slub,rcu: don't assume the size of struct rcu_head

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The size of struct rcu_head may be changed. When it becomes larger,
it will pollute the page array.

We reserve some some bytes for struct rcu_head when a slab
is allocated in this situation.

Changed from V1:
	use VM_BUG_ON instead BUG_ON

Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

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Lai Jiangshan 2011-03-10 15:22:00 +08:00 • committed by Pekka Enberg

parent ab9a0f196f

commit da9a638c6f

1 changed files with 25 additions and 5 deletions

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mm/slub.c

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