Re: [PATCH v8 11/14] lockdep: Apply crossrelease to PG_locked locks

Peter Zijlstra
2017-08-10T09:25:30Z

On Thu, Aug 10, 2017 at 10:35:02AM +0900, Byungchul Park wrote:
> On Mon, Aug 07, 2017 at 04:12:58PM +0900, Byungchul Park wrote:
> > Although lock_page() and its family can cause deadlock, the lock
> > correctness validator could not be applied to them until now, becasue
> > things like unlock_page() might be called in a different context from
> > the acquisition context, which violates lockdep's assumption.
> >
> > Thanks to CONFIG_LOCKDEP_CROSSRELEASE, we can now apply the lockdep
> > detector to page locks. Applied it.
>
> Is there any reason excluding applying it into PG_locked?

Wanted to start small..