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SubjectRe: [RFC][PATCH] lockdep: Print a nice description of an irq locking issue
On Tue, 29 Mar 2011, Steven Rostedt wrote:
> other info that might help us debug this:
>
> Chain exists of:
> &rq->lock --> lockA --> lockC
>
> Possible interrupt unsafe locking scenario:
>
> CPU0 CPU1
> ---- ----
> lock(lockC);
> local_irq_disable();
> lock(&rq->lock);
> lock(lockA);
> <Interrupt>
> lock(&rq->lock)
>
> *** DEADLOCK ***

Cool stuff. I always have to twist my brain around those splats as
well :)

Thanks,

tglx


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