From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752002AbdCPJIt (ORCPT ); Thu, 16 Mar 2017 05:08:49 -0400 Received: from mx2.suse.de ([195.135.220.15]:59930 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751663AbdCPJIr (ORCPT ); Thu, 16 Mar 2017 05:08:47 -0400 Date: Thu, 16 Mar 2017 10:08:44 +0100 From: Michal Hocko To: lkml@pengaru.com Cc: Gerhard Wiesinger , Minchan Kim , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linus Torvalds Subject: Re: Still OOM problems with 4.9er/4.10er kernels Message-ID: <20170316090844.GG30501@dhcp22.suse.cz> References: <20170104091120.GD25453@dhcp22.suse.cz> <82bce413-1bd7-7f66-1c3d-0d890bbaf6f1@wiesinger.com> <20170227090236.GA2789@bbox> <20170227094448.GF14029@dhcp22.suse.cz> <20170228051723.GD2702@bbox> <20170228081223.GA26792@dhcp22.suse.cz> <20170302071721.GA32632@bbox> <20170316082714.GC30501@dhcp22.suse.cz> <20170316084733.GP802@shells.gnugeneration.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170316084733.GP802@shells.gnugeneration.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu 16-03-17 01:47:33, lkml@pengaru.com wrote: [...] > While on the topic of understanding allocation stalls, Philip Freeman recently > mailed linux-kernel with a similar report, and in his case there are plenty of > page cache pages. It was also a GFP_HIGHUSER_MOVABLE 0-order allocation. care to point me to the report? > I'm no MM expert, but it appears a bit broken for such a low-order allocation > to stall on the order of 10 seconds when there's plenty of reclaimable pages, > in addition to mostly unused and abundant swap space on SSD. yes this might indeed signal a problem. -- Michal Hocko SUSE Labs