* Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> On Sun, Mar 27, 2016 at 05:03:44AM -0700, Linus Torvalds wrote:
> > Anyway, I don't think that DEBUG_LOCKS_WARN_ON() in
> >
> > kernel/locking/lockdep.c:2017 __lock_acquire
> >
> > would be an ext4 issue, it looks more like an internal lockdep issue.
> >
> > Adding in the lockdep people, who will set me right.
>
> You are right; this is lockdep running into a hash collision; which is a new
> DEBUG_LOCKDEP test. See 9e4e7554e755 ("locking/lockdep: Detect chain_key
> collisions").
I've Cc:-ed Alfredo Alvarez Fernandez who added that test.
Thanks,
Ingo
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