From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1765737AbdAKQdG (ORCPT ); Wed, 11 Jan 2017 11:33:06 -0500 Received: from mx2.suse.de ([195.135.220.15]:41371 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758761AbdAKQdE (ORCPT ); Wed, 11 Jan 2017 11:33:04 -0500 Date: Wed, 11 Jan 2017 17:33:01 +0100 From: Michal Hocko To: Vlastimil Babka Cc: Ganapatrao Kulkarni , linux-mm@kvack.org, "linux-kernel@vger.kernel.org" Subject: Re: getting oom/stalls for ltp test cpuset01 with latest/4.9 kernel Message-ID: <20170111163301.GI16365@dhcp22.suse.cz> References: <075075cc-3149-0df3-dd45-a81df1f1a506@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <075075cc-3149-0df3-dd45-a81df1f1a506@suse.cz> User-Agent: Mutt/1.6.0 (2016-04-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed 11-01-17 12:05:44, Vlastimil Babka wrote: > On 01/11/2017 11:50 AM, Ganapatrao Kulkarni wrote: > > Hi, > > > > we are seeing OOM/stalls messages when we run ltp cpuset01(cpuset01 -I > > 360) test for few minutes, even through the numa system has adequate > > memory on both nodes. > > > > this we have observed same on both arm64/thunderx numa and on x86 numa system! > > > > using latest ltp from master branch version 20160920-197-gbc4d3db > > and linux kernel version 4.9 > > > > is this known bug already? > > Probably not. > > Is it possible that cpuset limits the process to one node, and numa > mempolicy to the other node? No this shouldn't happen AFAICS. It is more likely that there is an unrelated memory pressure happenning at the same time. -- Michal Hocko SUSE Labs