slub: Take node lock during object free checks

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Only applies to scenarios where debugging is on:

Validation of slabs can currently occur while debugging
information is updated from the fast paths of the allocator.
This results in various races where we get false reports about
slab metadata not being in order.

This patch makes the fast paths take the node lock so that
serialization with slab validation will occur. Causes additional
slowdown in debug scenarios.

Reported-by: Waiman Long <Waiman.Long@hp.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

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Christoph Lameter 2012-05-30 12:54:46 -05:00 • committed by Pekka Enberg

parent 455ce9eb1c

commit 19c7ff9ecd

1 changed files with 18 additions and 12 deletions

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mm/slub.c

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