From: Stanislaw Gruszka <sgruszka@redhat.com>
To: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org, Mel Gorman <mgorman@suse.de>,
Andrea Arcangeli <aarcange@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Rafael J. Wysocki" <rjw@sisk.pl>,
Christoph Lameter <cl@linux-foundation.org>,
Stanislaw Gruszka <sgruszka@redhat.com>
Subject: [PATCH v3 3/3] slub: min order when debug_guardpage_minorder > 0
Date: Fri, 18 Nov 2011 17:25:07 +0100 [thread overview]
Message-ID: <1321633507-13614-3-git-send-email-sgruszka@redhat.com> (raw)
In-Reply-To: <1321633507-13614-1-git-send-email-sgruszka@redhat.com>
Disable slub debug facilities and allocate slabs at minimal order when
debug_guardpage_minorder > 0 to increase probability to catch random
memory corruption by cpu exception.
v1 -> v2:
- use slub_max_order to minimalize slub order
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
---
mm/slub.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c
index 7d2a996..a66be56 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3645,6 +3645,9 @@ void __init kmem_cache_init(void)
struct kmem_cache *temp_kmem_cache_node;
unsigned long kmalloc_size;
+ if (debug_guardpage_minorder())
+ slub_max_order = 0;
+
kmem_size = offsetof(struct kmem_cache, node) +
nr_node_ids * sizeof(struct kmem_cache_node *);
--
1.7.1
--
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next prev parent reply other threads:[~2011-11-18 16:23 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-18 16:25 [PATCH v2 1/3] mm: more intensive memory corruption debug Stanislaw Gruszka
2011-11-18 16:25 ` [PATCH v2 2/3] PM / Hibernate : do not count debug pages as savable Stanislaw Gruszka
2011-11-18 16:25 ` Stanislaw Gruszka [this message]
2011-11-21 17:15 ` [PATCH v3 3/3] slub: min order when debug_guardpage_minorder > 0 Christoph Lameter
2011-12-07 22:07 ` David Rientjes
2011-12-08 7:33 ` Stanislaw Gruszka
2011-12-08 21:06 ` David Rientjes
2011-12-12 14:59 ` [PATCH -mm] slub: document setting min order with " Stanislaw Gruszka
2011-12-12 23:21 ` Rafael J. Wysocki
2011-12-14 0:41 ` David Rientjes
2011-12-16 13:21 ` Stanislaw Gruszka
2011-12-16 13:23 ` [PATCH -mm] slub: debug_guardpage_minorder documentation tweak Stanislaw Gruszka
2011-12-16 21:16 ` David Rientjes
2012-01-06 17:52 ` David Rientjes
2011-11-22 21:56 ` [PATCH v2 1/3] mm: more intensive memory corruption debug Andrew Morton
2011-11-23 13:25 ` Stanislaw Gruszka
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