diff options
| author | David Rientjes <rientjes@google.com> | 2007-10-16 23:25:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:42:46 -0700 |
| commit | fe071d7e8aae5745c009c808bb8933f22a9e305a (patch) | |
| tree | 757dc7c41a7b56974c383743103fb711c976c288 /mm/oom_kill.c | |
| parent | ff0ceb9deb6eb017f52900b708d49cfa77bf25fb (diff) | |
| download | lwn-fe071d7e8aae5745c009c808bb8933f22a9e305a.tar.gz lwn-fe071d7e8aae5745c009c808bb8933f22a9e305a.zip | |
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 'mm/oom_kill.c')
| -rw-r--r-- | mm/oom_kill.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 6e999c88c503..00d0bd7d6a2b 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -27,6 +27,7 @@ #include <linux/notifier.h> int sysctl_panic_on_oom; +int sysctl_oom_kill_allocating_task; static DEFINE_MUTEX(zone_scan_mutex); /* #define DEBUG */ @@ -471,14 +472,16 @@ void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order) "No available memory (MPOL_BIND)"); break; - case CONSTRAINT_CPUSET: - oom_kill_process(current, points, - "No available memory in cpuset"); - break; - case CONSTRAINT_NONE: if (sysctl_panic_on_oom) panic("out of memory. panic_on_oom is selected\n"); + /* Fall-through */ + case CONSTRAINT_CPUSET: + if (sysctl_oom_kill_allocating_task) { + oom_kill_process(current, points, + "Out of memory (oom_kill_allocating_task)"); + break; + } retry: /* * Rambo mode: Shoot down a process and hope it solves whatever |