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SubjectRe: INFO: possible circular locking dependency detected
On Thu, Jul 14, 2011 at 03:38:28PM -0400, Dave Jones wrote:
> On Thu, Jul 14, 2011 at 12:34:12PM -0700, Paul E. McKenney wrote:
>
> > Thank you -- you were indeed running with CONFIG_PREEMPT and
> > CONFIG_RCU_BOOST, which would be the case for the bug that Steven Rostedt
> > found. On reproducing, yes, it could be a bit tough, as the race window
> > is rather narrow. I could probably add delays to force the situation htat
> > Steven found, but it would be hard to prove that this is your situation.
> >
> > Dave, was your lockdep splat also with CONFIG_PREEMPT and
> > CONFIG_RCU_BOOST?
>
> yeah. which might explain why I haven't seen it since. (I usually have it
> disabled, but turn it on occasionally for a 'lets see what breaks' test)

OK, thanks for the info. For the time being, I will assume that you
were seeing this same bug.

Thanx, Paul


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