_end = io_tlb_start + bytes;
@@ -169,16 +169,16 @@ swiotlb_init_with_default_size(size_t default_size, int verbose)
 	 * to find contiguous free memory regions of size up to IO_TLB_SEGSIZE
 	 * between io_tlb_start and io_tlb_end.
 	 */
-	io_tlb_list = alloc_bootmem(io_tlb_nslabs * sizeof(int));
+	io_tlb_list = alloc_bootmem_pages(PAGE_ALIGN(io_tlb_nslabs * sizeof(int)));
 	for (i = 0; i < io_tlb_nslabs; i++)
  		io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE);
 	io_tlb_index = 0;
-	io_tlb_orig_addr = alloc_bootmem(io_tlb_nslabs * sizeof(phys_addr_t));
+	io_tlb_orig_addr = alloc_bootmem_pages(PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)));
 
 	/*
 	 * Get the overflow emergency buffer
 	 */
-	io_tlb_overflow_buffer = alloc_bootmem_low(io_tlb_overflow);
+	io_tlb_overflow_buffer = alloc_bootmem_low_pages(PAGE_ALIGN(io_tlb_overflow));
 	if (!io_tlb_overflow_buffer)
 		panic("Cannot allocate SWIOTLB overflow buffer!\n");
 	if (verbose)
@@ -304,13 +304,13 @@ void __init swiotlb_free(void)
 			   get_order(io_tlb_nslabs << IO_TLB_SHIFT));
 	} else {
 		free_bootmem_late(__pa(io_tlb_overflow_buffer),
-				  io_tlb_overflow);
+				  PAGE_ALIGN(io_tlb_overflow));
 		free_bootmem_late(__pa(io_tlb_orig_addr),
-				  io_tlb_nslabs * sizeof(phys_addr_t));
+				  PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)));
 		free_bootmem_late(__pa(io_tlb_list),
-				  io_tlb_nslabs * sizeof(int));
+				  PAGE_ALIGN(io_tlb_nslabs * sizeof(int)));
 		free_bootmem_late(__pa(io_tlb_start),
-				  io_tlb_nslabs << IO_TLB_SHIFT);
+				  PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT));
 	}
 }
 
-- 
1.6.4.2

Re: [PATCH 05/25] lmb: Prepare to include linux/lmb.h in core file

[Sam Ravnborg]

On Tue, Jun 22, 2010 at 10:26:34AM -0700, Yinghai Lu wrote:
> Need to add protection in linux/lmb.h, to prepare to include it in
>  mm/page_alloc.c and mm/bootmem.c etc.
> 
> Signed-off-by: Yinghai Lu <yinghai@kernel.org>
> ---
>  include/linux/lmb.h |    3 +++
>  1 files changed, 3 insertions(+), 0 deletions(-)
> 
> diff --git a/include/linux/lmb.h b/include/linux/lmb.h
> index eb8a5a3..d529232 100644
> --- a/include/linux/lmb.h
> +++ b/include/linux/lmb.h
> @@ -2,6 +2,7 @@
>  #define _LINUX_LMB_H
>  #ifdef __KERNEL__
>  
> +#ifdef CONFIG_HAVE_LMB

The file could loose the "#ifdef __KERNEL__"
as lmb.h is not exported to userspace.

	Sam

Re: [PATCH 03/25] lmb: Print new doubled array location info

[Bjorn Helgaas]

On Tuesday, June 22, 2010 11:26:32 am Yinghai Lu wrote:
> +	if (lmb_debug)
> +		pr_info("lmb: %s array is doubled to %ld at %llx - %llx",
> +			 lmb_type_name(type), type->max * 2, (u64)addr, (u64)addr + new_size);

Please print this memory range the same way we print resources, e.g.,
"%#010llx-%#010llx", with "addr" and "addr + new_size - 1".

Re: [PATCH 10/25] x86, lmb: Add lmb_to_bootmem()

[Bjorn Helgaas]

On Tuesday, June 22, 2010 11:26:39 am Yinghai Lu wrote:
> +	pr_info("(%d early reservations) ==> bootmem [%010llx - %010llx]\n", count, start, end);

Please make all these address range messages match the %pR format.

> +	for_each_lmb(reserved, r) {
> +		pr_info("  [%010llx - %010llx] ", (u64)r->base, (u64)r->base + r->size);
> +		final_start = max(start, r->base);
> +		final_end = min(end, r->base + r->size);
> +		if (final_start >= final_end) {
> +			pr_cont("\n");
> +			continue;
> +		}
> +		pr_cont(" ==> [%010llx - %010llx]\n", final_start, final_end);
> +		reserve_bootmem_generic(final_start, final_end - final_start, BOOTMEM_DEFAULT);
> +	}
> +
> +	/* Put region array back ? */
> +	if (lmb.reserved.regions != lmb_reserved_init_regions)
> +		lmb_reserve(__pa(lmb.reserved.regions), sizeof(struct lmb_region) * lmb.reserved.max);
> +}
> +#endif
> 

Re: [PATCH 11/25] x86,lmb: Add lmb_reserve_range/lmb_free_range

[Bjorn Helgaas]

On Tuesday, June 22, 2010 11:26:40 am Yinghai Lu wrote:

> +void __init lmb_reserve_range(u64 start, u64 end, char *name)
> +{
> +	if (start == end)
> +		return;
> +
> +	if (WARN_ONCE(start > end, "lmb_reserve_range: wrong range [%#llx, %#llx]\n", start, end))

Please use %pR format.

> +		return;
> +
> +	lmb_reserve(start, end - start);
> +}
> +
> +void __init lmb_free_range(u64 start, u64 end)
> +{
> +	if (start == end)
> +		return;
> +
> +	if (WARN_ONCE(start > end, "lmb_free_range: wrong range [%#llx, %#llx]\n", start, end))
> +		return;
> +
> +	lmb_free(start, end - start);
> +}
> 

Re: [PATCH 12/25] x86, lmb: Add get_free_all_memory_range()

[Bjorn Helgaas]

On Tuesday, June 22, 2010 11:26:41 am Yinghai Lu wrote:

> +	pr_info("Subtract (%d early reservations)\n", count);
> +
> +	for_each_lmb(reserved, r) {
> +		pr_info("  [%010llx - %010llx]\n", (u64)r->base, (u64)r->base + r->size);

Use %pR format and consider adding text to the line, e.g.,
"lmb: early reservation [%#010llx-%#010llx] removed" so that
grep output is useful all by itself, without requiring the
context of the preceding lines.

> +		final_start = PFN_DOWN(r->base);
> +		final_end = PFN_UP(r->base + r->size);
> +		if (final_start >= final_end)
> +			continue;
> +		subtract_range(range, az, final_start, final_end);
> +	}
> +	/* Put region array back ? */
> +	if (lmb.reserved.regions != lmb_reserved_init_regions)
> +		lmb_reserve(__pa(lmb.reserved.regions), sizeof(struct lmb_region) * lmb.reserved.max);
> +}
> +
> +struct count_data {
> +	int nr;
> +};
> +
> +static int __init count_work_fn(unsigned long start_pfn,
> +				unsigned long end_pfn, void *datax)
> +{
> +	struct count_data *data = datax;
> +
> +	data->nr++;
> +
> +	return 0;
> +}
> +
> +static int __init count_early_node_map(int nodeid)
> +{
> +	struct count_data data;
> +
> +	data.nr = 0;
> +	work_with_active_regions(nodeid, count_work_fn, &data);
> +
> +	return data.nr;
> +}
> +
> +int __init get_free_all_memory_range(struct range **rangep, int nodeid)
> +{
> +	int count;
> +	struct range *range;
> +	int nr_range;
> +
> +	count = (lmb.reserved.cnt + count_early_node_map(nodeid)) * 2;
> +
> +	range = find_range_array(count);
> +	nr_range = 0;
> +
> +	/*
> +	 * Use early_node_map[] and lmb.reserved.region to get range array
> +	 * at first
> +	 */
> +	nr_range = add_from_early_node_map(range, count, nr_range, nodeid);
> +#ifdef CONFIG_X86_32
> +	subtract_range(range, count, max_low_pfn, -1ULL);
> +#endif
> +	subtract_lmb_reserved(range, count);
> +	nr_range = clean_sort_range(range, count);
> +
> +	*rangep = range;
> +	return nr_range;
> +}
> +#else
>  void __init lmb_to_bootmem(u64 start, u64 end)
>  {
>  	int count;
> 

Re: [PATCH 18/25] x86, lmb: Use lmb_debug to control debug message print out

[Bjorn Helgaas]

On Tuesday, June 22, 2010 11:26:47 am Yinghai Lu wrote:
> Also let lmb_reserve_range/lmb_free_range could print out name if lmb=debug is
> specified
> 
> will also print ther name when reserve_lmb_area/free_lmb_area are called.
> 
> Signed-off-by: Yinghai Lu <yinghai@kernel.org>
> ---
>  arch/x86/mm/lmb.c |   24 ++++++++++++++++++------
>  1 files changed, 18 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/x86/mm/lmb.c b/arch/x86/mm/lmb.c
> index bd2f60b..209f25b 100644
> --- a/arch/x86/mm/lmb.c
> +++ b/arch/x86/mm/lmb.c
> @@ -122,10 +122,12 @@ static void __init subtract_lmb_reserved(struct range *range, int az)
>  
>  	count  = lmb.reserved.cnt;
>  
> -	pr_info("Subtract (%d early reservations)\n", count);
> +	if (lmb_debug)
> +		pr_info("Subtract (%d early reservations)\n", count);
>  
>  	for_each_lmb(reserved, r) {
> -		pr_info("  [%010llx - %010llx]\n", (u64)r->base, (u64)r->base + r->size);

Use %pR format (looks like this is rework on top of a previous patch,
so this comment is probably redundant).

> +		if (lmb_debug)
> +			pr_info("  [%010llx - %010llx]\n", (u64)r->base, (u64)r->base + r->size);
>  		final_start = PFN_DOWN(r->base);
>  		final_end = PFN_UP(r->base + r->size);
>  		if (final_start >= final_end)
> @@ -198,16 +200,20 @@ void __init lmb_to_bootmem(u64 start, u64 end)
>  		lmb_free(__pa(lmb.reserved.regions), sizeof(struct lmb_region) * lmb.reserved.max);
>  
>  	count  = lmb.reserved.cnt;
> -	pr_info("(%d early reservations) ==> bootmem [%010llx - %010llx]\n", count, start, end);
> +	if (lmb_debug)
> +		pr_info("(%d early reservations) ==> bootmem [%010llx - %010llx]\n", count, start, end);
>  	for_each_lmb(reserved, r) {
> -		pr_info("  [%010llx - %010llx] ", (u64)r->base, (u64)r->base + r->size);
> +		if (lmb_debug)
> +			pr_info("  [%010llx - %010llx] ", (u64)r->base, (u64)r->base + r->size);
>  		final_start = max(start, r->base);
>  		final_end = min(end, r->base + r->size);
>  		if (final_start >= final_end) {
> -			pr_cont("\n");
> +			if (lmb_debug)
> +				pr_cont("\n");
>  			continue;
>  		}
> -		pr_cont(" ==> [%010llx - %010llx]\n", final_start, final_end);
> +		if (lmb_debug)
> +			pr_cont(" ==> [%010llx - %010llx]\n", final_start, final_end);
>  		reserve_bootmem_generic(final_start, final_end - final_start, BOOTMEM_DEFAULT);
>  	}
>  
> @@ -289,6 +295,9 @@ void __init lmb_reserve_range(u64 start, u64 end, char *name)
>  	if (WARN_ONCE(start > end, "lmb_reserve_range: wrong range [%#llx, %#llx]\n", start, end))
>  		return;
>  
> +	if (lmb_debug)
> +		pr_info("    lmb_reserve_range: [%010llx, %010llx] %16s\n", start, end, name);
> +
>  	lmb_reserve(start, end - start);
>  }
>  
> @@ -300,6 +309,9 @@ void __init lmb_free_range(u64 start, u64 end)
>  	if (WARN_ONCE(start > end, "lmb_free_range: wrong range [%#llx, %#llx]\n", start, end))
>  		return;
>  
> +	if (lmb_debug)
> +		pr_info("       lmb_free_range: [%010llx, %010llx]\n", start, end);
> +
>  	lmb_free(start, end - start);
>  }
>  
> 

Re: [PATCH 23/25] x86: Have nobootmem version setup_bootmem_allocator()

[Bjorn Helgaas]

On Tuesday, June 22, 2010 11:26:52 am Yinghai Lu wrote:
> We can reduce #ifdef number from 3 to one in init_32.c
> 
> Signed-off-by: Yinghai Lu <yinghai@kernel.org>
> ---
>  arch/x86/mm/init_32.c |   15 ++++++++++-----
>  1 files changed, 10 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
> index e3ae067..f172aa3 100644
> --- a/arch/x86/mm/init_32.c
> +++ b/arch/x86/mm/init_32.c
> @@ -771,11 +771,9 @@ static unsigned long __init setup_node_bootmem(int nodeid,
>  
>  	return bootmap + bootmap_size;
>  }
> -#endif
>  
>  void __init setup_bootmem_allocator(void)
>  {
> -#ifndef CONFIG_NO_BOOTMEM
>  	int nodeid;
>  	unsigned long bootmap_size, bootmap;
>  	/*
> @@ -787,13 +785,11 @@ void __init setup_bootmem_allocator(void)
>  	if (bootmap == (unsigned long)LMB_ERROR)
>  		panic("Cannot find bootmem map of size %ld\n", bootmap_size);
>  	lmb_reserve_range(bootmap, bootmap + bootmap_size, "BOOTMAP");
> -#endif
>  
>  	printk(KERN_INFO "  mapped low ram: 0 - %08lx\n",
>  		 max_pfn_mapped<<PAGE_SHIFT);
>  	printk(KERN_INFO "  low ram: 0 - %08lx\n", max_low_pfn<<PAGE_SHIFT);
>  
> -#ifndef CONFIG_NO_BOOTMEM
>  	for_each_online_node(nodeid) {
>  		 unsigned long start_pfn, end_pfn;
>  
> @@ -811,10 +807,19 @@ void __init setup_bootmem_allocator(void)
>  		bootmap = setup_node_bootmem(nodeid, start_pfn, end_pfn,
>  						 bootmap);
>  	}
> -#endif
>  
>  	after_bootmem = 1;
>  }
> +#else
> +void __init setup_bootmem_allocator(void)
> +{
> +	printk(KERN_INFO "  mapped low ram: 0 - %08lx\n",
> +		 max_pfn_mapped<<PAGE_SHIFT);
> +	printk(KERN_INFO "  low ram: 0 - %08lx\n", max_low_pfn<<PAGE_SHIFT);

Please use %pR format here and fix up the other printks above in the
other #ifdef branch.

> +
> +	after_bootmem = 1;
> +}
> +#endif
>  
>  /*
>   * paging_init() sets up the page tables - note that the first 8MB are
> 

Re: [PATCH -v19 00/25] Use lmb with x86

[Bjorn Helgaas]

On Tuesday, June 22, 2010 11:26:29 am Yinghai Lu wrote:
> New lmb could be used to replace early_res in x86.

Since you're fiddling in e820 anyway, can you fix places like
e820_print_map() so they use the %pR format?  I think it'd be
cleaner if e820_print_type() just returned a string pointer
rather than calling printk directly.  Then we'd only need a
single printk per region and wouldn't need the KERN_CONT junk.

Re: [PATCH 03/25] lmb: Print new doubled array location info

[H. Peter Anvin]

On 06/29/2010 10:44 AM, Bjorn Helgaas wrote:
> On Tuesday, June 22, 2010 11:26:32 am Yinghai Lu wrote:
>> +	if (lmb_debug)
>> +		pr_info("lmb: %s array is doubled to %ld at %llx - %llx",
>> +			 lmb_type_name(type), type->max * 2, (u64)addr, (u64)addr + new_size);
> 
> Please print this memory range the same way we print resources, e.g.,
> "%#010llx-%#010llx", with "addr" and "addr + new_size - 1".

*Ten* hex digits?

	-hpa

Re: [PATCH 03/25] lmb: Print new doubled array location info

[Bjorn Helgaas]

On Tuesday, June 29, 2010 12:38:44 pm H. Peter Anvin wrote:
> On 06/29/2010 10:44 AM, Bjorn Helgaas wrote:
> > On Tuesday, June 22, 2010 11:26:32 am Yinghai Lu wrote:
> >> +	if (lmb_debug)
> >> +		pr_info("lmb: %s array is doubled to %ld at %llx - %llx",
> >> +			 lmb_type_name(type), type->max * 2, (u64)addr, (u64)addr + new_size);
> > 
> > Please print this memory range the same way we print resources, e.g.,
> > "%#010llx-%#010llx", with "addr" and "addr + new_size - 1".
> 
> *Ten* hex digits?

I think that width includes the "0x" prefix, so it's really eight digits.

Re: [PATCH 03/25] lmb: Print new doubled array location info

[Yinghai Lu]

On 06/29/2010 10:44 AM, Bjorn Helgaas wrote:
> On Tuesday, June 22, 2010 11:26:32 am Yinghai Lu wrote:
>> +	if (lmb_debug)
>> +		pr_info("lmb: %s array is doubled to %ld at %llx - %llx",
>> +			 lmb_type_name(type), type->max * 2, (u64)addr, (u64)addr + new_size);
> 
> Please print this memory range the same way we print resources, e.g.,
> "%#010llx-%#010llx", with "addr" and "addr + new_size - 1".

ok, I will put # for 0x.

but i like to have

xxx - yyy : to include end
[xxx, yyy - 1]

just like current e820 print out.
and it would be more readable without too many ffff

Thanks

Yinghai

Re: [PATCH 03/25] lmb: Print new doubled array location info

[Bjorn Helgaas]

On Tuesday, June 29, 2010 02:03:21 pm Yinghai Lu wrote:
> On 06/29/2010 10:44 AM, Bjorn Helgaas wrote:
> > On Tuesday, June 22, 2010 11:26:32 am Yinghai Lu wrote:
> >> +	if (lmb_debug)
> >> +		pr_info("lmb: %s array is doubled to %ld at %llx - %llx",
> >> +			 lmb_type_name(type), type->max * 2, (u64)addr, (u64)addr + new_size);
> > 
> > Please print this memory range the same way we print resources, e.g.,
> > "%#010llx-%#010llx", with "addr" and "addr + new_size - 1".
> 
> ok, I will put # for 0x.
> 
> but i like to have
> 
> xxx - yyy : to include end
> [xxx, yyy - 1]
> 
> just like current e820 print out.
> and it would be more readable without too many ffff

I think it's stupid to use two different conventions for printing
address ranges.  That just makes extra mental work for people
comparing e820 ranges with %pR resources.

I don't personally care that much whether we pick the convention of
including the end (like the current e820 output) or the convention of
excluding it (like %pR and /proc/iomem do), but whatever we pick, we
should use it consistently.

To me, the fact that /proc/iomem is user-visible and excludes the end
is a pretty strong argument for adopting that convention.

And I think you should remove the extra spaces in "xxx - yyy".
There's no reason to be different when we could be consistent.

Bjorn