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 <[email protected]>
___
Fixes a CONFIG_NUMA regression introduced in 2.6.20-rc1. Or you may
feel it's cleaner for cache_grow to skip its kmem_freepages when objp
is input: patch below is slightly simpler, but I've no strong feeling.
mm/slab.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- 2.6.20-rc3/mm/slab.c 2007-01-01 10:30:46.000000000 +0000
+++ linux/mm/slab.c 2007-01-04 17:30:11.000000000 +0000
@@ -3281,7 +3281,7 @@ retry:
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 @@ retry:
*/
goto retry;
} else {
- kmem_freepages(cache, obj);
+ /* cache_grow already freed obj */
obj = NULL;
}
}
-
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