From owner-freebsd-stable@freebsd.org Mon Feb 12 05:19:38 2018 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 3898AF19295 for ; Mon, 12 Feb 2018 05:19:38 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [78.47.246.247]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id B7E657F818 for ; Mon, 12 Feb 2018 05:19:37 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (root@eg.sd.rdtc.ru [62.231.161.221] (may be forged)) by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id w1C5JIfO023431 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 12 Feb 2018 06:19:19 +0100 (CET) (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: ask@develooper.com Received: from [10.58.0.4] ([10.58.0.4]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTPS id w1C5JDTL021293 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Mon, 12 Feb 2018 12:19:13 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: FreeBSD on 64MB memory To: =?UTF-8?Q?Ask_Bj=c3=b8rn_Hansen?= , freebsd-stable@freebsd.org References: <5FB97479-C49D-4C6E-8416-015ECA656C14@develooper.com> From: Eugene Grosbein Message-ID: <5A8123CE.9050609@grosbein.net> Date: Mon, 12 Feb 2018 12:19:10 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.7.2 MIME-Version: 1.0 In-Reply-To: <5FB97479-C49D-4C6E-8416-015ECA656C14@develooper.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=2.2 required=5.0 tests=BAYES_00, LOCAL_FROM, RDNS_NONE autolearn=no autolearn_force=no version=3.4.1 X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * 2.6 LOCAL_FROM From my domains * 1.9 RDNS_NONE Delivered to internal network by a host with no rDNS X-Spam-Level: ** X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on hz.grosbein.net X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 12 Feb 2018 05:19:38 -0000 12.02.2018 11:56, Ask Bjørn Hansen пишет: > Hi, > > I have an old Soekris system with 64MB memory that I upgraded from 10.3 to 11.1 recently. Since then it’s started hanging every few days. > > Today I happened to have a “top” instance running on the serial console. The system is minimally responsive to the network (ICMP and CARP are working, but no services). > >>From the top output it’s not clear what resource it’s out of. I suspect it is out of many types of kernel memory including mbuf clusters, hence no working TCP/UDP but ICMP works. > There’s no swap configured, but that what it looks like it’s trying to do? > > The ‘pf purge’ process is suspicious. There are no pf rules configured on the system (it should be all disabled). > > Any suggestions? (Other than “seriously … 64MB memory?!”). Please show output of commands: grep memory /var/run/dmesg.boot top -ores -d1 sysctl kern.ipc.nmbclusters It would be also very useful to obtain output of "vmstat -z" in a moment of breakage.