On Wed, Jun 01, 2016 at 03:07:14PM +0100, Will Deacon wrote:
> On Wed, Jun 01, 2016 at 02:45:41PM +0200, Peter Zijlstra wrote:
> > On Wed, Jun 01, 2016 at 01:13:33PM +0100, Will Deacon wrote:
> > > On Wed, Jun 01, 2016 at 02:06:54PM +0200, Peter Zijlstra wrote:
> >
> > > > Works for me; but that
On 06/01/2016 05:31 AM, Peter Zijlstra wrote:
On Tue, May 31, 2016 at 04:01:06PM -0400, Waiman Long wrote:
You are doing two READ_ONCE's in the smp_cond_load_acquire loop. Can we
change it to do just one READ_ONCE, like
--- a/include/asm-generic/barrier.h
+++ b/include/asm-generic/barrier.h
@@
On Wed, Jun 01, 2016 at 02:45:41PM +0200, Peter Zijlstra wrote:
> On Wed, Jun 01, 2016 at 01:13:33PM +0100, Will Deacon wrote:
> > On Wed, Jun 01, 2016 at 02:06:54PM +0200, Peter Zijlstra wrote:
>
> > > Works for me; but that would loose using cmpwait() for
> > > !smp_cond_load_acquire() spins,
On Wed, Jun 01, 2016 at 01:13:33PM +0100, Will Deacon wrote:
> On Wed, Jun 01, 2016 at 02:06:54PM +0200, Peter Zijlstra wrote:
> > Works for me; but that would loose using cmpwait() for
> > !smp_cond_load_acquire() spins, you fine with that?
> >
> > The two conversions in the patch were both
On Wed, Jun 01, 2016 at 02:06:54PM +0200, Peter Zijlstra wrote:
> On Wed, Jun 01, 2016 at 01:00:10PM +0100, Will Deacon wrote:
> > On Wed, Jun 01, 2016 at 11:31:58AM +0200, Peter Zijlstra wrote:
> > > Will, since ARM64 seems to want to use this, does the below make sense
> > > to you?
> >
> > Not
On Wed, Jun 01, 2016 at 01:00:10PM +0100, Will Deacon wrote:
> On Wed, Jun 01, 2016 at 11:31:58AM +0200, Peter Zijlstra wrote:
> > Will, since ARM64 seems to want to use this, does the below make sense
> > to you?
>
> Not especially -- I was going to override smp_cond_load_acquire anyway
>
On Wed, Jun 01, 2016 at 11:31:58AM +0200, Peter Zijlstra wrote:
> On Tue, May 31, 2016 at 04:01:06PM -0400, Waiman Long wrote:
> > You are doing two READ_ONCE's in the smp_cond_load_acquire loop. Can we
> > change it to do just one READ_ONCE, like
> >
> > --- a/include/asm-generic/barrier.h
> >
On Tue, May 31, 2016 at 04:01:06PM -0400, Waiman Long wrote:
> You are doing two READ_ONCE's in the smp_cond_load_acquire loop. Can we
> change it to do just one READ_ONCE, like
>
> --- a/include/asm-generic/barrier.h
> +++ b/include/asm-generic/barrier.h
> @@ -229,12 +229,18 @@ do {
> * value;
On 05/31/2016 05:41 AM, Peter Zijlstra wrote:
Since all asm/barrier.h should/must include asm-generic/barrier.h the
latter is a good place for generic infrastructure like this.
This also allows archs to override the new
smp_acquire__after_ctrl_dep().
Signed-off-by: Peter Zijlstra
