diskio / filesystem related deadlock on SMP 6.0-STABLE machine.

Kris Kennaway kris at obsecurity.org
Thu Jan 26 15:46:34 PST 2006


On Thu, Jan 26, 2006 at 06:44:22PM -0500, Kris Kennaway wrote:
> On Thu, Jan 26, 2006 at 06:37:16PM -0500, Mike Jakubik wrote:
> > Kris Kennaway wrote:
> > >On Thu, Jan 26, 2006 at 05:07:56PM +0200, Niki Denev wrote:
> > >  
> > >>On Thursday 26 January 2006 10:40, Niki Denev wrote:
> > >>    
> > >>[...]
> > >>
> > >>After i disabled option QUOTA in both my default kernel config
> > >>and the one i compiled with the debugging options i was unable
> > >>to reproduce the deadlock again. (i hope it stays that way :) )
> > >>This, together with the report in my previous post probably point
> > >>that the problem is in the QUOTA support.
> > >>    
> > >
> > >Actually, I think this is known.
> > >
> > >Kris
> > >  
> > 
> > Well thats good to know, i was planning on upgrading a production box 
> > from 5 to 6, its SMP and uses QUOTA. How did 6 get released when QUOTA 
> > was known to cause deadlocks?

FYI, you can probably work around this by setting debug.mpsafevfs=0.
Of course, you'll lose the filesystem performance benefits.

Kris
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