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authorDavid Rientjes <rientjes@google.com>2012-03-21 19:34:04 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-21 20:54:58 -0400
commit08ab9b10d43aca091fdff58b69fc1ec89c5b8a83 (patch)
tree73abfd3a257f3feadc0fa28c3117aaa9d95af596 /mm/page_alloc.c
parentb76437579d1344b612cf1851ae610c636cec7db0 (diff)
mm, oom: force oom kill on sysrq+f
The oom killer chooses not to kill a thread if: - an eligible thread has already been oom killed and has yet to exit, and - an eligible thread is exiting but has yet to free all its memory and is not the thread attempting to currently allocate memory. SysRq+F manually invokes the global oom killer to kill a memory-hogging task. This is normally done as a last resort to free memory when no progress is being made or to test the oom killer itself. For both uses, we always want to kill a thread and never defer. This patch causes SysRq+F to always kill an eligible thread and can be used to force a kill even if another oom killed thread has failed to exit. Signed-off-by: David Rientjes <rientjes@google.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Pekka Enberg <penberg@kernel.org> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 572b93ea475c..98552cf1da8b 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1968,7 +1968,7 @@ __alloc_pages_may_oom(gfp_t gfp_mask, unsigned int order,
1968 goto out; 1968 goto out;
1969 } 1969 }
1970 /* Exhausted what can be done so it's blamo time */ 1970 /* Exhausted what can be done so it's blamo time */
1971 out_of_memory(zonelist, gfp_mask, order, nodemask); 1971 out_of_memory(zonelist, gfp_mask, order, nodemask, false);
1972 1972
1973out: 1973out:
1974 clear_zonelist_oom(zonelist, gfp_mask); 1974 clear_zonelist_oom(zonelist, gfp_mask);