[Unionfs] Panic in unionfs 2.2.4

[Bob Gilligan]

----- "Erez Zadok" <ezk at cs.sunysb.edu> wrote:
> In message
> <20286507.735771206579536200.JavaMail.root at tahiti.vyatta.com>, Bob
> Gilligan writes:
> [...]
> > And I see the panic too in unionfs-2.3.1 running on our 2.6.23
> kernel.  It is the same panic signature as before:  BUG at
> include/linux/dcache.h:322
> > 
> > I've filed a bug report on the problem:
> > 
> > https://bugzilla.filesystems.org/show_bug.cgi?id=611
> > 
> > Bob.
> 
> Bob, below is a fix to your bug #611.  Please verify it on your
> setup.
> Thanks for the step-by-step tickle-the-bug script: it was very
> helpful.
> 
> Lucas, and others who've seen similar bugs, please let me know if the
> small
> patch below fixes your oopses or not.
> 
> Thanks,
> Erez.
> 

That patch seems to have done the trick!  I tried the sequence of shell commands that previously triggered the problem in our 2.6.23 kernel and got no panic.  I also tried the sequence of commands in the Vyatta config system (which uses unionfs) that tickled the problem, and can't reproduce the panic that way either  Thanks for the fix!

Bob.