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authorDavid Rientjes <rientjes@google.com>2007-10-16 23:25:56 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 08:42:46 -0700
commitfe071d7e8aae5745c009c808bb8933f22a9e305a (patch)
tree757dc7c41a7b56974c383743103fb711c976c288 /kernel/sysctl.c
parentff0ceb9deb6eb017f52900b708d49cfa77bf25fb (diff)
oom: add oom_kill_allocating_task sysctl
Adds a new sysctl, 'oom_kill_allocating_task', which will automatically kill the OOM-triggering task instead of scanning through the tasklist to find a memory-hogging target. This is helpful for systems with an insanely large number of tasks where scanning the tasklist significantly degrades performance. Cc: Andrea Arcangeli <andrea@suse.de> Acked-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/sysctl.c')
-rw-r--r--kernel/sysctl.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index c676b5ec88f5..5e63de0f9ee2 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -63,6 +63,7 @@ extern int print_fatal_signals;
extern int sysctl_overcommit_memory;
extern int sysctl_overcommit_ratio;
extern int sysctl_panic_on_oom;
+extern int sysctl_oom_kill_allocating_task;
extern int max_threads;
extern int core_uses_pid;
extern int suid_dumpable;
@@ -781,6 +782,14 @@ static ctl_table vm_table[] = {
.proc_handler = &proc_dointvec,
},
{
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "oom_kill_allocating_task",
+ .data = &sysctl_oom_kill_allocating_task,
+ .maxlen = sizeof(sysctl_oom_kill_allocating_task),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
.ctl_name = VM_OVERCOMMIT_RATIO,
.procname = "overcommit_ratio",
.data = &sysctl_overcommit_ratio,