From: Vladislav Bolkhovitin Subject: Re: Crash after umount'ing a disconnected disk and JBD: recovery failed (Re: extfs reliability) Date: Mon, 09 Aug 2010 22:45:52 +0400 Message-ID: <4C604CE0.9040808@vlnb.net> References: <20100804180325.GL9453@thunk.org> <4C5B1137.1070001@vlnb.net> <20100805211758.GA12358@thunk.org> <4C5C0CE2.7030009@vlnb.net> <20100806181042.GB24583@thunk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: linux-ext4@vger.kernel.org To: Ted Ts'o Return-path: Received: from moutng.kundenserver.de ([212.227.17.8]:49153 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754351Ab0HISpt (ORCPT ); Mon, 9 Aug 2010 14:45:49 -0400 In-Reply-To: <20100806181042.GB24583@thunk.org> Sender: linux-ext4-owner@vger.kernel.org List-ID: Ted Ts'o, on 08/06/2010 10:10 PM wrote: > On Fri, Aug 06, 2010 at 05:23:46PM +0400, Vladislav Bolkhovitin wrote: >>>> >>>> 1. A bunch of detected hung tasks with call traces. >>>> >>> >>> Do you eventually get file >>> system I/O errors that abort the journal transaction? You should... >> >> Yes, as you can see in the previously attached log. > > OK, so what are you complaining about? This is *normal*. You can > change how long the kernel will wait before printing the warnings, by > adjusting /proc/sys/kernel/hung_task_timeout_secs, but the fact that > you're getting the detected hung tasks is the system performing as > designed. Well, I'm not complaining, I'm reporting. I can't say where is the problem. And I really would *not* say that activation of the hung tasks detector is normal. A correct timeout should be set by default, not after manual user intervention. >>>> 2. "JBD: recovery failed" I reported before. >>> >>> I've searched my mail archives, and I'm not sure what you're talking >>> about here. Maybe this was in an e-mail that you sent that perhaps >>> got lost? >> >> It's next to the message on which you originally replied. It was >> about ext3, but this time I saw it with ext4. > > Can you resend, and with a new and specific subject line that is > helpful for finding it, and just that one message? See http://lkml.org/lkml/2010/7/29/222 and http://lkml.org/lkml/2010/7/29/325. Vlad