Re: + shmem-fix-faulting-into-a-hole-while-its-punched-take-2.patch added to -mm tree

From: Peter Zijlstra
Date: Fri Jul 11 2014 - 04:25:16 EST

On Thu, Jul 10, 2014 at 03:02:29PM -0400, Sasha Levin wrote:
> What if we move lockdep's acquisition point to after it actually got the
> lock?

NAK, you want to do deadlock detection _before_ you're stuck in a

> We'd miss deadlocks, but we don't care about them right now. Anyways, doesn't
> lockdep have anything built in to allow us to separate between locks which
> we attempt to acquire and locks that are actually acquired?
> (cc PeterZ)
> We can treat locks that are in the process of being acquired the same as
> acquired locks to avoid races, but when we print something out it would
> be nice to have annotation of the read state of the lock.

I'm missing the problem here I think.
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