Messages in this thread Patch in this message | | | From | Joonsoo Kim <> | Subject | [PATCH 1/2] slab: do ClearSlabPfmemalloc() for all pages of slab | Date | Sat, 25 Aug 2012 23:11:10 +0900 |
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Now, we just do ClearSlabPfmemalloc() for first page of slab when we clear SlabPfmemalloc flag. It is a problem because we sometimes test flag of page which is not first page of slab in __ac_put_obj().
So add code to do ClearSlabPfmemalloc for all pages of slab.
Signed-off-by: Joonsoo Kim <js1304@gmail.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Christoph Lameter <cl@linux-foundation.org> --- This patch based on Pekka's slab/next tree
diff --git a/mm/slab.c b/mm/slab.c index 3b4587b..45cf59a 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -992,8 +992,11 @@ static void *__ac_get_obj(struct kmem_cache *cachep, struct array_cache *ac, */ l3 = cachep->nodelists[numa_mem_id()]; if (!list_empty(&l3->slabs_free) && force_refill) { - struct slab *slabp = virt_to_slab(objp); - ClearPageSlabPfmemalloc(virt_to_page(slabp->s_mem)); + int i, nr_pages = (1 << cachep->gfporder); + struct page *page = virt_to_head_page(objp); + + for (i = 0; i < nr_pages; i++) + ClearPageSlabPfmemalloc(page + i); clear_obj_pfmemalloc(&objp); recheck_pfmemalloc_active(cachep, ac); return objp; -- 1.7.9.5
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