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From: Joonsoo Kim <js1304@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Lameter <cl@linux.com>,
	Pekka Enberg <penberg@kernel.org>,
	David Rientjes <rientjes@google.com>,
	Joonsoo Kim <iamjoonsoo.kim@lge.com>,
	Jesper Dangaard Brouer <brouer@redhat.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH 04/16] mm/slab: activate debug_pagealloc in SLAB when it is actually enabled
Date: Thu, 14 Jan 2016 14:24:17 +0900	[thread overview]
Message-ID: <1452749069-15334-5-git-send-email-iamjoonsoo.kim@lge.com> (raw)
In-Reply-To: <1452749069-15334-1-git-send-email-iamjoonsoo.kim@lge.com>

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
---
 mm/slab.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/mm/slab.c b/mm/slab.c
index bbe4df2..4b55516 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1838,7 +1838,8 @@ static void slab_destroy_debugcheck(struct kmem_cache *cachep,
 
 		if (cachep->flags & SLAB_POISON) {
 #ifdef CONFIG_DEBUG_PAGEALLOC
-			if (cachep->size % PAGE_SIZE == 0 &&
+			if (debug_pagealloc_enabled() &&
+				cachep->size % PAGE_SIZE == 0 &&
 					OFF_SLAB(cachep))
 				kernel_map_pages(virt_to_page(objp),
 					cachep->size / PAGE_SIZE, 1);
@@ -2176,7 +2177,8 @@ __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 (!slab_early_init && size >= kmalloc_size(INDEX_NODE) &&
+	if (debug_pagealloc_enabled() &&
+		!slab_early_init && size >= kmalloc_size(INDEX_NODE) &&
 		size >= 256 && cachep->object_size > cache_line_size() &&
 		ALIGN(size, cachep->align) < PAGE_SIZE) {
 		cachep->obj_offset += PAGE_SIZE - ALIGN(size, cachep->align);
@@ -2232,7 +2234,8 @@ __kmem_cache_create (struct kmem_cache *cachep, unsigned long flags)
 		 * poisoning, then it's going to smash the contents of
 		 * the redzone and userword anyhow, so switch them off.
 		 */
-		if (size % PAGE_SIZE == 0 && flags & SLAB_POISON)
+		if (debug_pagealloc_enabled() &&
+			size % PAGE_SIZE == 0 && flags & SLAB_POISON)
 			flags &= ~(SLAB_RED_ZONE | SLAB_STORE_USER);
 #endif
 	}
@@ -2716,7 +2719,8 @@ static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp,
 	set_obj_status(page, objnr, OBJECT_FREE);
 	if (cachep->flags & SLAB_POISON) {
 #ifdef CONFIG_DEBUG_PAGEALLOC
-		if ((cachep->size % PAGE_SIZE)==0 && OFF_SLAB(cachep)) {
+		if (debug_pagealloc_enabled() &&
+			(cachep->size % PAGE_SIZE) == 0 && OFF_SLAB(cachep)) {
 			store_stackinfo(cachep, objp, caller);
 			kernel_map_pages(virt_to_page(objp),
 					 cachep->size / PAGE_SIZE, 0);
@@ -2861,7 +2865,8 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep,
 		return objp;
 	if (cachep->flags & SLAB_POISON) {
 #ifdef CONFIG_DEBUG_PAGEALLOC
-		if ((cachep->size % PAGE_SIZE) == 0 && OFF_SLAB(cachep))
+		if (debug_pagealloc_enabled() &&
+			(cachep->size % PAGE_SIZE) == 0 && OFF_SLAB(cachep))
 			kernel_map_pages(virt_to_page(objp),
 					 cachep->size / PAGE_SIZE, 1);
 		else
-- 
1.9.1

  parent reply	other threads:[~2016-01-14  5:28 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-14  5:24 [PATCH 00/16] mm/slab: introduce new freed objects management way, OBJFREELIST_SLAB Joonsoo Kim
2016-01-14  5:24 ` [PATCH 01/16] mm/slab: fix stale code comment Joonsoo Kim
2016-01-14 15:22   ` Christoph Lameter
2016-01-14  5:24 ` [PATCH 02/16] mm/slab: remove useless structure define Joonsoo Kim
2016-01-14 15:22   ` Christoph Lameter
2016-01-14  5:24 ` [PATCH 03/16] mm/slab: remove the checks for slab implementation bug Joonsoo Kim
2016-01-14 15:23   ` Christoph Lameter
2016-01-14 16:20     ` Joonsoo Kim
2016-01-14  5:24 ` Joonsoo Kim [this message]
2016-01-14 12:09   ` [PATCH 04/16] mm/slab: activate debug_pagealloc in SLAB when it is actually enabled Jesper Dangaard Brouer
2016-01-14 16:16     ` Joonsoo Kim
2016-01-14  5:24 ` [PATCH 05/16] mm/slab: use more appropriate condition check for debug_pagealloc Joonsoo Kim
2016-01-14  5:24 ` [PATCH 06/16] mm/slab: clean-up DEBUG_PAGEALLOC processing code Joonsoo Kim
2016-01-14  5:24 ` [PATCH 07/16] mm/slab: alternative implementation for DEBUG_SLAB_LEAK Joonsoo Kim
2016-01-14  5:24 ` [PATCH 08/16] mm/slab: remove object status buffer " Joonsoo Kim
2016-01-14  5:24 ` [PATCH 09/16] mm/slab: put the freelist at the end of slab page Joonsoo Kim
2016-01-14 15:26   ` Christoph Lameter
2016-01-14 16:21     ` Joonsoo Kim
2016-01-14 17:13   ` Christoph Lameter
2016-01-14  5:24 ` [PATCH 10/16] mm/slab: align cache size first before determination of OFF_SLAB candidate Joonsoo Kim
2016-01-14  5:24 ` [PATCH 11/16] mm/slab: clean-up cache type determination Joonsoo Kim
2016-01-14  5:24 ` [PATCH 12/16] mm/slab: do not change cache size if debug pagealloc isn't possible Joonsoo Kim
2016-01-14  5:24 ` [PATCH 13/16] mm/slab: make criteria for off slab determination robust and simple Joonsoo Kim
2016-01-14  5:24 ` [PATCH 14/16] mm/slab: factor out slab list fixup code Joonsoo Kim
2016-01-14  5:24 ` [PATCH 15/16] mm/slab: factor out debugging initialization in cache_init_objs() Joonsoo Kim
2016-01-14  5:24 ` [PATCH 16/16] mm/slab: introduce new slab management type, OBJFREELIST_SLAB Joonsoo Kim
2016-01-14 15:32   ` Christoph Lameter
2016-01-14 16:24     ` Joonsoo Kim
2016-01-27 13:35   ` Vlastimil Babka
2016-01-27 16:48     ` Christoph Lameter
2016-01-27 17:18       ` Vlastimil Babka
2016-01-27 17:55         ` Christoph Lameter
2016-01-28  4:51     ` Joonsoo Kim
2016-01-29 15:21       ` Vlastimil Babka
2016-01-27  4:40 ` [PATCH 00/16] mm/slab: introduce new freed objects management way, OBJFREELIST_SLAB Andrew Morton
2016-01-27  4:46   ` Joonsoo Kim

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