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=-1.0 required=3.0 tests=MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 648F6C2D0DB for ; Fri, 24 Jan 2020 10:28:15 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2B9A720708 for ; Fri, 24 Jan 2020 10:28:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2B9A720708 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 A1C996B0003; Fri, 24 Jan 2020 05:28:14 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 9A61A6B0005; Fri, 24 Jan 2020 05:28:14 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 86DBC6B0006; Fri, 24 Jan 2020 05:28:14 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0062.hostedemail.com [216.40.44.62]) by kanga.kvack.org (Postfix) with ESMTP id 6C6116B0003 for ; Fri, 24 Jan 2020 05:28:14 -0500 (EST) Received: from smtpin02.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with SMTP id 2B6703489 for ; Fri, 24 Jan 2020 10:28:14 +0000 (UTC) X-FDA: 76412152908.02.egg26_64f81bf92b036 X-HE-Tag: egg26_64f81bf92b036 X-Filterd-Recvd-Size: 2996 Received: from mail-wr1-f46.google.com (mail-wr1-f46.google.com [209.85.221.46]) by imf30.hostedemail.com (Postfix) with ESMTP for ; Fri, 24 Jan 2020 10:28:13 +0000 (UTC) Received: by mail-wr1-f46.google.com with SMTP id t2so1345425wrr.1 for ; Fri, 24 Jan 2020 02:28:13 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=0/J6LsPlF+gD0bzYex63aRoGsXJ67684oA6BPUlcBdQ=; b=qO2Jhvy7DtKM2Wo0JAT8lJrn50TUu5ZEU2zHWa/EkkaRS4+6ZF+xmMARBMNuVkfKkk Yp70OEb7dYG4dT7oyjcP0xcUOT9heK1OoQY9AdyiBGS2+Xb9wkWnsLq7rNVjrlSNm3rv aC50m5a9+NxYEShnrYhD3a9iNnJwY8zwUA6KpDz745eFgG4DHA71jyKQ5AhhcyRxBp8N jnWICynR64lND6lWB+kxUWbxJ2AuBXDbROb+ZAxm29mDEAuvQRtJ7sq6B/5KAclWKxrZ IeqJ3QFbRxlzJEpCGWnrDxC+3qLn5H2pcr0w2Ow68n9m/b7xy7ZmPpL22x6fRlJmMMoj 6E1Q== X-Gm-Message-State: APjAAAU+/s/qI7agFQmCa1ytR2SeX4BpxkxeGPArX+Su1sPt73xtTRaN 0fj5Vj2DqF67xxchXTHODPc= X-Google-Smtp-Source: APXvYqwRD1sh0wmRUbX+/Xhs6RHNWqOr8H4DXdlbWnsuAgLk30JG4O2HWLm8dZ0NmP7yyhufgd5g+A== X-Received: by 2002:adf:f288:: with SMTP id k8mr3691529wro.301.1579861692466; Fri, 24 Jan 2020 02:28:12 -0800 (PST) Received: from localhost (prg-ext-pat.suse.com. [213.151.95.130]) by smtp.gmail.com with ESMTPSA id b17sm6938327wrx.15.2020.01.24.02.28.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Jan 2020 02:28:11 -0800 (PST) Date: Fri, 24 Jan 2020 11:28:10 +0100 From: Michal Hocko To: Chris Edwards Cc: "linux-mm@kvack.org" , Johannes Weiner Subject: Re: Paging out when free memory is low but not exhausted (and available memory remains high) Message-ID: <20200124102810.GQ29276@dhcp22.suse.cz> References: <20200123123127.GK29276@dhcp22.suse.cz> <1579844599463.32567@otago.ac.nz> <20200124100423.GP29276@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200124100423.GP29276@dhcp22.suse.cz> 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 Fri 24-01-20 11:04:25, Michal Hocko wrote: [...] > $ awk '{diff=$1-prev; if (prev&&diff) printf "%d %d %d\n", NR, $1, diff; prev=$1}' pswpout > 30 392136 2000 > 31 395513 3377 > 32 399132 3619 > 33 403101 3969 > 34 407211 4110 > 35 410812 3601 > 36 414120 3308 > 37 418119 3999 > 38 422116 3997 > 39 424154 2038 > 40 428110 3956 > > So the swappout started around 18:25:00 Sorry, this should have been 18:25:29 $ sed '1,29d' vmstat-log.txt | head -n1 time 18:25:29 I hope I haven't misprocessed other data but a quick check suggests that s ok. -- Michal Hocko SUSE Labs