Commit 693f7d36 authored by Jacob Shin's avatar Jacob Shin Committed by Linus Torvalds
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[PATCH] slab: fix crash on __drain_alien_cahce() during CPU Hotplug 



transfer_objects should only be called when all of the cpus in the
node are online.  CPU_DEAD notifier callback marks l3->shared to NULL.

Signed-off-by: default avatarJacob Shin <jacob.shin@amd.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 4de0b1ee

mm/slab.c

+2 −1
Original line number Diff line number Diff line
@@ -979,6 +979,7 @@ static void __drain_alien_cache(struct kmem_cache *cachep, 
		 * That way we could avoid the overhead of putting the objects

		 * into the free lists and getting them back later.

		 */

		if (rl3->shared)

			transfer_objects(rl3->shared, ac, ac->limit);



		free_block(cachep, ac->entry, ac->avail, node);