From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1E33BC55185 for ; Sun, 26 Apr 2020 03:05:09 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 92F00206ED for ; Sun, 26 Apr 2020 03:05:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 92F00206ED Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=I-love.SAKURA.ne.jp Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 0AE228E0005; Sat, 25 Apr 2020 23:05:08 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 05E6B8E0003; Sat, 25 Apr 2020 23:05:07 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id EB6678E0005; Sat, 25 Apr 2020 23:05:07 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0020.hostedemail.com [216.40.44.20]) by kanga.kvack.org (Postfix) with ESMTP id D0D488E0003 for ; Sat, 25 Apr 2020 23:05:07 -0400 (EDT) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 991C652B2 for ; Sun, 26 Apr 2020 03:05:07 +0000 (UTC) X-FDA: 76748514654.14.shoes43_2ca5911cfc045 X-HE-Tag: shoes43_2ca5911cfc045 X-Filterd-Recvd-Size: 2420 Received: from www262.sakura.ne.jp (www262.sakura.ne.jp [202.181.97.72]) by imf48.hostedemail.com (Postfix) with ESMTP for ; Sun, 26 Apr 2020 03:05:06 +0000 (UTC) Received: from fsav109.sakura.ne.jp (fsav109.sakura.ne.jp [27.133.134.236]) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTP id 03Q34xxQ018442; Sun, 26 Apr 2020 12:04:59 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Received: from www262.sakura.ne.jp (202.181.97.72) by fsav109.sakura.ne.jp (F-Secure/fsigk_smtp/550/fsav109.sakura.ne.jp); Sun, 26 Apr 2020 12:04:59 +0900 (JST) X-Virus-Status: clean(F-Secure/fsigk_smtp/550/fsav109.sakura.ne.jp) Received: from [192.168.1.9] (M106072142033.v4.enabler.ne.jp [106.72.142.33]) (authenticated bits=0) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTPSA id 03Q34xmY018439 (version=TLSv1.2 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sun, 26 Apr 2020 12:04:59 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Subject: Re: [patch] mm, oom: stop reclaiming if GFP_ATOMIC will start failing soon To: Andrew Morton , David Rientjes Cc: Vlastimil Babka , linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20200425172706.26b5011293e8dc77b1dccaf3@linux-foundation.org> From: Tetsuo Handa Message-ID: Date: Sun, 26 Apr 2020 12:04:56 +0900 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200425172706.26b5011293e8dc77b1dccaf3@linux-foundation.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 2020/04/26 9:27, Andrew Morton wrote: > Well, what's really going on here? > > Is networking potentially consuming an unbounded amount of memory? If > so, then killing a process will just cause networking to consume more > memory then hit against the same thing. So presumably the answer is > "no, the watermarks are inappropriately set for this workload". Maybe somebody is abusing __GFP_MEMALLOC allocations. David, please include whole context (e.g. which function from which process) instead of only memory stat lines.