Commit fc8d8620 authored Jan 10, 2012 by Stanislaw Gruszka Committed by Linus Torvalds Jan 10, 2012

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>

parent c6968e73

mm/slub.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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 *);

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