Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D28B4C4332F for ; Wed, 29 Dec 2021 23:46:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233421AbhL2Xp7 (ORCPT ); Wed, 29 Dec 2021 18:45:59 -0500 Received: from sin.source.kernel.org ([145.40.73.55]:50912 "EHLO sin.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231881AbhL2Xp5 (ORCPT ); Wed, 29 Dec 2021 18:45:57 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id EDE49CE1A2D; Wed, 29 Dec 2021 23:45:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9C5F5C36AEA; Wed, 29 Dec 2021 23:45:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1640821554; bh=dY5gYi5AkIP2+p4HXO+O9a3TyRp3lgzPpmtlA7gCn8o=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=pA/X3yUYAg2zrhiisVScrdIBKB37ZcdHsuCigc9sx9hMzrxvQSUKWM1/KgXTi9LpZ NvmZxusSmCLsXPFG9RGozBP1glGiIZKfYnSuQBYWad2HSgOA8LHaHys6kxns/RBzh4 DCP+l+e3E5gRstnJ6HseDvWVJggpmcBxXKz9H0HM= Date: Wed, 29 Dec 2021 15:45:53 -0800 From: Andrew Morton To: Thorsten Leemhuis Cc: Mel Gorman , Mark Brown , Michal Hocko , Vlastimil Babka , Alexey Avramov , Rik van Riel , Mike Galbraith , Darrick Wong , regressions@lists.linux.dev, Linux-fsdevel , Linux-MM , LKML Subject: Re: [PATCH v4 1/1] mm: vmscan: Reduce throttling due to a failure to make progress Message-Id: <20211229154553.09dd5bb657bc19d45c3de8dd@linux-foundation.org> In-Reply-To: References: <20211202150614.22440-1-mgorman@techsingularity.net> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.32; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 28 Dec 2021 11:04:18 +0100 Thorsten Leemhuis wrote: > Hi, this is your Linux kernel regression tracker speaking. > > On 02.12.21 16:06, Mel Gorman wrote: > > Mike Galbraith, Alexey Avramov and Darrick Wong all reported similar > > problems due to reclaim throttling for excessive lengths of time. > > In Alexey's case, a memory hog that should go OOM quickly stalls for > > several minutes before stalling. In Mike and Darrick's cases, a small > > memcg environment stalled excessively even though the system had enough > > memory overall. > > Just wondering: this patch afaics is now in -mm and Linux next for > nearly two weeks. Is that intentional? I had expected it to be mainlined > with the batch of patches Andrew mailed to Linus last week, but it > wasn't among them. I have it queued for 5.17-rc1. There is still time to squeeze it into 5.16, just, with a cc:stable. Alternatively we could merge it into 5.17-rc1 with a cc:stable, so it will trickle back with less risk to the 5.17 release. What do people think?