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| author | Christoph Lameter <cl@linux.com> | 2012-05-09 10:09:52 -0500 |
|---|---|---|
| committer | Pekka Enberg <penberg@kernel.org> | 2012-06-01 09:25:40 +0300 |
| commit | 507effeaba29bf724dfe38317fbd11d0fe25fa40 (patch) | |
| tree | 9e877eb0285c9fab8f7248d4157b799a7c980b4b /mm/slub.c | |
| parent | 6faa68337b0c90923a1405ae9c196cee64921b7e (diff) | |
| download | lwn-507effeaba29bf724dfe38317fbd11d0fe25fa40.tar.gz lwn-507effeaba29bf724dfe38317fbd11d0fe25fa40.zip | |
slub: Add frozen check in __slab_alloc
Verify that objects returned from __slab_alloc come from slab pages
in the correct state.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'mm/slub.c')
| -rw-r--r-- | mm/slub.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/slub.c b/mm/slub.c index 83f258298de7..a3395c28f561 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -2245,6 +2245,12 @@ redo: stat(s, ALLOC_REFILL); load_freelist: + /* + * freelist is pointing to the list of objects to be used. + * page is pointing to the page from which the objects are obtained. + * That page must be frozen for per cpu allocations to work. + */ + VM_BUG_ON(!c->page->frozen); c->freelist = get_freepointer(s, freelist); c->tid = next_tid(c->tid); local_irq_restore(flags); |