From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f174.google.com (mail-wi0-f174.google.com [209.85.212.174]) by kanga.kvack.org (Postfix) with ESMTP id ADD3082BEF for ; Sun, 9 Nov 2014 04:35:22 -0500 (EST) Received: by mail-wi0-f174.google.com with SMTP id d1so7850511wiv.1 for ; Sun, 09 Nov 2014 01:35:22 -0800 (PST) Received: from mx2.suse.de (cantor2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id bd10si24006429wjc.128.2014.11.09.01.35.21 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 09 Nov 2014 01:35:21 -0800 (PST) Message-ID: <545F3556.5000802@suse.cz> Date: Sun, 09 Nov 2014 10:35:18 +0100 From: Vlastimil Babka MIME-Version: 1.0 Subject: Re: Early test: hangs in mm/compact.c w. Linus's 12d7aacab56e9ef185c References: <00a801cffbd8$434189b0$c9c49d10$@alibaba-inc.com> <1433036.WjB5pb09Zh@xorhgos3.pefnos> In-Reply-To: <1433036.WjB5pb09Zh@xorhgos3.pefnos> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: "P. Christeas" , Hillf Danton , linux-kernel Cc: linux-mm@kvack.org On 11/09/2014 09:22 AM, P. Christeas wrote: > On Sunday 09 November 2014, Hillf Danton wrote: >> - return COMPACT_CONTINUE; >> + return COMPACT_SKIPPED; > > I guess this one would mitigate against Vlastmil's migration scanner issue, > wouldn't it? Please no, that's a wrong fix. The purpose of compaction is to make the high-order watermark meet, not give up. > In that case, I should wait a bit[1] to try the first patch, then revert, try > yours and (hopefully) have some results. I hope my patch will be enough, > Then, apply both. > > [1] trying to push the vm by loading memory-hungry apps and random load. Maybe the tools/testing/selftests/vm/transhuge-stress could help -- 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