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| author | David Rientjes <rientjes@google.com> | 2011-10-31 17:07:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-31 17:30:45 -0700 |
| commit | f660daac474c6f7c2d710100e29b3276a6f4db0a (patch) | |
| tree | ad142e254a7b804cb158f2c64e9e6a77e8e4388c /mm/oom_kill.c | |
| parent | d08c429b06d21bd2add88aea2cd1996f1b9b3bda (diff) | |
| download | linux-f660daac474c6f7c2d710100e29b3276a6f4db0a.tar.gz linux-f660daac474c6f7c2d710100e29b3276a6f4db0a.tar.bz2 linux-f660daac474c6f7c2d710100e29b3276a6f4db0a.zip | |
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.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 626303b52f3c..d897262068e2 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; |