From fc8d8620d39dbbaf412b1b9247d77d196d92adb9 Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka <sgruszka@redhat.com> Date: Tue, 10 Jan 2012 15:07:32 -0800 Subject: [PATCH] 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> --- mm/slub.c | 3 +++ 1 file changed, 3 insertions(+) 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 *); -- GitLab