From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tim Blechmann Subject: [PATCH] [RT] avoid preemption in memory controller code Date: Mon, 8 Dec 2008 15:34:14 +0100 Message-ID: <1228746854-23875-1-git-send-email-tim@klingt.org> Cc: linux-kernel@vger.kernel.org, Tim Blechmann To: rostedt@goodmis.org, linux-rt-users@vger.kernel.org Return-path: Received: from mail.klingt.org ([86.59.21.178]:43717 "EHLO klingt.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751778AbYLHOqJ (ORCPT ); Mon, 8 Dec 2008 09:46:09 -0500 Sender: linux-rt-users-owner@vger.kernel.org List-ID: the lru_lock of struct mem_group_per_zone is used to avoid preemption during the __mem_cgroup_stat_add_safe function. therefore, a raw_spinlock_t should be used. Signed-off-by: Tim Blechmann --- mm/memcontrol.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 517f945..8661732 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -95,9 +95,9 @@ enum mem_cgroup_zstat_index { struct mem_cgroup_per_zone { /* - * spin_lock to protect the per cgroup LRU + * raw_spin_lock to protect the per cgroup LRU */ - spinlock_t lru_lock; + raw_spinlock_t lru_lock; struct list_head active_list; struct list_head inactive_list; unsigned long count[NR_MEM_CGROUP_ZSTAT]; -- 1.5.6.3