[PATCH] oom: handle oom_disable exiting
Having the oomkilladj == OOM_DISABLE check before the releasing check means
that oomkilladj == OOM_DISABLE tasks exiting will not stop the OOM killer.
Moving the test down will give the desired behaviour. Also: it will allow
them to "OOM-kill" themselves if they are exiting. As per the previous patch,
this is required to prevent OOM killer deadlocks (and they don't actually get
killed, because they're already exiting -- they're simply allowed access to
memory reserves).
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 0131bae..55a05f1 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -204,8 +204,6 @@
/* skip the init task with pid == 1 */
if (p->pid == 1)
continue;
- if (p->oomkilladj == OOM_DISABLE)
- continue;
/*
* This is in the process of releasing memory so wait for it
@@ -230,6 +228,8 @@
}
return ERR_PTR(-1UL);
}
+ if (p->oomkilladj == OOM_DISABLE)
+ continue;
if (p->flags & PF_SWAPOFF)
return p;