From owner-freebsd-hackers@freebsd.org Sat Aug 12 05:17:57 2017 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id DB961D939ED for ; Sat, 12 Aug 2017 05:17:57 +0000 (UTC) (envelope-from list@execve.net) Received: from lax012.relay.arandomserver.com (lax012.relay.arandomserver.com [198.252.106.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id AEC2C7437B for ; Sat, 12 Aug 2017 05:17:57 +0000 (UTC) (envelope-from list@execve.net) Received: from sng001.hawkhost.com ([119.81.196.36]) by se003.arandomserver.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1dgOo2-0001hU-74 for freebsd-hackers@freebsd.org; Sat, 12 Aug 2017 00:17:56 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=execve.net; s=default; h=Content-Type:Cc:To:Subject:Message-ID:Date:From:References: In-Reply-To:MIME-Version:Sender:Reply-To:Content-Transfer-Encoding:Content-ID :Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To: Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe :List-Post:List-Owner:List-Archive; bh=lTaEYCbwlprnXImDTDsLhrBgBBsrgr3CBBPwurTv+PM=; b=C+8/t4xVsw39zKpNf4LDZibZYT TlMrx61JkqEK/BUp8vOIJL8eaPGEmLXopYetUtFgRrGFYKQp7e1hLv5yGyqwqPvZ9MJILGdtgDYYR Vn/ESEEfUmPqyMVssGgtUoAYF; Received: from mail-yw0-f170.google.com ([209.85.161.170]:34727) by sng001.hawkhost.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.89) (envelope-from ) id 1dgOnx-004FO7-Go for freebsd-hackers@freebsd.org; Sat, 12 Aug 2017 13:17:45 +0800 Received: by mail-yw0-f170.google.com with SMTP id s143so32650112ywg.1 for ; Fri, 11 Aug 2017 22:17:45 -0700 (PDT) X-Gm-Message-State: AHYfb5hYxmyq+5+clMM50EPfCax1DYmJby9DiJ3Yqzj7tFDJjAkjfWvJ ws4uHih4Wd/4zW76uJ6GR6RC1Z/7zQ== X-Received: by 10.37.53.6 with SMTP id c6mr326127yba.54.1502515063771; Fri, 11 Aug 2017 22:17:43 -0700 (PDT) MIME-Version: 1.0 Received: by 10.37.20.135 with HTTP; Fri, 11 Aug 2017 22:17:43 -0700 (PDT) In-Reply-To: References: <598ADB65.8060701@grosbein.net> From: Gautam Date: Sat, 12 Aug 2017 10:47:43 +0530 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: Freebsd 11.0 - system freeze on intensive I/O To: freebsd-hackers Cc: "gautam@execve.net" X-Originating-IP: 119.81.196.36 X-SpamExperts-Domain: sng001.hawkhost.com X-SpamExperts-Username: relay Authentication-Results: arandomserver.com; auth=pass (login) smtp.auth=relay@sng001.hawkhost.com X-SpamExperts-Outgoing-Class: ham X-SpamExperts-Outgoing-Evidence: Combined (0.05) X-Recommended-Action: accept X-Filter-ID: PqwsvolAWURa0gwxuN3S5YEa3T7JuZT23fGO2rGt3ZiEh/Q2y0dK8jSMLTE55fwqH0Nprjby6XDb qzVlIOQ03kAwPN4M+BNtq20Hh3O6Az9ismS84NPFas3IWADbmzJ9CZryIsNFvaBrlzs70sT7iKmx j3Zz/WM/IwRyPjIHIwDYsQbJYJbL3vFbmnz2PBd2yihJNBzs+iyvG5OI26kP0R5e973vehgRRMJd d1x498R9ApQmzlXa0qe0Fk7psoi5GzcWMr0czofRVh8rMXrt/SyLxLEJIkbWABkyXJwBVLal3W+/ PI81P534n3yak4n7EfJL2hMI4yCDSSr/HxDyN5bD8YyxjFtJAz2loLb4we0tFPPhpWPZ07PAOr0y wYIXuCj9wj08m7429e2ZOl/ZXvNM2/zURZVxzSV/eszOttj6AVIvY+ILsI7br1ka/ZVM5IUy3dIZ HZiQN/y5++vLOhnUf0KG89mNZvFB5dAV53iVu34H+eqH7iWBpUrKGrffGcXZKnwjnRMG9jJ/knTt +XiA50wwIMuM3BDtnoPm4HpIizaH26GaoEDwTtnQE6q4ZRNP3CPS3YZT5ODGEA+uOpLZY+4z/dwR ocCZGdc1cl9f9x/pKLS918QV+MmO1bAAEgjXIny51RJ3yyIOVX71wEukYspuIwswojsoiyB8OuXo nV+E7OMXRvgtdyMlnmWi9uF4/xGeHumbSXx1nykjkg3q5Go+y6UPrDLg9O+nbQFabxWNMr4EFN3D uwz3mGwtQnTIgDfxZ2/WGqYvyOVteVOdo6Dvr8fbMJVJ9/erL6/4IvMfhB2h/z0m0D607pH+pWX8 JH76UCDHe+VBXhtjrZr9RUQzcLUz45TvUuLctG5L8ZHLV0zHQOMuxVjpDkV6 X-Report-Abuse-To: spam@se001.arandomserver.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 12 Aug 2017 05:17:58 -0000 Hi, On Wed, Aug 9, 2017 at 10:23 PM, Gautam wrote: > Hi, > > I just want to comment, that when I tested it there > was absolutely no need for any swap usage. I tried the test on a laptop > with 8GB RAM and > did it from the console mode. But it does seem that there might be some > request (read/write) to swap which > =E2=80=8Bcauses a lock up to the system.=E2=80=8B > > =E2=80=8BOne update on this one. I installed a custom stable/11 kernel an= d world (sched =3D 4BSD was the only change), and the problem is no longer seen. From my untrained eyes, it looks like some kind of swap request starvation causing a hang when ULE is in use.=E2=80=8B =E2=80=8BThanks, Gautam =E2=80=8B