From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f173.google.com (mail-wi0-f173.google.com [209.85.212.173]) by kanga.kvack.org (Postfix) with ESMTP id A963D6B00C9 for ; Mon, 9 Dec 2013 11:47:21 -0500 (EST) Received: by mail-wi0-f173.google.com with SMTP id hn9so4083730wib.6 for ; Mon, 09 Dec 2013 08:47:21 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTP id t9si1072035wif.6.2013.12.09.08.47.20 for ; Mon, 09 Dec 2013 08:47:20 -0800 (PST) Message-ID: <52A5F40F.40206@redhat.com> Date: Mon, 09 Dec 2013 11:47:11 -0500 From: Rik van Riel MIME-Version: 1.0 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: owner-linux-mm@kvack.org List-ID: To: Mel Gorman Cc: Andrew Morton , Alex Thorlton , Linux-MM , LKML 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org