On Thu, Jun 08, 2017 at 11:18:13PM +1000, Nicholas Piggin wrote:
> I guess I see your point... okay, will constrain the comment to powerpc
> context switch and primitives code. Any fundamental change to such
> scheduler barriers I guess would require at least a glance over arch
> switch code :)
Ju
On Thu, 8 Jun 2017 14:45:40 +0200
Peter Zijlstra wrote:
> On Thu, Jun 08, 2017 at 08:00:15PM +1000, Nicholas Piggin wrote:
>
> > I have those, I just also would like one in the core scheduler's use
> > of smp_mb__after_spinlock(), because it would be easy for core scheduler
> > change to miss th
On Thu, Jun 08, 2017 at 08:00:15PM +1000, Nicholas Piggin wrote:
> I have those, I just also would like one in the core scheduler's use
> of smp_mb__after_spinlock(), because it would be easy for core scheduler
> change to miss that quirk. Sure we can say that Peter and scheduler
> maintainers kno
On Thu, 08 Jun 2017 19:54:30 +1000
Michael Ellerman wrote:
> Peter Zijlstra writes:
> > On Thu, Jun 08, 2017 at 05:29:38PM +1000, Nicholas Piggin wrote:
> >> On Thu, 8 Jun 2017 08:54:00 +0200
> >> Peter Zijlstra wrote:
> >> >
> >> > Right, so this patch relies on the smp_mb__before_spinloc
Peter Zijlstra writes:
> On Thu, Jun 08, 2017 at 05:29:38PM +1000, Nicholas Piggin wrote:
>> On Thu, 8 Jun 2017 08:54:00 +0200
>> Peter Zijlstra wrote:
>> >
>> > Right, so this patch relies on the smp_mb__before_spinlock ->
>> > smp_mb__after_spinlock conversion that makes the rq->lock RCsc and
On Thu, 8 Jun 2017 09:57:20 +0200
Peter Zijlstra wrote:
> On Thu, Jun 08, 2017 at 05:29:38PM +1000, Nicholas Piggin wrote:
> > On Thu, 8 Jun 2017 08:54:00 +0200
> > Peter Zijlstra wrote:
> >
> > > On Thu, Jun 08, 2017 at 10:32:44AM +1000, Nicholas Piggin wrote:
> > > > On Wed, 07 Jun 2017 1
On Thu, Jun 08, 2017 at 05:29:38PM +1000, Nicholas Piggin wrote:
> On Thu, 8 Jun 2017 08:54:00 +0200
> Peter Zijlstra wrote:
>
> > On Thu, Jun 08, 2017 at 10:32:44AM +1000, Nicholas Piggin wrote:
> > > On Wed, 07 Jun 2017 18:15:06 +0200
> > > Peter Zijlstra wrote:
> > >
> > > > Now that the s
On Thu, 8 Jun 2017 08:54:00 +0200
Peter Zijlstra wrote:
> On Thu, Jun 08, 2017 at 10:32:44AM +1000, Nicholas Piggin wrote:
> > On Wed, 07 Jun 2017 18:15:06 +0200
> > Peter Zijlstra wrote:
> >
> > > Now that the scheduler's rq->lock is RCsc and thus provides full
> > > transitivity between sch
