From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757352Ab2BHStA (ORCPT ); Wed, 8 Feb 2012 13:49:00 -0500 Received: from mx1.redhat.com ([209.132.183.28]:57763 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757268Ab2BHSs4 (ORCPT ); Wed, 8 Feb 2012 13:48:56 -0500 Message-ID: <4F32C35F.1090806@redhat.com> Date: Wed, 08 Feb 2012 13:47:59 -0500 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:9.0) Gecko/20111222 Thunderbird/9.0 MIME-Version: 1.0 To: Mel Gorman CC: Andrew Morton , Linux-MM , Linux-Netdev , LKML , David Miller , Neil Brown , Peter Zijlstra Subject: Re: [PATCH 01/15] mm: Serialize access to min_free_kbytes References: <1328568978-17553-1-git-send-email-mgorman@suse.de> <1328568978-17553-2-git-send-email-mgorman@suse.de> In-Reply-To: <1328568978-17553-2-git-send-email-mgorman@suse.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/06/2012 05:56 PM, Mel Gorman wrote: > There is a race between the min_free_kbytes sysctl, memory hotplug > and transparent hugepage support enablement. Memory hotplug uses a > zonelists_mutex to avoid a race when building zonelists. Reuse it to > serialise watermark updates. > > [a.p.zijlstra@chello.nl: Older patch fixed the race with spinlock] > Signed-off-by: Mel Gorman Reviewed-by: Rik van Riel