From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754737AbbCLQVs (ORCPT ); Thu, 12 Mar 2015 12:21:48 -0400 Received: from mail-ig0-f173.google.com ([209.85.213.173]:43372 "EHLO mail-ig0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932203AbbCLQUh (ORCPT ); Thu, 12 Mar 2015 12:20:37 -0400 MIME-Version: 1.0 In-Reply-To: <20150312131045.GE3406@suse.de> References: <1425741651-29152-1-git-send-email-mgorman@suse.de> <1425741651-29152-5-git-send-email-mgorman@suse.de> <20150307163657.GA9702@gmail.com> <20150308100223.GC15487@gmail.com> <20150309112936.GD26657@destitution> <20150309191943.GF26657@destitution> <20150312131045.GE3406@suse.de> Date: Thu, 12 Mar 2015 09:20:36 -0700 X-Google-Sender-Auth: LT4IHmKkLlcMNuElBW9g0Zcu-io Message-ID: Subject: Re: [PATCH 4/4] mm: numa: Slow PTE scan rate if migration failures occur From: Linus Torvalds To: Mel Gorman Cc: Dave Chinner , Ingo Molnar , Andrew Morton , Aneesh Kumar , Linux Kernel Mailing List , Linux-MM , xfs@oss.sgi.com, ppc-dev Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 12, 2015 at 6:10 AM, Mel Gorman wrote: > > I believe you're correct and it matches what was observed. I'm still > travelling and wireless is dirt but managed to queue a test using pmd_dirty Ok, thanks. I'm not entirely happy with that change, and I suspect the whole heuristic should be looked at much more (maybe it should also look at whether it's executable, for example), but it's a step in the right direction. So I committed it and added a comment, and wrote a commit log about it. I suspect any further work is post-4.0-release, unless somebody comes up with something small and simple and obviously better. Linus