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authorStanislaw Gruszka <sgruszka@redhat.com>2012-01-10 15:07:32 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-10 16:30:43 -0800
commitfc8d8620d39dbbaf412b1b9247d77d196d92adb9 (patch)
treeaab70c3807026701f326bb8a88c81845da059d9b /mm
parentc6968e73b90c2a2fb9a32d4bad249f8f70f70125 (diff)
downloadlinux-fc8d8620d39dbbaf412b1b9247d77d196d92adb9.tar.bz2
slub: min order when debug_guardpage_minorder > 0
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. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Andrea Arcangeli <aarcange@redhat.com> Acked-by: Christoph Lameter <cl@linux.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Stanislaw Gruszka <sgruszka@redhat.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/slub.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/slub.c b/mm/slub.c
index 025f6ac51569..d99acbf14e01 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3654,6 +3654,9 @@ 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 *);