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Date: Fri, 26 Feb 2016 15:01:12 +0900 From: js1304@...il.com To: Andrew Morton <akpm@...ux-foundation.org> Cc: Christoph Lameter <cl@...ux.com>, Pekka Enberg <penberg@...nel.org>, David Rientjes <rientjes@...gle.com>, Jesper Dangaard Brouer <brouer@...hat.com>, Vlastimil Babka <vbabka@...e.cz>, linux-mm@...ck.org, linux-kernel@...r.kernel.org, Joonsoo Kim <iamjoonsoo.kim@....com> Subject: [PATCH v2 05/17] mm/slab: use more appropriate condition check for debug_pagealloc From: Joonsoo Kim <iamjoonsoo.kim@....com> debug_pagealloc debugging is related to SLAB_POISON flag rather than FORCED_DEBUG option, although FORCED_DEBUG option will enable SLAB_POISON. Fix it. Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com> Cc: Christoph Lameter <cl@...ux.com> Cc: Pekka Enberg <penberg@...nel.org> Cc: David Rientjes <rientjes@...gle.com> Cc: Joonsoo Kim <iamjoonsoo.kim@....com> Cc: Jesper Dangaard Brouer <brouer@...hat.com> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org> --- mm/slab.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/mm/slab.c b/mm/slab.c index 4807cf4..8bca9be 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -2169,7 +2169,6 @@ __kmem_cache_create (struct kmem_cache *cachep, unsigned long flags) else size += BYTES_PER_WORD; } -#if FORCED_DEBUG && defined(CONFIG_DEBUG_PAGEALLOC) /* * To activate debug pagealloc, off-slab management is necessary * requirement. In early phase of initialization, small sized slab @@ -2177,7 +2176,7 @@ __kmem_cache_create (struct kmem_cache *cachep, unsigned long flags) * to check size >= 256. It guarantees that all necessary small * sized slab is initialized in current slab initialization sequence. */ - if (debug_pagealloc_enabled() && + if (debug_pagealloc_enabled() && (flags & SLAB_POISON) && !slab_early_init && size >= kmalloc_size(INDEX_NODE) && size >= 256 && cachep->object_size > cache_line_size() && ALIGN(size, cachep->align) < PAGE_SIZE) { @@ -2185,7 +2184,6 @@ __kmem_cache_create (struct kmem_cache *cachep, unsigned long flags) size = PAGE_SIZE; } #endif -#endif /* * Determine if the slab management is 'on' or 'off' slab. -- 1.9.1
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