Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932431AbcCHJ5P (ORCPT ); Tue, 8 Mar 2016 04:57:15 -0500 Received: from mail-pf0-f194.google.com ([209.85.192.194]:33877 "EHLO mail-pf0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753525AbcCHJ5F (ORCPT ); Tue, 8 Mar 2016 04:57:05 -0500 Date: Tue, 8 Mar 2016 18:58:24 +0900 From: Sergey Senozhatsky To: Michal Hocko Cc: Hugh Dickins , Sergey Senozhatsky , Andrew Morton , Linus Torvalds , Johannes Weiner , Mel Gorman , David Rientjes , Tetsuo Handa , Hillf Danton , KAMEZAWA Hiroyuki , linux-mm@kvack.org, LKML , Joonsoo Kim , Vlastimil Babka Subject: Re: [PATCH] mm, oom: protect !costly allocations some more (was: Re: [PATCH 0/3] OOM detection rework v4) Message-ID: <20160308095824.GA457@swordfish> References: <1450203586-10959-1-git-send-email-mhocko@kernel.org> <20160203132718.GI6757@dhcp22.suse.cz> <20160225092315.GD17573@dhcp22.suse.cz> <20160229210213.GX16930@dhcp22.suse.cz> <20160307160838.GB5028@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160307160838.GB5028@dhcp22.suse.cz> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1423 Lines: 45 On (03/07/16 17:08), Michal Hocko wrote: > On Mon 29-02-16 22:02:13, Michal Hocko wrote: > > Andrew, > > could you queue this one as well, please? This is more a band aid than a > > real solution which I will be working on as soon as I am able to > > reproduce the issue but the patch should help to some degree at least. > > Joonsoo wasn't very happy about this approach so let me try a different > way. What do you think about the following? Hugh, Sergey does it help > for your load? I have tested it with the Hugh's load and there was no > major difference from the previous testing so at least nothing has blown > up as I am not able to reproduce the issue here. > > Other changes in the compaction are still needed but I would like to not > depend on them right now. works fine for me. $ cat /proc/vmstat | egrep -e "compact|swap" pgsteal_kswapd_dma 7 pgsteal_kswapd_dma32 6457075 pgsteal_kswapd_normal 1462767 pgsteal_kswapd_movable 0 pgscan_kswapd_dma 18 pgscan_kswapd_dma32 6544126 pgscan_kswapd_normal 1495604 pgscan_kswapd_movable 0 kswapd_inodesteal 29 kswapd_low_wmark_hit_quickly 1168 kswapd_high_wmark_hit_quickly 1627 compact_migrate_scanned 5762793 compact_free_scanned 54090239 compact_isolated 1303895 compact_stall 1542 compact_fail 1117 compact_success 425 compact_kcompatd_wake 0 no OOM-kills after 6 rounds of tests. Tested-by: Sergey Senozhatsky thanks! -ss