From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756125Ab2DWXuy (ORCPT ); Mon, 23 Apr 2012 19:50:54 -0400 Received: from mail-iy0-f174.google.com ([209.85.210.174]:38517 "EHLO mail-iy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756086Ab2DWXuu (ORCPT ); Mon, 23 Apr 2012 19:50:50 -0400 Date: Mon, 23 Apr 2012 16:50:48 -0700 (PDT) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Mel Gorman cc: Andrew Morton , Linux-MM , Linux-Netdev , LKML , David Miller , Neil Brown , Peter Zijlstra , Mike Christie , Eric B Munson Subject: Re: [PATCH 01/16] mm: Serialize access to min_free_kbytes In-Reply-To: <1334578624-23257-2-git-send-email-mgorman@suse.de> Message-ID: References: <1334578624-23257-1-git-send-email-mgorman@suse.de> <1334578624-23257-2-git-send-email-mgorman@suse.de> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 16 Apr 2012, 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 Acked-by: David Rientjes