From: Christian Borntraeger <borntraeger@de.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: akpm@linux-foundation.org, linux-mm@kvack.org,
linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
x86@kernel.org, Christian Borntraeger <borntraeger@de.ibm.com>
Subject: [PATCH/RFC 3/3] s390: query dynamic DEBUG_PAGEALLOC setting
Date: Tue, 26 Jan 2016 10:18:25 +0100 [thread overview]
Message-ID: <1453799905-10941-4-git-send-email-borntraeger@de.ibm.com> (raw)
In-Reply-To: <1453799905-10941-1-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>
---
arch/s390/kernel/dumpstack.c | 4 +++-
arch/s390/mm/vmem.c | 10 ++++------
2 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/arch/s390/kernel/dumpstack.c b/arch/s390/kernel/dumpstack.c
index dc8e204..a1c0530 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>
@@ -186,7 +187,8 @@ void die(struct pt_regs *regs, const char *str)
printk("SMP ");
#endif
#ifdef CONFIG_DEBUG_PAGEALLOC
- printk("DEBUG_PAGEALLOC");
+ printk("DEBUG_PAGEALLOC(%s)",
+ debug_pagealloc_enabled() ? "enabled" : "disabled");
#endif
printk("\n");
notify_die(DIE_OOPS, str, regs, 0, regs->int_code & 0xffff, SIGSEGV);
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
--
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WARNING: multiple messages have this Message-ID (diff)
From: Christian Borntraeger <borntraeger@de.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: akpm@linux-foundation.org, linux-mm@kvack.org,
linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
x86@kernel.org, Christian Borntraeger <borntraeger@de.ibm.com>
Subject: [PATCH/RFC 3/3] s390: query dynamic DEBUG_PAGEALLOC setting
Date: Tue, 26 Jan 2016 10:18:25 +0100 [thread overview]
Message-ID: <1453799905-10941-4-git-send-email-borntraeger@de.ibm.com> (raw)
Message-ID: <20160126091825.c1cjBJktGgU7QWoOpINuFVDjMOulrF2kfaQnKQCnDJk@z> (raw)
In-Reply-To: <1453799905-10941-1-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>
---
arch/s390/kernel/dumpstack.c | 4 +++-
arch/s390/mm/vmem.c | 10 ++++------
2 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/arch/s390/kernel/dumpstack.c b/arch/s390/kernel/dumpstack.c
index dc8e204..a1c0530 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>
@@ -186,7 +187,8 @@ void die(struct pt_regs *regs, const char *str)
printk("SMP ");
#endif
#ifdef CONFIG_DEBUG_PAGEALLOC
- printk("DEBUG_PAGEALLOC");
+ printk("DEBUG_PAGEALLOC(%s)",
+ debug_pagealloc_enabled() ? "enabled" : "disabled");
#endif
printk("\n");
notify_die(DIE_OOPS, str, regs, 0, regs->int_code & 0xffff, SIGSEGV);
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
next prev parent reply other threads:[~2016-01-26 9:18 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-26 9:18 [PATCH/RFC 0/3] Optimize CONFIG_DEBUG_PAGEALLOC Christian Borntraeger
2016-01-26 9:18 ` Christian Borntraeger
2016-01-26 9:18 ` [PATCH/RFC 1/3] mm: provide debug_pagealloc_enabled() without CONFIG_DEBUG_PAGEALLOC Christian Borntraeger
2016-01-26 9:18 ` Christian Borntraeger
2016-01-26 23:23 ` David Rientjes
2016-01-26 9:18 ` [PATCH/RFC 2/3] x86: query dynamic DEBUG_PAGEALLOC setting Christian Borntraeger
2016-01-26 9:18 ` Christian Borntraeger
2016-01-26 9:18 ` Christian Borntraeger [this message]
2016-01-26 9:18 ` [PATCH/RFC 3/3] s390: " Christian Borntraeger
2016-01-26 18:19 ` Heiko Carstens
2016-01-26 18:19 ` Heiko Carstens
2016-01-26 20:38 ` Thomas Gleixner
2016-01-26 20:38 ` Thomas Gleixner
2016-01-26 23:29 ` David Rientjes
2016-01-26 23:29 ` David Rientjes
2016-01-27 0:19 ` Joonsoo Kim
2016-01-27 0:36 ` David Rientjes
2016-01-27 0:36 ` David Rientjes
2016-01-27 0:59 ` Joonsoo Kim
2016-01-27 7:59 ` Christian Borntraeger
2016-01-27 7:59 ` Christian Borntraeger
2016-01-27 12:41 ` Vlastimil Babka
2016-01-27 12:47 ` Christian Borntraeger
2016-01-27 12:47 ` Christian Borntraeger
2016-01-27 13:03 ` Vlastimil Babka
2016-01-27 13:09 ` Christian Borntraeger
2016-01-28 4:25 ` Joonsoo Kim
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