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[PATCH] oom: don't kill unkillable children or siblings

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Abort the kill if any of our threads have OOM_DISABLE set.  Having this
test here also prevents any OOM_DISABLE child of the "selected" process
from being killed.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Nick Piggin 2006-12-06 20:31:50 -08:00 committed by Linus Torvalds
parent 7253f4ef04
commit c33e0fca35
1 changed files with 11 additions and 2 deletions
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13
mm/oom_kill.c
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@ -313,15 +313,24 @@ static int oom_kill_task(struct task_struct *p, const char *message)
if (mm == NULL)
return 1;
/*
* Don't kill the process if any threads are set to OOM_DISABLE
*/
do_each_thread(g, q) {
if (q->mm == mm && p->oomkilladj == OOM_DISABLE)
return 1;
} while_each_thread(g, q);
__oom_kill_task(p, message);
/*
* kill all processes that share the ->mm (i.e. all threads),
* but are in a different thread group
*/
do_each_thread(g, q)
do_each_thread(g, q) {
if (q->mm == mm && q->tgid != p->tgid)
__oom_kill_task(q, message);
while_each_thread(g, q);
} while_each_thread(g, q);
return 0;
}