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SubjectRe: Oops when accessing /proc/lockdep_chains
On Wed, Aug 06, 2008 at 02:41:34PM +0200, Eric Sesterhenn wrote:
> * Eric Sesterhenn (snakebyte@gmx.de) wrote:
> > hi,
> >
> > with current -git (aka -rc2) i sometime get the following oops
> > when doing a cat /proc/lockdep_chains
> > The other /proc/lockdep* files dont cause any errors
> >
> > I dont get it after a fresh reboot :| But was able to reproduce it when
> > running my testscripts, I'll try to narrow it down.
>
> I can easily reproduce this with
>
> modprobe rcutorture; sleep 10s; rmmod rcutorture; cat
> /proc/lockdep_chains > /dev/null

Indeed, it oopses after any module which creates a lock is unloaded.
I'll send a patch for this shortly.

Rabin


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