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SubjectRe: [RFC/PATCH] debug workqueue deadlocks with lockdep
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On Wed, 2007-07-04 at 14:21 +0200, Ingo Molnar wrote:

> well, in this case the lock/unlock should nest perfectly (i.e. it should
> always be balanced perfectly), so indeed calling with nested==1 leads to
> stricter checking.
>
> non-nested unlocks occur when people do stuff like:
>
> spin_lock(&lock1);
> spin_lock(&lock2);
> spin_unlock(&lock1);
> spin_unlock(&lock2);
>
> the first unlock is not 'nested perfectly'. Now for the workqueue
> dep_map this shouldnt be a legal combination, right?

I don't think so, will change to use nested==1.

johannes
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