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=-7.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 87BA0C4338F for ; Tue, 24 Aug 2021 13:02:01 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id F05B66127B for ; Tue, 24 Aug 2021 13:02:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org F05B66127B Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 5B1DD6B006C; Tue, 24 Aug 2021 09:02:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 561896B0071; Tue, 24 Aug 2021 09:02:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 450288D0001; Tue, 24 Aug 2021 09:02:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0003.hostedemail.com [216.40.44.3]) by kanga.kvack.org (Postfix) with ESMTP id 2A2876B006C for ; Tue, 24 Aug 2021 09:02:00 -0400 (EDT) Received: from smtpin07.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id B371B824999B for ; Tue, 24 Aug 2021 13:01:59 +0000 (UTC) X-FDA: 78509986758.07.C4E5A22 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by imf07.hostedemail.com (Postfix) with ESMTP id 5C3DD10001C5 for ; Tue, 24 Aug 2021 13:01:59 +0000 (UTC) Received: from imap1.suse-dmz.suse.de (imap1.suse-dmz.suse.de [192.168.254.73]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 0BBF71FD7E; Tue, 24 Aug 2021 13:01:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1629810118; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=gwH5bbr1n2NZef7C9Wwr43FBq6nYcyZU+iVjKru+rro=; b=Zphsll3UPQ8JZnXmkRt+VpNc5eh3bi0B29d1VWjPCEuibIhHnPN6iZfH5RD5r6ehB311i2 1lmvIysI56YO3YycS2hsn4QTO6ylJyEAVYR38Q/Cqi/qREqfvIwCBG2ypjRSJukQz24vLT 8Lwj7blexzosNMuZrwtcRpBAxnDHAFk= Received: from imap1.suse-dmz.suse.de (imap1.suse-dmz.suse.de [192.168.254.73]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap1.suse-dmz.suse.de (Postfix) with ESMTPS id D679313A55; Tue, 24 Aug 2021 13:01:57 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap1.suse-dmz.suse.de with ESMTPSA id e3FnM8XtJGHfLgAAGKfGzw (envelope-from ); Tue, 24 Aug 2021 13:01:57 +0000 Date: Tue, 24 Aug 2021 15:01:56 +0200 From: Michal =?iso-8859-1?Q?Koutn=FD?= To: Johannes Weiner Cc: Andrew Morton , Leon Yang , Chris Down , Roman Gushchin , Michal Hocko , linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@fb.com Subject: Re: [PATCH] mm: memcontrol: fix occasional OOMs due to proportional memory.low reclaim Message-ID: <20210824130156.GB7802@blackbody.suse.cz> References: <20210817180506.220056-1-hannes@cmpxchg.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=suse.com header.s=susede1 header.b=Zphsll3U; spf=pass (imf07.hostedemail.com: domain of mkoutny@suse.com designates 195.135.220.29 as permitted sender) smtp.mailfrom=mkoutny@suse.com; dmarc=pass (policy=quarantine) header.from=suse.com X-Stat-Signature: iqbr39qp5kgua3w89w6z3op1opdzrcyz X-Rspamd-Queue-Id: 5C3DD10001C5 X-Rspamd-Server: rspam04 X-HE-Tag: 1629810119-95914 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 Mon, Aug 23, 2021 at 01:48:43PM -0400, Johannes Weiner wrote: > Note that this isn't new behavior. Understood, there may be a difference between: a) a cgroup where the protected reserve was detected (this changed), b) a cgroup where the protected memory is reclaimed. > "The number of times the cgroup's memory.low-protected memory was > reclaimed in order to avoid OOM during high memory pressure." Yes, this is what I meant (i.e. events for the case b) above). Michal