From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756482AbZBCBJ6 (ORCPT ); Mon, 2 Feb 2009 20:09:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753078AbZBCBJt (ORCPT ); Mon, 2 Feb 2009 20:09:49 -0500 Received: from smtp102.mail.mud.yahoo.com ([209.191.85.212]:32205 "HELO smtp102.mail.mud.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752822AbZBCBJs convert rfc822-to-8bit (ORCPT ); Mon, 2 Feb 2009 20:09:48 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com.au; h=Received:X-YMail-OSG:X-Yahoo-Newman-Property:From:To:Subject:Date:User-Agent:Cc:References:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-Disposition:Message-Id; b=5i6e/jf4gIXnIcfsMIxq0OTCnrV2BbeZLHu0Ocb2Iqz0Kjih12KwnebGpqnrsoAkw7BeFwwiunUHQqZtb8b8AOWZ4JdEy4DL0jQrPH3BbApNiX6RtEVsd+fDG/+ZkFKP5OHDxkOMZHoUWtjGaAu48/K/gKpwFod78QeJGreypuY= ; X-YMail-OSG: BU3PEUAVM1k1qDpB4IusrO7GII1itcNXZN9dv.G44MWjoSQAKJ9CtCRGmQYbeLeA_z4msO4vdEg27jSY1qfmybCG9l4XKhgYGstwlrtq42C.t1BKFWRPh2WEh4083IcML6ZEJOwjMu2MQ5VZ2IdxGTCO4XopT2W.Nd8IUPosQzIDdPUbTlhcD_jBPpPj9toaWW_IbLtgwf7AQkFP3tCDhH6.UnmNwwWeM7Hl6I0- X-Yahoo-Newman-Property: ymail-3 From: Nick Piggin To: Federico Cuello Subject: Re: sync-Regression in 2.6.28.2? Date: Tue, 3 Feb 2009 12:09:11 +1100 User-Agent: KMail/1.9.51 (KDE/4.0.4; ; ) Cc: linux-kernel@vger.kernel.org, Udo Wolter , cf@charite.de References: <20090127093533.GB7037@charite.de> <497F77F6.40905@lugmen.org.ar> In-Reply-To: <497F77F6.40905@lugmen.org.ar> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8BIT Content-Disposition: inline Message-Id: <200902031209.12615.nickpiggin@yahoo.com.au> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday 28 January 2009 08:09:10 Federico Cuello wrote: > Ralf Hildebrandt escribió: > > I recently installed 2.6.28.2 on our postfix/dovecot-based > > mailboxserver. Previously, 2.6.28 and 2.6.28.1 have been running there > > without a hitch. > > > > Now with 2.6.28.2 I had two major lockups: All writes to the users' > > Maildirs (on ext4) would stall, the load would rise, "sync" would never > > return. > > > > I had to "reboot -f -n" to get the machine back. All hanging processes > > were unkillable, even with kill -9. > > [...] > > The same is happening to me, but I have some logs taken with sysrq. > > Here is my vmstat output: > > procs -----------memory---------- ---swap-- -----io---- -system-- > ----cpu---- > r b swpd free buff cache si so bi bo in cs us sy > id wa > 0 2 99028 46536 26356 1569400 0 0 0 0 1400 437 0 > 3 0 96 > 0 2 99028 46536 26356 1569400 0 0 0 0 1344 355 0 > 6 0 94 > 0 2 99028 46536 26356 1569400 0 0 0 0 1373 387 0 > 0 0 100 > 0 2 99028 46536 26364 1569400 0 0 0 12 1403 384 1 > 0 0 99 > 0 2 99028 46536 26364 1569400 0 0 0 0 1370 378 0 > 0 0 100 > 0 2 99028 46536 26364 1569400 0 0 0 0 1351 346 0 > 0 0 100 > 0 2 99028 46536 26364 1569400 0 0 0 0 1395 412 0 > 0 0 100 > 0 2 99028 46536 26364 1569400 0 0 0 0 1349 332 0 > 0 0 100 > 0 2 99028 46536 26368 1569400 0 0 4 0 1407 387 0 > 0 0 100 > > Notice the 100% iowait. > > I also managed to reproduce it doing a rsync from one partition to a USB > drive. After the lockup I can't read any file from the source partition, > but the other partitions can be accessed normally. Hm, thanks for reporting, can you guys get a sysrq+W trace when the system reaches this state? Thanks, Nick