From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758162Ab1KRQXP (ORCPT ); Fri, 18 Nov 2011 11:23:15 -0500 Received: from mx1.redhat.com ([209.132.183.28]:13198 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757929Ab1KRQXO (ORCPT ); Fri, 18 Nov 2011 11:23:14 -0500 From: Stanislaw Gruszka To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, Mel Gorman , Andrea Arcangeli , Andrew Morton , "Rafael J. Wysocki" , Christoph Lameter , Stanislaw Gruszka Subject: [PATCH v3 3/3] slub: min order when debug_guardpage_minorder > 0 Date: Fri, 18 Nov 2011 17:25:07 +0100 Message-Id: <1321633507-13614-3-git-send-email-sgruszka@redhat.com> In-Reply-To: <1321633507-13614-1-git-send-email-sgruszka@redhat.com> References: <1321633507-13614-1-git-send-email-sgruszka@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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