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Commit 0d673a5a authored by Nick Piggin's avatar Nick Piggin Committed by Linus Torvalds
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[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: default avatarNick Piggin <npiggin@suse.de>
Acked-by: default avatarPaul Jackson <pj@sgi.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 36920e06

kernel/cpuset.c

+1 −1
Original line number Original line 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)

int cpuset_excl_nodes_overlap(const struct task_struct *p)

{

{

	const struct cpuset *cs1, *cs2;	/* my and p's cpuset ancestors */

	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);

	task_lock(current);

	if (current->flags & PF_EXITING) {

	if (current->flags & PF_EXITING) {