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[PATCH] fix BUG_ON(!PageSlab) from fallback_alloc

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pdflush hit the BUG_ON(!PageSlab(page)) in kmem_freepages called from
fallback_alloc: cache_grow already freed those pages when alloc_slabmgmt
failed.  But it wouldn't have freed them if __GFP_NO_GROW, so make sure
fallback_alloc doesn't waste its time on that case.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Acked-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Pekka J Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hugh Dickins 2007-01-05 16:36:36 -08:00 committed by Linus Torvalds
parent be6aab0e9f
commit b6a6045181
1 changed files with 2 additions and 2 deletions
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4
mm/slab.c
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@ -3281,7 +3281,7 @@ void *fallback_alloc(struct kmem_cache *cache, gfp_t flags)
flags | GFP_THISNODE, nid);
}
if (!obj) {
if (!obj && !(flags & __GFP_NO_GROW)) {
/*
* This allocation will be performed within the constraints
* of the current cpuset / memory policy requirements.
@ -3310,7 +3310,7 @@ void *fallback_alloc(struct kmem_cache *cache, gfp_t flags)
*/
goto retry;
} else {
kmem_freepages(cache, obj);
/* cache_grow already freed obj */
obj = NULL;
}
}