From owner-freebsd-current@FreeBSD.ORG Wed Oct 26 16:13:43 2005 Return-Path: X-Original-To: current@FreeBSD.org Delivered-To: freebsd-current@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9204716A41F for ; Wed, 26 Oct 2005 16:13:43 +0000 (GMT) (envelope-from gkozyrev@ukr.net) Received: from computer.ukrsat.com (computer.ukrsat.com [212.35.160.23]) by mx1.FreeBSD.org (Postfix) with ESMTP id DA52443D60 for ; Wed, 26 Oct 2005 16:13:41 +0000 (GMT) (envelope-from gkozyrev@ukr.net) Received: from gleb.kozyrev.name (juli.slnet.kiev.ua [195.49.149.86]) by computer.ukrsat.com (8.12.8/8.12.8) with SMTP id j9PHHmDc005879; Tue, 25 Oct 2005 20:17:53 +0300 Received: from Gleb ([127.0.0.1]) by Gleb (192.168.48.1) with smtp ; Tue, 25 Oct 2005 20:30:02 +0300 Message-ID: <000a01c5d989$ba089a00$0130a8c0@Gleb> From: "Gleb Kozyrev" To: "Kris Kennaway" , References: <20051025155930.GF93337@xor.obsecurity.org> Date: Tue, 25 Oct 2005 20:29:59 +0300 MIME-Version: 1.0 Content-Type: text/plain; charset="koi8-u" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 FL-Build: Fidolook 2002 (SL) 6.0.2800.94 - 5/4/2005 11:39:16 Cc: Subject: Re: syncer going nuts on 6.0 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Oct 2005 16:13:43 -0000 Kris Kennaway wrote to on Tue, 25 Oct 2005 11:59:33 -0400: KK> I have 3 UP 6.0 machines that are currently stuck using 100-epsilon% KK> of CPU in the syncer: KK> last pid: 17621; load averages: 9.02, 7.21, 4.82 KK> up 3+18:15:31 +08:49:50 KK> 73 processes: 2 running, 47 sleeping, 24 waiting KK> CPU states: 0.0% user, 0.0% nice, 100% system, 0.0% interrupt, 0.0% idle KK> Mem: 27M Active, 149M Inact, 137M Wired, 4K Cache, 109M Buf, 684M Free KK> Swap: 2048M Total, 8K Used, 2048M Free KK> PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND KK> 38 root 1 -4 0 0K 8K getblk 180:21 431.30% syncer KK> 17474 root 1 -4 0 1928K 1428K getblk 1:13 28.71% rm KK> 11 root 1 171 52 0K 8K RUN 20.2H 8.94% idle KK> rm -rf is just removing a single ufs directory tree, but it's taking KK> *much* longer than it should be (order of 5 minutes instead of 30 KK> seconds it took for the other 25 machines), and the machine was KK> extremely unresponsive in the meantime (response times of 30 seconds KK> to run commands like top). WITNESS is on, but it's also on on the KK> other 25 machines that aren't seeing a problem under what should be KK> analogous loads. I've seen the same problem and it seems to be related with filesystem snapshots. -- With best regards, Gleb Kozyrev.