From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752598AbdBOV3K (ORCPT ); Wed, 15 Feb 2017 16:29:10 -0500 Received: from outbound-smtp07.blacknight.com ([46.22.139.12]:47967 "EHLO outbound-smtp07.blacknight.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752555AbdBOV3J (ORCPT ); Wed, 15 Feb 2017 16:29:09 -0500 Date: Wed, 15 Feb 2017 21:29:06 +0000 From: Mel Gorman To: Andrew Morton Cc: Shantanu Goel , Chris Mason , Johannes Weiner , Vlastimil Babka , LKML , Linux-MM Subject: Re: [PATCH 0/3] Reduce amount of time kswapd sleeps prematurely Message-ID: <20170215212906.3myab4545wa2f3yc@techsingularity.net> References: <20170215092247.15989-1-mgorman@techsingularity.net> <20170215123055.b8041d7b6bdbcca9c5fd8dd9@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <20170215123055.b8041d7b6bdbcca9c5fd8dd9@linux-foundation.org> User-Agent: Mutt/1.6.2 (2016-07-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Feb 15, 2017 at 12:30:55PM -0800, Andrew Morton wrote: > On Wed, 15 Feb 2017 09:22:44 +0000 Mel Gorman wrote: > > > This patchset is based on mmots as of Feb 9th, 2016. The baseline is > > important as there are a number of kswapd-related fixes in that tree and > > a comparison against v4.10-rc7 would be almost meaningless as a result. > > It's very late to squeeze this into 4.10. We can make it 4.11 material > and perhaps tag it for backporting into 4.10.1? It would be important that Johannes's patches go along with then because I'm relied on Johannes' fixes to deal with pages being inappropriately written back from reclaim context when I was analysing the workload. I'm thinking specifically about these patches mm-vmscan-scan-dirty-pages-even-in-laptop-mode.patch mm-vmscan-kick-flushers-when-we-encounter-dirty-pages-on-the-lru.patch mm-vmscan-kick-flushers-when-we-encounter-dirty-pages-on-the-lru-fix.patch mm-vmscan-remove-old-flusher-wakeup-from-direct-reclaim-path.patch mm-vmscan-only-write-dirty-pages-that-the-scanner-has-seen-twice.patch mm-vmscan-move-dirty-pages-out-of-the-way-until-theyre-flushed.patch mm-vmscan-move-dirty-pages-out-of-the-way-until-theyre-flushed-fix.patch This is 4.11 material for sure but I would not automatically try merging them to 4.10 unless those patches were also included, ideally with a rerun of just those patches against 4.10 to make sure there are no surprises lurking in there. -- Mel Gorman SUSE Labs