From patchwork Fri Apr 17 01:06:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jakub Kicinski X-Patchwork-Id: 11493985 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 09083112C for ; Fri, 17 Apr 2020 01:06:45 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id C474F22245 for ; Fri, 17 Apr 2020 01:06:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="rrhl/gVz" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C474F22245 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id EE41A8E0003; Thu, 16 Apr 2020 21:06:43 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id E958C8E0001; Thu, 16 Apr 2020 21:06:43 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DAACF8E0003; Thu, 16 Apr 2020 21:06:43 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0144.hostedemail.com [216.40.44.144]) by kanga.kvack.org (Postfix) with ESMTP id BC6648E0001 for ; Thu, 16 Apr 2020 21:06:43 -0400 (EDT) Received: from smtpin26.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 8025D5DD7 for ; Fri, 17 Apr 2020 01:06:43 +0000 (UTC) X-FDA: 76715557086.26.land04_57c6e8bcf7f09 X-Spam-Summary: 2,0,0,3359060d4fe7b6d0,d41d8cd98f00b204,kuba@kernel.org,,RULES_HIT:41:355:379:541:966:967:973:988:989:1260:1311:1314:1345:1437:1515:1534:1541:1711:1730:1747:1777:1792:2196:2199:2393:2525:2559:2563:2682:2685:2859:2933:2937:2939:2942:2945:2947:2951:2954:3022:3138:3139:3140:3141:3142:3352:3865:3866:3867:3868:3870:3872:3874:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4250:4385:4605:5007:6261:6653:7875:7903:8603:9025:10004:11026:11658:11914:12043:12291:12295:12297:12438:12517:12519:12679:12683:12895:13069:13161:13229:13255:13311:13357:13894:14095:14181:14384:14394:14721:21080:21450:21451:21627:21740:22013:30054:30070,0,RBL:198.145.29.99:@kernel.org:.lbl8.mailshell.net-64.201.201.201 62.14.0.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: land04_57c6e8bcf7f09 X-Filterd-Recvd-Size: 2697 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf39.hostedemail.com (Postfix) with ESMTP for ; Fri, 17 Apr 2020 01:06:43 +0000 (UTC) Received: from kicinski-fedora-PC1C0HJN.thefacebook.com (unknown [163.114.132.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0880F20776; Fri, 17 Apr 2020 01:06:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587085602; bh=9icVWG0gyR32riSUJgQiR5peqCOVsPBMCFCA6dSTpKI=; h=From:To:Cc:Subject:Date:From; b=rrhl/gVzXRUQQkLm+GhPI4UHgVoR7wYFRawXF5o2ZeJmR3zDNAIop5lCMmX8vZ22M ElbQdQ5QnlHD115XAZPvpp1vk61hzWyCFdgQI89NY2yH08GCI8hBMqe+L8e7xSOT9F xBFB/XbiA2cH0d6/wgn9BHzm4JljBWgUuQoOa/Mg= From: Jakub Kicinski To: akpm@linux-foundation.org Cc: linux-mm@kvack.org, kernel-team@fb.com, tj@kernel.org, hannes@cmpxchg.org, chris@chrisdown.name, cgroups@vger.kernel.org, Jakub Kicinski Subject: [PATCH 0/3] memcg: Slow down swap allocation as the available space gets depleted Date: Thu, 16 Apr 2020 18:06:14 -0700 Message-Id: <20200417010617.927266-1-kuba@kernel.org> X-Mailer: git-send-email 2.25.2 MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000144, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Tejun describes the problem as follows: When swap runs out, there's an abrupt change in system behavior - the anonymous memory suddenly becomes unmanageable which readily breaks any sort of memory isolation and can bring down the whole system. To avoid that, oomd [1] monitors free swap space and triggers kills when it drops below the specific threshold (e.g. 15%). While this works, it's far from ideal: - Depending on IO performance and total swap size, a given headroom might not be enough or too much. - oomd has to monitor swap depletion in addition to the usual pressure metrics and it currently doesn't consider memory.swap.max. Solve this by adapting the same approach that memory.high uses - slow down allocation as the resource gets depleted turning the depletion behavior from abrupt cliff one to gradual degradation observable through memory pressure metric. [1] https://github.com/facebookincubator/oomd Jakub Kicinski (3): mm: prepare for swap over-high accounting and penalty calculation mm: move penalty delay clamping out of calculate_high_delay() mm: automatically penalize tasks with high swap use include/linux/memcontrol.h | 4 + mm/memcontrol.c | 166 ++++++++++++++++++++++++++++--------- 2 files changed, 131 insertions(+), 39 deletions(-)