From: Christian Borntraeger <borntraeger@de.ibm.com> To: akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, x86@kernel.org, linuxppc-dev@lists.ozlabs.org, davem@davemloft.net, Joonsoo Kim <iamjoonsoo.kim@lge.com>, davej@codemonkey.org.uk, Christian Borntraeger <borntraeger@de.ibm.com> Subject: [PATCH v3 3/3] s390: query dynamic DEBUG_PAGEALLOC setting Date: Wed, 27 Jan 2016 11:10:01 +0100 [thread overview] Message-ID: <1453889401-43496-4-git-send-email-borntraeger@de.ibm.com> (raw) In-Reply-To: <1453889401-43496-1-git-send-email-borntraeger@de.ibm.com> We can use debug_pagealloc_enabled() to check if we can map the identity mapping with 1MB/2GB pages as well as to print the current setting in dump_stack. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> --- arch/s390/kernel/dumpstack.c | 6 +++--- arch/s390/mm/vmem.c | 10 ++++------ 2 files changed, 7 insertions(+), 9 deletions(-) diff --git a/arch/s390/kernel/dumpstack.c b/arch/s390/kernel/dumpstack.c index dc8e204..e57eb22 100644 --- a/arch/s390/kernel/dumpstack.c +++ b/arch/s390/kernel/dumpstack.c @@ -11,6 +11,7 @@ #include <linux/export.h> #include <linux/kdebug.h> #include <linux/ptrace.h> +#include <linux/mm.h> #include <linux/module.h> #include <linux/sched.h> #include <asm/processor.h> @@ -185,9 +186,8 @@ void die(struct pt_regs *regs, const char *str) #ifdef CONFIG_SMP printk("SMP "); #endif -#ifdef CONFIG_DEBUG_PAGEALLOC - printk("DEBUG_PAGEALLOC"); -#endif + if (debug_pagealloc_enabled()) + printk("DEBUG_PAGEALLOC"); printk("\n"); notify_die(DIE_OOPS, str, regs, 0, regs->int_code & 0xffff, SIGSEGV); print_modules(); diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index ef7d6c8..d27fccba 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -94,16 +94,15 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro) pgd_populate(&init_mm, pg_dir, pu_dir); } pu_dir = pud_offset(pg_dir, address); -#ifndef CONFIG_DEBUG_PAGEALLOC if (MACHINE_HAS_EDAT2 && pud_none(*pu_dir) && address && - !(address & ~PUD_MASK) && (address + PUD_SIZE <= end)) { + !(address & ~PUD_MASK) && (address + PUD_SIZE <= end) && + !debug_pagealloc_enabled()) { pud_val(*pu_dir) = __pa(address) | _REGION_ENTRY_TYPE_R3 | _REGION3_ENTRY_LARGE | (ro ? _REGION_ENTRY_PROTECT : 0); address += PUD_SIZE; continue; } -#endif if (pud_none(*pu_dir)) { pm_dir = vmem_pmd_alloc(); if (!pm_dir) @@ -111,9 +110,9 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro) pud_populate(&init_mm, pu_dir, pm_dir); } pm_dir = pmd_offset(pu_dir, address); -#ifndef CONFIG_DEBUG_PAGEALLOC if (MACHINE_HAS_EDAT1 && pmd_none(*pm_dir) && address && - !(address & ~PMD_MASK) && (address + PMD_SIZE <= end)) { + !(address & ~PMD_MASK) && (address + PMD_SIZE <= end) && + !debug_pagealloc_enabled()) { pmd_val(*pm_dir) = __pa(address) | _SEGMENT_ENTRY | _SEGMENT_ENTRY_LARGE | _SEGMENT_ENTRY_YOUNG | @@ -121,7 +120,6 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro) address += PMD_SIZE; continue; } -#endif if (pmd_none(*pm_dir)) { pt_dir = vmem_pte_alloc(address); if (!pt_dir) -- 2.3.0
WARNING: multiple messages have this Message-ID (diff)
From: Christian Borntraeger <borntraeger@de.ibm.com> To: akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, x86@kernel.org, linuxppc-dev@lists.ozlabs.org, davem@davemloft.net, Joonsoo Kim <iamjoonsoo.kim@lge.com>, davej@codemonkey.org.uk, Christian Borntraeger <borntraeger@de.ibm.com> Subject: [PATCH v3 3/3] s390: query dynamic DEBUG_PAGEALLOC setting Date: Wed, 27 Jan 2016 11:10:01 +0100 [thread overview] Message-ID: <1453889401-43496-4-git-send-email-borntraeger@de.ibm.com> (raw) In-Reply-To: <1453889401-43496-1-git-send-email-borntraeger@de.ibm.com> We can use debug_pagealloc_enabled() to check if we can map the identity mapping with 1MB/2GB pages as well as to print the current setting in dump_stack. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> --- arch/s390/kernel/dumpstack.c | 6 +++--- arch/s390/mm/vmem.c | 10 ++++------ 2 files changed, 7 insertions(+), 9 deletions(-) diff --git a/arch/s390/kernel/dumpstack.c b/arch/s390/kernel/dumpstack.c index dc8e204..e57eb22 100644 --- a/arch/s390/kernel/dumpstack.c +++ b/arch/s390/kernel/dumpstack.c @@ -11,6 +11,7 @@ #include <linux/export.h> #include <linux/kdebug.h> #include <linux/ptrace.h> +#include <linux/mm.h> #include <linux/module.h> #include <linux/sched.h> #include <asm/processor.h> @@ -185,9 +186,8 @@ void die(struct pt_regs *regs, const char *str) #ifdef CONFIG_SMP printk("SMP "); #endif -#ifdef CONFIG_DEBUG_PAGEALLOC - printk("DEBUG_PAGEALLOC"); -#endif + if (debug_pagealloc_enabled()) + printk("DEBUG_PAGEALLOC"); printk("\n"); notify_die(DIE_OOPS, str, regs, 0, regs->int_code & 0xffff, SIGSEGV); print_modules(); diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index ef7d6c8..d27fccba 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -94,16 +94,15 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro) pgd_populate(&init_mm, pg_dir, pu_dir); } pu_dir = pud_offset(pg_dir, address); -#ifndef CONFIG_DEBUG_PAGEALLOC if (MACHINE_HAS_EDAT2 && pud_none(*pu_dir) && address && - !(address & ~PUD_MASK) && (address + PUD_SIZE <= end)) { + !(address & ~PUD_MASK) && (address + PUD_SIZE <= end) && + !debug_pagealloc_enabled()) { pud_val(*pu_dir) = __pa(address) | _REGION_ENTRY_TYPE_R3 | _REGION3_ENTRY_LARGE | (ro ? _REGION_ENTRY_PROTECT : 0); address += PUD_SIZE; continue; } -#endif if (pud_none(*pu_dir)) { pm_dir = vmem_pmd_alloc(); if (!pm_dir) @@ -111,9 +110,9 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro) pud_populate(&init_mm, pu_dir, pm_dir); } pm_dir = pmd_offset(pu_dir, address); -#ifndef CONFIG_DEBUG_PAGEALLOC if (MACHINE_HAS_EDAT1 && pmd_none(*pm_dir) && address && - !(address & ~PMD_MASK) && (address + PMD_SIZE <= end)) { + !(address & ~PMD_MASK) && (address + PMD_SIZE <= end) && + !debug_pagealloc_enabled()) { pmd_val(*pm_dir) = __pa(address) | _SEGMENT_ENTRY | _SEGMENT_ENTRY_LARGE | _SEGMENT_ENTRY_YOUNG | @@ -121,7 +120,6 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro) address += PMD_SIZE; continue; } -#endif if (pmd_none(*pm_dir)) { pt_dir = vmem_pte_alloc(address); if (!pt_dir) -- 2.3.0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2016-01-27 10:09 UTC|newest] Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-01-27 10:09 [PATCH v3 0/3] Optimize CONFIG_DEBUG_PAGEALLOC Christian Borntraeger 2016-01-27 10:09 ` Christian Borntraeger 2016-01-27 10:09 ` [PATCH v3 1/3] mm: provide debug_pagealloc_enabled() without CONFIG_DEBUG_PAGEALLOC Christian Borntraeger 2016-01-27 10:09 ` Christian Borntraeger 2016-01-27 10:10 ` [PATCH v3 2/3] x86: query dynamic DEBUG_PAGEALLOC setting Christian Borntraeger 2016-01-27 10:10 ` Christian Borntraeger 2016-01-27 22:17 ` David Rientjes 2016-01-27 22:17 ` David Rientjes 2016-01-28 9:48 ` Christian Borntraeger 2016-01-28 9:48 ` Christian Borntraeger 2016-01-28 23:03 ` David Rientjes 2016-01-28 23:03 ` David Rientjes 2016-02-02 21:51 ` David Rientjes 2016-02-02 21:51 ` David Rientjes 2016-02-02 21:53 ` Christian Borntraeger 2016-02-02 21:53 ` Christian Borntraeger 2016-02-02 22:21 ` Andrew Morton 2016-02-02 22:21 ` Andrew Morton 2016-02-02 22:37 ` Christian Borntraeger 2016-02-02 22:37 ` Christian Borntraeger 2016-02-02 23:04 ` Andrew Morton 2016-02-02 23:04 ` Andrew Morton 2016-02-03 0:13 ` Stephen Rothwell 2016-02-03 0:13 ` Stephen Rothwell 2016-02-02 21:52 ` (unknown) David Rientjes via Linuxppc-dev 2016-01-28 23:04 ` (unknown) David Rientjes via Linuxppc-dev 2016-01-27 22:18 ` (unknown) David Rientjes via Linuxppc-dev 2016-01-27 10:10 ` Christian Borntraeger [this message] 2016-01-27 10:10 ` [PATCH v3 3/3] s390: query dynamic DEBUG_PAGEALLOC setting Christian Borntraeger 2016-01-27 22:18 ` David Rientjes 2016-01-27 22:18 ` David Rientjes 2016-01-27 22:22 ` (unknown) David Rientjes via Linuxppc-dev
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