From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754524AbaDRR0y (ORCPT ); Fri, 18 Apr 2014 13:26:54 -0400 Received: from mx1.redhat.com ([209.132.183.28]:4101 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752453AbaDRR0u (ORCPT ); Fri, 18 Apr 2014 13:26:50 -0400 Date: Fri, 18 Apr 2014 19:26:31 +0200 From: Oleg Nesterov To: Andrew Morton , Peter Chiang , KAMEZAWA Hiroyuki , Balbir Singh , Michal Hocko , Johannes Weiner Cc: "ccross@android.com" , "lizefan@huawei.com" , "tj@kernel.org" , "pavel@ucw.cz" , "ebiederm@xmission.com" , "guillaume@morinfr.org" , "linux-kernel@vger.kernel.org" Subject: [PATCH 0/2] memcg: mm_update_next_owner() should skip kthreads Message-ID: <20140418172631.GA13323@redhat.com> References: <1397617379-26895-1-git-send-email-pchiang@nvidia.com> <80341664FB79C2419999599F48F738410227327881@HKMAIL01.nvidia.com> <80341664FB79C2419999599F48F738410227327888@HKMAIL01.nvidia.com> <20140416135741.GA9407@redhat.com> <80341664FB79C2419999599F48F7384102273279C3@HKMAIL01.nvidia.com> <20140418162359.GA4398@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140418162359.GA4398@redhat.com> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/18, Oleg Nesterov wrote: > > Hmm. I seem to see a bug in this function, it can be fulled by use_mm, > but I am not sure this can explain the problem. I'll send a patch. Untested, please review. But it really looks "obviously wrong", and note that unuse_mm() doesn't do mm_update_next_owner(). (just in case, do not confuse it with unuse_mm() in mm/swapfile.c). Oleg.