slub: automatically reserve bytes at the end of slab

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There is no "struct" for slub's slab, it shares with struct page.
But struct page is very small, it is insufficient when we need
to add some metadata for slab.

So we add a field "reserved" to struct kmem_cache, when a slab
is allocated, kmem_cache->reserved bytes are automatically reserved
at the end of the slab for slab's metadata.

Changed from v1:
	Export the reserved field via sysfs

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 15:21:48 +08:00 • committed by Pekka Enberg

parent a5abba989d

commit ab9a0f196f

2 changed files with 31 additions and 17 deletions

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1

include/linux/slub_def.h

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47

mm/slub.c

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