sched/numa: Cure update_numa_stats() vs. hotplug

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Because we're completely unserialized against hotplug its well
possible to try and generate numa stats for an offlined node.

Bail out early (and avoid a /0) in this case. The resulting stats are
all 0 which should result in an undesirable balance target -- not to
mention that actually trying to migrate to an offline CPU will fail.

Reported-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Mel Gorman <mgorman@suse.de>
Link: http://lkml.kernel.org/n/tip-orja0qylcvyhxfsuebcyL5sI@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Peter Zijlstra 2013-11-06 18:47:57 +01:00 • committed by Ingo Molnar

parent 46a73e8a1c

commit 5eca82a9ac

1 changed files with 14 additions and 1 deletions

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kernel/sched/fair.c

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