From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S941986AbcLWM5k (ORCPT ); Fri, 23 Dec 2016 07:57:40 -0500 Received: from mx2.suse.de ([195.135.220.15]:40609 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S938902AbcLWM5j (ORCPT ); Fri, 23 Dec 2016 07:57:39 -0500 Date: Fri, 23 Dec 2016 13:57:28 +0100 From: Michal Hocko To: Nils Holland Cc: Tetsuo Handa , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Chris Mason , David Sterba , linux-btrfs@vger.kernel.org Subject: Re: OOM: Better, but still there on Message-ID: <20161223125728.GE23109@dhcp22.suse.cz> References: <862a1ada-17f1-9cff-c89b-46c47432e89f@I-love.SAKURA.ne.jp> <20161217210646.GA11358@boerne.fritz.box> <20161219134534.GC5164@dhcp22.suse.cz> <20161220020829.GA5449@boerne.fritz.box> <20161221073658.GC16502@dhcp22.suse.cz> <20161222101028.GA11105@ppc-nas.fritz.box> <20161222191719.GA19898@dhcp22.suse.cz> <20161222214611.GA3015@boerne.fritz.box> <20161223105157.GB23109@dhcp22.suse.cz> <20161223121851.GA27413@ppc-nas.fritz.box> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20161223121851.GA27413@ppc-nas.fritz.box> 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 Fri 23-12-16 13:18:51, Nils Holland wrote: > On Fri, Dec 23, 2016 at 11:51:57AM +0100, Michal Hocko wrote: > > TL;DR > > drop the last patch, check whether memory cgroup is enabled and retest > > with cgroup_disable=memory to see whether this is memcg related and if > > it is _not_ then try to test with the patch below > > Right, it seems we might be looking in the right direction! So I > removed the previous patch from my kernel and verified if memory > cgroup was enabled, and indeed, it was. So I booted with > cgroup_disable=memory and ran my ordinary test again ... and in fact, > no ooms! OK, thanks for confirmation. I could have figured that earlier. The pagecache differences in such a short time should have raised the red flag and point towards memcgs... [...] > > I would appreciate to stick with your setup to not pull new unknows into > > the picture. > > No problem! It's just likely that I won't be able to test during the > following days until Dec 27th, but after that I should be back to > normal and thus be able to run further tests in a timely fashion. :-) no problem at all. I will try to cook up a patch in the mean time. -- Michal Hocko SUSE Labs