Re: Regressionhung task during raid rebuild 2.6.33 rc5 was: Re:2.6.33RC3 hung task - jbd2/dm-1-8 (during raid rebuild)

[Michael Breuer]

On 1/30/2010 2:57 PM, Rafael J. Wysocki wrote:
> 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
>    
Yes - although the behavior is different on rc5 vs. rc3. I think it's 
the same.
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