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=-2.5 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 ADE7CC4740A for ; Mon, 9 Sep 2019 11:49:47 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 85F4A21924 for ; Mon, 9 Sep 2019 11:49:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 85F4A21924 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.cz Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2D1266B0005; Mon, 9 Sep 2019 07:49:47 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2A8836B000A; Mon, 9 Sep 2019 07:49:47 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1BEDB6B000C; Mon, 9 Sep 2019 07:49:47 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0181.hostedemail.com [216.40.44.181]) by kanga.kvack.org (Postfix) with ESMTP id ED8A56B0005 for ; Mon, 9 Sep 2019 07:49:46 -0400 (EDT) Received: from smtpin10.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with SMTP id 888EA6D8A for ; Mon, 9 Sep 2019 11:49:46 +0000 (UTC) X-FDA: 75915212772.10.color69_72617256c144f X-HE-Tag: color69_72617256c144f X-Filterd-Recvd-Size: 2175 Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) by imf33.hostedemail.com (Postfix) with ESMTP for ; Mon, 9 Sep 2019 11:49:45 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 5EF4CAD44; Mon, 9 Sep 2019 11:49:44 +0000 (UTC) Subject: Re: lot of MemAvailable but falling cache and raising PSI To: Stefan Priebe - Profihost AG , Michal Hocko Cc: "linux-mm@kvack.org" , l.roehrs@profihost.ag, cgroups@vger.kernel.org, Johannes Weiner References: <4b4ba042-3741-7b16-2292-198c569da2aa@profihost.ag> <20190905114022.GH3838@dhcp22.suse.cz> <7a3d23f2-b5fe-b4c0-41cd-e79070637bd9@profihost.ag> <20190909082732.GC27159@dhcp22.suse.cz> <1d9ee19a-98c9-cd78-1e5b-21d9d6e36792@profihost.ag> From: Vlastimil Babka Message-ID: Date: Mon, 9 Sep 2019 13:49:43 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <1d9ee19a-98c9-cd78-1e5b-21d9d6e36792@profihost.ag> Content-Type: text/plain; charset=utf-8; format=flowed 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 9/9/19 10:54 AM, Stefan Priebe - Profihost AG wrote: >> Do you have more snapshots of /proc/vmstat as suggested by Vlastimil and >> me earlier in this thread? Seeing the overall progress would tell us >> much more than before and after. Or have I missed this data? > > I needed to wait until today to grab again such a situation but from > what i know it is very clear that MemFree is low and than the kernel > starts to drop the chaches. > > Attached you'll find two log files. Thanks, what about my other requests/suggestions from earlier? 1. How does /proc/pagetypeinfo look like? 2. Could you also try if the bad trend stops after you execute: echo never > /sys/kernel/mm/transparent_hugepage/defrag and report the result? Thanks