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 :/
