* Peter Zijlstra <pet...@infradead.org> wrote:
> On Fri, Apr 12, 2019 at 09:02:09AM +0200, Ingo Molnar wrote:
> >
> > * Waiman Long <long...@redhat.com> wrote:
> >
> > > On 04/11/2019 04:12 AM, Peter Zijlstra wrote:
> > > > On Wed, Apr 10, 2019 at 02:42:19PM -0400, Waiman Long wrote:
> > > >> The owner field in the rw_semaphore structure is used primarily for
> > > >> optimistic spinning. However, identifying the rwsem owner can also be
> > > >> helpful in debugging as well as tracing locking related issues when
> > > >> analyzing crash dump. The owner field may also store state information
> > > >> that can be important to the operation of the rwsem.
> > > >>
> > > >> So the owner field is now made a permanent member of the rw_semaphore
> > > >> structure irrespective of CONFIG_RWSEM_SPIN_ON_OWNER.
> > > > sem->owner is still initialized under CONFIG_RWSEM_SPIN_ON_OWNER.
> > >
> > > Oh, you are right. I missed that part. I will fix it in the next version.
> >
> > Could you please post the next series against tip:WIP.locking/core, which
> > is already being dogfood-ed in -tip and which I'm running on my desktop?
> > I'll backmerge any fixes as needed/requested.
>
> Urgh, please no, that's going to be hell to review :/
Ok - full patches then. I'll handle the fallout.
Thanks,
Ingo
