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authorDavid Rientjes <rientjes@google.com>2011-10-31 17:07:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-10-31 17:30:45 -0700
commitf660daac474c6f7c2d710100e29b3276a6f4db0a (patch)
treead142e254a7b804cb158f2c64e9e6a77e8e4388c /mm/oom_kill.c
parentd08c429b06d21bd2add88aea2cd1996f1b9b3bda (diff)
downloadlinux-f660daac474c6f7c2d710100e29b3276a6f4db0a.tar.gz
oom: thaw threads if oom killed thread is frozen before deferring
If a thread has been oom killed and is frozen, thaw it before returning to the page allocator. Otherwise, it can stay frozen indefinitely and no memory will be freed. Signed-off-by: David Rientjes <rientjes@google.com> Reported-by: Konstantin Khlebnikov <khlebnikov@openvz.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Acked-by: Michal Hocko <mhocko@suse.cz> 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.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 626303b52f3..d897262068e 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -32,6 +32,7 @@
#include <linux/mempolicy.h>
#include <linux/security.h>
#include <linux/ptrace.h>
+#include <linux/freezer.h>
int sysctl_panic_on_oom;
int sysctl_oom_kill_allocating_task;
@@ -317,8 +318,11 @@ static struct task_struct *select_bad_process(unsigned int *ppoints,
* blocked waiting for another task which itself is waiting
* for memory. Is there a better alternative?
*/
- if (test_tsk_thread_flag(p, TIF_MEMDIE))
+ if (test_tsk_thread_flag(p, TIF_MEMDIE)) {
+ if (unlikely(frozen(p)))
+ thaw_process(p);
return ERR_PTR(-1UL);
+ }
if (!p->mm)
continue;