From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753744AbcIOSvm (ORCPT ); Thu, 15 Sep 2016 14:51:42 -0400 Received: from mail-lf0-f66.google.com ([209.85.215.66]:32929 "EHLO mail-lf0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752955AbcIOSve (ORCPT ); Thu, 15 Sep 2016 14:51:34 -0400 From: Arkadiusz Miskiewicz Reply-To: arekm@maven.pl Organization: Do not reply to gmail address. Write to arekm@maven.pl instead. To: Vlastimil Babka Subject: Re: [PATCH 0/4] reintroduce compaction feedback for OOM decisions Date: Thu, 15 Sep 2016 20:51:25 +0200 User-Agent: KMail/1.13.7 (Linux/4.8.0-rc6-00180-g5924bbe; KDE/4.14.22; x86_64; ; ) Cc: Michal Hocko , Andrew Morton , "Ralf-Peter Rohbeck" , Olaf Hering , linux-kernel@vger.kernel.org, Linus Torvalds , linux-mm@kvack.org, David Rientjes , Joonsoo Kim , Mel Gorman , Michal Hocko , Rik van Riel References: <20160906135258.18335-1-vbabka@suse.cz> In-Reply-To: <20160906135258.18335-1-vbabka@suse.cz> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Message-Id: <201609152051.25268.a.miskiewicz@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id u8FIpkqT007979 On Tuesday 06 of September 2016, Vlastimil Babka wrote: > After several people reported OOM's for order-2 allocations in 4.7 due to > Michal Hocko's OOM rework, he reverted the part that considered compaction > feedback [1] in the decisions to retry reclaim/compaction. This was to > provide a fix quickly for 4.8 rc and 4.7 stable series, while mmotm had an > almost complete solution that instead improved compaction reliability. > > This series completes the mmotm solution and reintroduces the compaction > feedback into OOM decisions. The first two patches restore the state of > mmotm before the temporary solution was merged, the last patch should be > the missing piece for reliability. The third patch restricts the hardened > compaction to non-costly orders, since costly orders don't result in OOMs > in the first place. > > Some preliminary testing suggested that this approach should work, but I > would like to ask all who experienced the regression to please retest > this. You will need to apply this series on top of tag > mmotm-2016-08-31-16-06 from the mmotm git tree [2]. Thanks in advance! My "rm -rf copyX; cp -al org copyX" test x10 in parallel worked without any OOM. -- Arkadiusz Miśkiewicz, arekm / ( maven.pl | pld-linux.org ) From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f70.google.com (mail-wm0-f70.google.com [74.125.82.70]) by kanga.kvack.org (Postfix) with ESMTP id 8E2C46B0038 for ; Thu, 15 Sep 2016 14:51:29 -0400 (EDT) Received: by mail-wm0-f70.google.com with SMTP id 1so36820438wmz.2 for ; Thu, 15 Sep 2016 11:51:29 -0700 (PDT) Received: from mail-lf0-x242.google.com (mail-lf0-x242.google.com. [2a00:1450:4010:c07::242]) by mx.google.com with ESMTPS id f11si2860615lfb.309.2016.09.15.11.51.27 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 15 Sep 2016 11:51:28 -0700 (PDT) Received: by mail-lf0-x242.google.com with SMTP id s64so3845535lfs.2 for ; Thu, 15 Sep 2016 11:51:27 -0700 (PDT) From: Arkadiusz Miskiewicz Reply-To: arekm@maven.pl Subject: Re: [PATCH 0/4] reintroduce compaction feedback for OOM decisions Date: Thu, 15 Sep 2016 20:51:25 +0200 References: <20160906135258.18335-1-vbabka@suse.cz> In-Reply-To: <20160906135258.18335-1-vbabka@suse.cz> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <201609152051.25268.a.miskiewicz@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: Vlastimil Babka Cc: Michal Hocko , Andrew Morton , Ralf-Peter Rohbeck , Olaf Hering , linux-kernel@vger.kernel.org, Linus Torvalds , linux-mm@kvack.org, David Rientjes , Joonsoo Kim , Mel Gorman , Michal Hocko , Rik van Riel On Tuesday 06 of September 2016, Vlastimil Babka wrote: > After several people reported OOM's for order-2 allocations in 4.7 due to > Michal Hocko's OOM rework, he reverted the part that considered compaction > feedback [1] in the decisions to retry reclaim/compaction. This was to > provide a fix quickly for 4.8 rc and 4.7 stable series, while mmotm had an > almost complete solution that instead improved compaction reliability. >=20 > This series completes the mmotm solution and reintroduces the compaction > feedback into OOM decisions. The first two patches restore the state of > mmotm before the temporary solution was merged, the last patch should be > the missing piece for reliability. The third patch restricts the hardened > compaction to non-costly orders, since costly orders don't result in OOMs > in the first place. >=20 > Some preliminary testing suggested that this approach should work, but I > would like to ask all who experienced the regression to please retest > this. You will need to apply this series on top of tag > mmotm-2016-08-31-16-06 from the mmotm git tree [2]. Thanks in advance! My "rm -rf copyX; cp -al org copyX" test x10 in parallel worked without any= =20 OOM. =2D-=20 Arkadiusz Mi=C5=9Bkiewicz, arekm / ( maven.pl | pld-linux.org ) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org