Commit 0d673a5a authored Aug 27, 2006 by Nick Piggin Committed by Linus Torvalds Aug 27, 2006

[PATCH] cpuset: oom panic fix



cpuset_excl_nodes_overlap always returns 0 if current is exiting.  This caused
customer's systems to panic in the OOM killer when processes were having
trouble getting memory for the final put_user in mm_release.  Even though
there were lots of processes to kill.

Change to returning 1 in this case.  This achieves parity with !CONFIG_CPUSETS
case, and was observed to fix the problem.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 36920e06

kernel/cpuset.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2420,7 +2420,7 @@ EXPORT_SYMBOL_GPL(cpuset_mem_spread_node);
		int cpuset_excl_nodes_overlap(const struct task_struct *p)
		{
		const struct cpuset cs1, cs2; /* my and p's cpuset ancestors */
		int overlap = 0; /* do cpusets overlap? */
		int overlap = 1; /* do cpusets overlap? */

		task_lock(current);
		if (current->flags & PF_EXITING) {

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