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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,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 CE2F0C33CA7 for ; Sun, 12 Jan 2020 00:07:36 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 59DF620848 for ; Sun, 12 Jan 2020 00:07:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=colorremedies-com.20150623.gappssmtp.com header.i=@colorremedies-com.20150623.gappssmtp.com header.b="QZV0YiSs" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 59DF620848 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=colorremedies.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id B6ED58E0005; Sat, 11 Jan 2020 19:07:35 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id B1F4F8E0001; Sat, 11 Jan 2020 19:07:35 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A35558E0005; Sat, 11 Jan 2020 19:07:35 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 8CDE08E0001 for ; Sat, 11 Jan 2020 19:07:35 -0500 (EST) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with SMTP id 1F33E4DB7 for ; Sun, 12 Jan 2020 00:07:35 +0000 (UTC) X-FDA: 76367043270.18.step15_5f464d21e8505 X-HE-Tag: step15_5f464d21e8505 X-Filterd-Recvd-Size: 3933 Received: from mail-wm1-f66.google.com (mail-wm1-f66.google.com [209.85.128.66]) by imf28.hostedemail.com (Postfix) with ESMTP for ; Sun, 12 Jan 2020 00:07:34 +0000 (UTC) Received: by mail-wm1-f66.google.com with SMTP id p17so5843722wmb.0 for ; Sat, 11 Jan 2020 16:07:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=colorremedies-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=hz+Qlf0i6Ut1wJ5WaEVmw5rmYkX2lc5wD0bJf9HX1wE=; b=QZV0YiSs/NkgBSSyZz3DLHf7JCJvoE+l0xECE78Jg6KtWoF1ciOvETnHa3yCOcZ6HY dOY5FNEWYZlA45FI8e5fU/X4oC50zl+J+HKSGg0omVPYYT4ZwDCQkAbn6CUlP1ZsYi64 bMijgAXN8Q6h6CRDYF+pQ1T5SqIhFmQX8UxBleMQqqX616i3l3g8IXQVm/M47voA0uzA t5/FlyP+g5nzFWbGA8oumCXoceJ5B5RAIPVDS9nQUNdKDaALoHOAlQm+7/QmZG6hCQse M9dHQh9yP2RqIhmVLiSqOR8WUpN+9chEUGvzZgaLYAEyUfIgjbLU8WMtECOARQUlGflu 9iHA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=hz+Qlf0i6Ut1wJ5WaEVmw5rmYkX2lc5wD0bJf9HX1wE=; b=gRiXl1Xq49Np5U9Oa1sYwxyP7wYTrWD+o38QmDYU2iyt25XIDfRDbovvElwFfRdLyx bOh0VCX5xyOhWduihG8jPFQpMRFqcIngY/IK5lT2ZF2OeRoMZttQXUV/ZIx1TbydQFjL 4wcvyNBk5QzM76UO7OoX6W89lhnKwPma6HYkekQ02Tv2vT9cXNwVRNUBQFyaSAmSnknC nx6PKCSYSNWpHIxOR58O+Z9dFAxaoCb1oUSzd4HOrtuzXFYa1IYBcxfa51mjrEi+vn9Q Xg2HwyOD2QwM5LWTZLDoPlaQj4qD/FxOqMeppAbv17OLQi8E9HXYaAtxNMCFZwDDkdg+ +5eg== X-Gm-Message-State: APjAAAUGGyn9/BNK73bJAE/rd9agsuL9T7NuKMtSwOPF/i0ddIFNK+vp 6QKBzq6/XEyW7sI2Sxcy07XEtv/vB5O6v7EcIUbfug== X-Google-Smtp-Source: APXvYqws86sRzh2uZK3qcT0kCO70YATaCXfv4cFLVz15PWPrlZopDULHo/nibAKwGAhuKRa7xF0nTA4QWo4Yi9yJ5QQ= X-Received: by 2002:a1c:770e:: with SMTP id t14mr12761641wmi.101.1578787653630; Sat, 11 Jan 2020 16:07:33 -0800 (PST) MIME-Version: 1.0 References: <20200107205824.GM32178@dhcp22.suse.cz> <20200108092501.GO32178@dhcp22.suse.cz> <20200109115147.GP4951@dhcp22.suse.cz> <20200109115327.GQ4951@dhcp22.suse.cz> <20200110110739.GD29802@dhcp22.suse.cz> In-Reply-To: <20200110110739.GD29802@dhcp22.suse.cz> From: Chris Murphy Date: Sat, 11 Jan 2020 17:07:17 -0700 Message-ID: Subject: Re: user space unresponsive, followup: lsf/mm congestion To: Michal Hocko Cc: Chris Murphy , linux-mm@kvack.org Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.002262, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Jan 10, 2020 at 4:07 AM Michal Hocko wrote: > > So you have redirected the output (stdout) to a file. This is less > effective than using a file directly because the progy makes sure to > preallocate and mlock the output file data as well. Anyway, let's have a > look what you managed to gather [chris@fmac tmp]$ /home/chris/read_vmstat readvmstatwkgtk.out file:readvmstatwkgtk.out timeout:1.0s buffer_size:10485760 mlockall. Continuing anyway: Cannot allocate memory Estimated 3744 entries fit to the buffer ^C This is with vm.swappiness=100, is also ~12 minutes. Responsiveness appears unchanged. File is attached here: https://bugzilla.kernel.org/show_bug.cgi?id=206117#c8 More curious is I get a call trace I haven't seen before when I try to login to this hung system, via ssh. That's in https://bugzilla.kernel.org/show_bug.cgi?id=206117#c7 -- Chris Murphy