Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754940AbZA0VQa (ORCPT ); Tue, 27 Jan 2009 16:16:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753288AbZA0VPz (ORCPT ); Tue, 27 Jan 2009 16:15:55 -0500 Received: from smtp-05.arnet.com.ar ([200.45.191.5]:56028 "HELO smtp-05.arnet.com.ar" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753059AbZA0VPy (ORCPT ); Tue, 27 Jan 2009 16:15:54 -0500 X-Greylist: delayed 398 seconds by postgrey-1.27 at vger.kernel.org; Tue, 27 Jan 2009 16:15:53 EST Message-ID: <497F77F6.40905@lugmen.org.ar> Date: Tue, 27 Jan 2009 19:09:10 -0200 From: Federico Cuello User-Agent: Thunderbird 2.0.0.19 (X11/20090101) MIME-Version: 1.0 To: linux-kernel@vger.kernel.org, Udo Wolter , cf@charite.de Subject: Re: sync-Regression in 2.6.28.2? References: <20090127093533.GB7037@charite.de> In-Reply-To: <20090127093533.GB7037@charite.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1893 Lines: 56 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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/