From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934064Ab3LIQr0 (ORCPT ); Mon, 9 Dec 2013 11:47:26 -0500 Received: from mx1.redhat.com ([209.132.183.28]:17475 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934008Ab3LIQrX (ORCPT ); Mon, 9 Dec 2013 11:47:23 -0500 Message-ID: <52A5F40F.40206@redhat.com> Date: Mon, 09 Dec 2013 11:47:11 -0500 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7 MIME-Version: 1.0 To: Mel Gorman CC: Andrew Morton , Alex Thorlton , Linux-MM , LKML Subject: Re: [PATCH 14/18] mm: numa: Limit scope of lock for NUMA migrate rate limiting References: <1386572952-1191-1-git-send-email-mgorman@suse.de> <1386572952-1191-15-git-send-email-mgorman@suse.de> In-Reply-To: <1386572952-1191-15-git-send-email-mgorman@suse.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/09/2013 02:09 AM, Mel Gorman wrote: > NUMA migrate rate limiting protects a migration counter and window using > a lock but in some cases this can be a contended lock. It is not > critical that the number of pages be perfect, lost updates are > acceptable. Reduce the importance of this lock. > > Signed-off-by: Mel Gorman Reviewed-by: Rik van Riel -- All rights reversed