From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Michael Breuer <mbreuer@majjas.com>
Subject: Re: Regressionhung task during raid rebuild 2.6.33 rc5 was: Re: 2.6.33RC3 hung task - jbd2/dm-1-8 (during raid rebuild)
Date: Sat, 30 Jan 2010 20:57:59 +0100
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On Saturday 30 January 2010, Michael Breuer wrote:
> On 1/10/2010 4:47 PM, Michael Breuer wrote:
> > System crashed (watchdog reset).
> >
> > Was doing a raid rebuild at the time (raid6).
> >
> > I typed, 'yumdownloader --source virtlib' ... system froze, then 
> > rebooted on the watchdog reset.
> >
> > I've attached the log extract from the event as well as dmesg.
> >
> >
> Hit this again - system doesn't crash now - just get the hung task 
> warning (log extract attached). System seems to keep running (albeit the 
> rebuild is incredibly slow on 2.6.33 rc5 - approx 6500K/sec vs. about 
> 80,000K/sec on 2.6.32.4.
> 
> Looks like it may be triggered by disk io during the rebuild. This time 
> I had typed, "sync." "sync" hung for a long while but did eventually 
> complete.

Is this the bug tracked as http://bugzilla.kernel.org/show_bug.cgi?id=15125 ?

Rafael
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