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update debug-vm-would-have-oomkilled

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This commit is contained in:
Kyle McMartin 2010-11-29 21:10:59 -05:00
parent 67f5884c55
commit 4d70d8dc24
2 changed files with 41 additions and 33 deletions
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5
kernel.spec
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@ -1176,7 +1176,7 @@ ApplyPatch acpi-update-battery-information-on-notification-0x81.patch
ApplyPatch linux-2.6-debug-sizeof-structs.patch
ApplyPatch linux-2.6-debug-nmi-timeout.patch
ApplyPatch linux-2.6-debug-taint-vm.patch
###FIX###ApplyPatch linux-2.6-debug-vm-would-have-oomkilled.patch
ApplyPatch linux-2.6-debug-vm-would-have-oomkilled.patch
ApplyPatch linux-2.6-debug-always-inline-kzalloc.patch
#
@ -1910,6 +1910,9 @@ fi
# || ||
%changelog
* Mon Nov 29 2010 Kyle McMartin <kyle@redhat.com>
- Update debug-vm-would_have_oomkilled patch.
* Mon Nov 29 2010 Kyle McMartin <kyle@redhat.com> 2.6.37-0.rc3.git6.1
- Linux 2.6.37-rc3-git6
- TTY: open/hangup race fixup (rhbz#630464)

69
linux-2.6-debug-vm-would-have-oomkilled.patch
View File

@ -1,26 +1,30 @@
From 03657519851cd180983db4bd0c38eaeed4aa2962 Mon Sep 17 00:00:00 2001
From: Kyle McMartin <kyle@treachery.i.jkkm.org>
Date: Mon, 11 Jan 2010 08:25:12 -0500
Subject: linux-2.6-debug-vm-would-have-oomkilled.patch
From beb764ac03e52eba1a654afb4273fab1f9de3cff Mon Sep 17 00:00:00 2001
From: Kyle McMartin <kyle@mcmartin.ca>
Date: Mon, 29 Nov 2010 20:59:14 -0500
Subject: [PATCH] linux-2.6-debug-vm-would_have_oomkilled
---
kernel/sysctl.c | 8 ++++++++
mm/oom_kill.c | 7 +++++++
2 files changed, 15 insertions(+), 0 deletions(-)
include/linux/oom.h | 1 +
kernel/sysctl.c | 7 +++++++
mm/oom_kill.c | 8 ++++++++
3 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/include/linux/oom.h b/include/linux/oom.h
index 5e3aa83..79a27b4 100644
--- a/include/linux/oom.h
+++ b/include/linux/oom.h
@@ -72,5 +72,6 @@ extern struct task_struct *find_lock_task_mm(struct task_struct *p);
extern int sysctl_oom_dump_tasks;
extern int sysctl_oom_kill_allocating_task;
extern int sysctl_panic_on_oom;
+extern int sysctl_would_have_oomkilled;
#endif /* __KERNEL__*/
#endif /* _INCLUDE_LINUX_OOM_H */
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 8a68b24..72a4ff1 100644
index 5abfa15..a0fed6d 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -71,6 +71,7 @@ extern int sysctl_overcommit_ratio;
extern int sysctl_panic_on_oom;
extern int sysctl_oom_kill_allocating_task;
extern int sysctl_oom_dump_tasks;
+extern int sysctl_would_have_oomkilled;
extern int max_threads;
extern int core_uses_pid;
extern int suid_dumpable;
@@ -973,6 +974,13 @@ static struct ctl_table vm_table[] = {
@@ -1000,6 +1000,13 @@ static struct ctl_table vm_table[] = {
.proc_handler = proc_dointvec,
},
{
@ -28,37 +32,38 @@ index 8a68b24..72a4ff1 100644
+ .data = &sysctl_would_have_oomkilled,
+ .maxlen = sizeof(sysctl_would_have_oomkilled),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ .proc_handler = proc_dointvec,
+ },
+ {
.procname = "overcommit_ratio",
.data = &sysctl_overcommit_ratio,
.maxlen = sizeof(sysctl_overcommit_ratio),
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index f52481b..a892f07 100644
index 7dcca55..281ac39 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -31,6 +31,7 @@
@@ -35,6 +35,7 @@
int sysctl_panic_on_oom;
int sysctl_oom_kill_allocating_task;
int sysctl_oom_dump_tasks;
int sysctl_oom_dump_tasks = 1;
+int sysctl_would_have_oomkilled;
static DEFINE_SPINLOCK(zone_scan_lock);
/* #define DEBUG */
@@ -396,6 +397,12 @@ static void __oom_kill_task(struct task_struct *p, int verbose)
return;
#ifdef CONFIG_NUMA
@@ -477,6 +478,13 @@ static int oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
}
+ if (sysctl_would_have_oomkilled == 1) {
+ printk(KERN_ERR "Would have killed process %d (%s). But continuing instead.\n",
+ task_pid_nr(p), p->comm);
+ return;
task_lock(p);
+ if (sysctl_would_have_oomkilled) {
+ printk(KERN_ERR "%s: would have killed process %d (%s), but continuing instead...\n",
+ __func__, task_pid_nr(p), p->comm);
+ task_unlock(p);
+ return 0;
+ }
+
if (verbose)
printk(KERN_ERR "Killed process %d (%s) "
"vsz:%lukB, anon-rss:%lukB, file-rss:%lukB\n",
pr_err("%s: Kill process %d (%s) score %d or sacrifice child\n",
message, task_pid_nr(p), p->comm, points);
task_unlock(p);
--
1.6.5.2
1.7.3.2