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authorJoonsoo Kim <iamjoonsoo.kim@lge.com>2013-10-24 10:07:37 +0900
committerPekka Enberg <penberg@iki.fi>2013-10-24 20:17:19 +0300
commit73293c2f900d0adbb6a415b312cd57976d5ae242 (patch)
treeff87b3e043fc9774431469a5b5d917bf6c28f570 /Documentation/stable_kernel_rules.txt
parent6e4664525b1db28f8c4e1130957f70a94c19213e (diff)
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slab: correct pfmemalloc check
We checked pfmemalloc by slab unit, not page unit. You can see this in is_slab_pfmemalloc(). So other pages don't need to be set/cleared pfmemalloc. And, therefore we should check pfmemalloc in page flag of first page, but current implementation don't do that. virt_to_head_page(obj) just return 'struct page' of that object, not one of first page, since the SLAB don't use __GFP_COMP when CONFIG_MMU. To get 'struct page' of first page, we first get a slab and try to get it via virt_to_head_page(slab->s_mem). Acked-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Pekka Enberg <penberg@iki.fi>
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