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Date: Wed, 23 Aug 2006 20:40:19 +0900
From: Akinobu Mita <mita@...aclelinux.com>
To: linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [RFC PATCH] prevent from killing OOM disabled task in do_page_fault()
The process protected from oom-killer may be killed when do_page_fault()
runs out of memory. This patch skips those processes as well as init task.
I couldn't touch several architectures (arm cris frv parisc sparc sparc64).
Because there is no survival path in that case for now.
Signed-off-by: Akinobu Mita <mita@...aclelinux.com>
arch/alpha/mm/fault.c | 2 +-
arch/arm26/mm/fault.c | 2 +-
arch/i386/mm/fault.c | 2 +-
arch/ia64/mm/fault.c | 2 +-
arch/m32r/mm/fault.c | 2 +-
arch/m68k/mm/fault.c | 2 +-
arch/mips/mm/fault.c | 2 +-
arch/powerpc/mm/fault.c | 2 +-
arch/ppc/mm/fault.c | 2 +-
arch/s390/mm/fault.c | 2 +-
arch/sh/mm/fault.c | 2 +-
arch/sh64/mm/fault.c | 2 +-
arch/x86_64/mm/fault.c | 2 +-
arch/xtensa/mm/fault.c | 2 +-
14 files changed, 14 insertions(+), 14 deletions(-)
Index: work-failmalloc/arch/alpha/mm/fault.c
===================================================================
--- work-failmalloc.orig/arch/alpha/mm/fault.c
+++ work-failmalloc/arch/alpha/mm/fault.c
@@ -193,7 +193,7 @@ do_page_fault(unsigned long address, uns
/* We ran out of memory, or some other thing happened to us that
made us unable to handle the page fault gracefully. */
out_of_memory:
- if (current->pid == 1) {
+ if (current->pid == 1 || current->oomkilladj == OOM_DISABLE) {
yield();
down_read(&mm->mmap_sem);
goto survive;
Index: work-failmalloc/arch/arm26/mm/fault.c
===================================================================
--- work-failmalloc.orig/arch/arm26/mm/fault.c
+++ work-failmalloc/arch/arm26/mm/fault.c
@@ -185,7 +185,7 @@ survive:
}
fault = -3; /* out of memory */
- if (tsk->pid != 1)
+ if (tsk->pid != 1 && tsk->oomkilladj != OOM_DISABLE)
goto out;
/*
Index: work-failmalloc/arch/i386/mm/fault.c
===================================================================
--- work-failmalloc.orig/arch/i386/mm/fault.c
+++ work-failmalloc/arch/i386/mm/fault.c
@@ -598,7 +598,7 @@ no_context:
*/
out_of_memory:
up_read(&mm->mmap_sem);
- if (tsk->pid == 1) {
+ if (tsk->pid == 1 || tsk->oomkilladj == OOM_DISABLE) {
yield();
down_read(&mm->mmap_sem);
goto survive;
Index: work-failmalloc/arch/ia64/mm/fault.c
===================================================================
--- work-failmalloc.orig/arch/ia64/mm/fault.c
+++ work-failmalloc/arch/ia64/mm/fault.c
@@ -278,7 +278,7 @@ ia64_do_page_fault (unsigned long addres
out_of_memory:
up_read(&mm->mmap_sem);
- if (current->pid == 1) {
+ if (current->pid == 1 || current->oomkilladj == OOM_DISABLE) {
yield();
down_read(&mm->mmap_sem);
goto survive;
Index: work-failmalloc/arch/m32r/mm/fault.c
===================================================================
--- work-failmalloc.orig/arch/m32r/mm/fault.c
+++ work-failmalloc/arch/m32r/mm/fault.c
@@ -299,7 +299,7 @@ no_context:
*/
out_of_memory:
up_read(&mm->mmap_sem);
- if (tsk->pid == 1) {
+ if (tsk->pid == 1 || tsk->oomkilladj == OOM_DISABLE) {
yield();
down_read(&mm->mmap_sem);
goto survive;
Index: work-failmalloc/arch/m68k/mm/fault.c
===================================================================
--- work-failmalloc.orig/arch/m68k/mm/fault.c
+++ work-failmalloc/arch/m68k/mm/fault.c
@@ -181,7 +181,7 @@ good_area:
*/
out_of_memory:
up_read(&mm->mmap_sem);
- if (current->pid == 1) {
+ if (current->pid == 1 || current->oomkilladj == OOM_DISABLE) {
yield();
down_read(&mm->mmap_sem);
goto survive;
Index: work-failmalloc/arch/mips/mm/fault.c
===================================================================
--- work-failmalloc.orig/arch/mips/mm/fault.c
+++ work-failmalloc/arch/mips/mm/fault.c
@@ -171,7 +171,7 @@ no_context:
*/
out_of_memory:
up_read(&mm->mmap_sem);
- if (tsk->pid == 1) {
+ if (tsk->pid == 1 || tsk->oomkilladj == OOM_DISABLE) {
yield();
down_read(&mm->mmap_sem);
goto survive;
Index: work-failmalloc/arch/powerpc/mm/fault.c
===================================================================
--- work-failmalloc.orig/arch/powerpc/mm/fault.c
+++ work-failmalloc/arch/powerpc/mm/fault.c
@@ -386,7 +386,7 @@ bad_area_nosemaphore:
*/
out_of_memory:
up_read(&mm->mmap_sem);
- if (current->pid == 1) {
+ if (current->pid == 1 || current->oomkilladj == OOM_DISABLE) {
yield();
down_read(&mm->mmap_sem);
goto survive;
Index: work-failmalloc/arch/ppc/mm/fault.c
===================================================================
--- work-failmalloc.orig/arch/ppc/mm/fault.c
+++ work-failmalloc/arch/ppc/mm/fault.c
@@ -291,7 +291,7 @@ bad_area:
*/
out_of_memory:
up_read(&mm->mmap_sem);
- if (current->pid == 1) {
+ if (current->pid == 1 || current->oomkilladj == OOM_DISABLE) {
yield();
down_read(&mm->mmap_sem);
goto survive;
Index: work-failmalloc/arch/s390/mm/fault.c
===================================================================
--- work-failmalloc.orig/arch/s390/mm/fault.c
+++ work-failmalloc/arch/s390/mm/fault.c
@@ -315,7 +315,7 @@ no_context:
*/
out_of_memory:
up_read(&mm->mmap_sem);
- if (tsk->pid == 1) {
+ if (tsk->pid == 1 || tsk->oomkilladj == OOM_DISABLE) {
yield();
goto survive;
}
Index: work-failmalloc/arch/sh/mm/fault.c
===================================================================
--- work-failmalloc.orig/arch/sh/mm/fault.c
+++ work-failmalloc/arch/sh/mm/fault.c
@@ -160,7 +160,7 @@ no_context:
*/
out_of_memory:
up_read(&mm->mmap_sem);
- if (current->pid == 1) {
+ if (current->pid == 1 || current->oomkilladj == OOM_DISABLE) {
yield();
down_read(&mm->mmap_sem);
goto survive;
Index: work-failmalloc/arch/sh64/mm/fault.c
===================================================================
--- work-failmalloc.orig/arch/sh64/mm/fault.c
+++ work-failmalloc/arch/sh64/mm/fault.c
@@ -326,7 +326,7 @@ out_of_memory:
}
printk("fault:Out of memory\n");
up_read(&mm->mmap_sem);
- if (current->pid == 1) {
+ if (current->pid == 1 || current->oomkilladj == OOM_DISABLE) {
yield();
down_read(&mm->mmap_sem);
goto survive;
Index: work-failmalloc/arch/x86_64/mm/fault.c
===================================================================
--- work-failmalloc.orig/arch/x86_64/mm/fault.c
+++ work-failmalloc/arch/x86_64/mm/fault.c
@@ -586,7 +586,7 @@ no_context:
*/
out_of_memory:
up_read(&mm->mmap_sem);
- if (current->pid == 1) {
+ if (current->pid == 1 || current->oomkilladj == OOM_DISABLE) {
yield();
goto again;
}
Index: work-failmalloc/arch/xtensa/mm/fault.c
===================================================================
--- work-failmalloc.orig/arch/xtensa/mm/fault.c
+++ work-failmalloc/arch/xtensa/mm/fault.c
@@ -144,7 +144,7 @@ bad_area:
*/
out_of_memory:
up_read(&mm->mmap_sem);
- if (current->pid == 1) {
+ if (current->pid == 1 || current->oomkilladj == OOM_DISABLE) {
yield();
down_read(&mm->mmap_sem);
goto survive;
-
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