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=-2.3 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 5790CC83000 for ; Tue, 28 Apr 2020 23:37:38 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id E4DC52070B for ; Tue, 28 Apr 2020 23:37:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E4DC52070B 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 5926C8E0005; Tue, 28 Apr 2020 19:37:37 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 542AF8E0001; Tue, 28 Apr 2020 19:37:37 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 458818E0005; Tue, 28 Apr 2020 19:37:37 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0149.hostedemail.com [216.40.44.149]) by kanga.kvack.org (Postfix) with ESMTP id 2B6FD8E0001 for ; Tue, 28 Apr 2020 19:37:37 -0400 (EDT) Received: from smtpin07.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id DA5D7181AEF09 for ; Tue, 28 Apr 2020 23:37:36 +0000 (UTC) X-FDA: 76758878112.07.apple46_82704af55c17 X-HE-Tag: apple46_82704af55c17 X-Filterd-Recvd-Size: 2753 Received: from www262.sakura.ne.jp (www262.sakura.ne.jp [202.181.97.72]) by imf30.hostedemail.com (Postfix) with ESMTP for ; Tue, 28 Apr 2020 23:37:35 +0000 (UTC) Received: from fsav305.sakura.ne.jp (fsav305.sakura.ne.jp [153.120.85.136]) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTP id 03SNbRqx041686; Wed, 29 Apr 2020 08:37:27 +0900 (JST) (envelope-from penguin-kernel@i-love.sakura.ne.jp) Received: from www262.sakura.ne.jp (202.181.97.72) by fsav305.sakura.ne.jp (F-Secure/fsigk_smtp/550/fsav305.sakura.ne.jp); Wed, 29 Apr 2020 08:37:27 +0900 (JST) X-Virus-Status: clean(F-Secure/fsigk_smtp/550/fsav305.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 03SNbMDk041604 (version=TLSv1.2 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 29 Apr 2020 08:37:27 +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: David Rientjes , Andrew Morton Cc: Vlastimil Babka , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mel Gorman References: <20200425172706.26b5011293e8dc77b1dccaf3@linux-foundation.org> <20200427133051.b71f961c1bc53a8e72c4f003@linux-foundation.org> <28e35a8b-400e-9320-5a97-accfccf4b9a8@suse.cz> From: Tetsuo Handa Message-ID: Date: Wed, 29 Apr 2020 08:37:20 +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: 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 2020/04/29 6:48, David Rientjes wrote: > Somewhat related to what I described in the changelog: we lost the "page > allocation stalls" artifacts in the kernel log for 4.15. The commit > description references an asynchronous mechanism for getting this > information; I don't know where this mechanism currently lives. The asynchronous mechanism I meant in that commit is https://lkml.kernel.org/r/c9c87635-6e00-5ce7-b05a-966011c8fe3f@I-love.SAKURA.ne.jp . We are still forced to live in a world where we cannot get a clue for stalled allocations. :-(