On 2016年06月28日 13:03, Boqun Feng wrote:
On Tue, Jun 28, 2016 at 11:39:18AM +0800, xinhui wrote:
[snip]
+{
+ struct lppaca *lp = _of(cpu);
+
+ if (unlikely(!(lppaca_shared_proc(lp) ||
+ lppaca_dedicated_proc(lp
Do you want to detect whether we are
On Tue, Jun 28, 2016 at 11:39:18AM +0800, xinhui wrote:
[snip]
> > > +{
> > > + struct lppaca *lp = _of(cpu);
> > > +
> > > + if (unlikely(!(lppaca_shared_proc(lp) ||
> > > + lppaca_dedicated_proc(lp
> >
> > Do you want to detect whether we are running in a guest(ie. pseries
>
On 2016年06月27日 22:58, Boqun Feng wrote:
Hi Xinhui,
On Mon, Jun 27, 2016 at 01:41:29PM -0400, Pan Xinhui wrote:
This is to fix some holder preemption issues. Spinning at one
vcpu which is preempted is meaningless.
Kernel need such interfaces, So lets support it.
We also should suooprt both
On 2016年06月27日 22:17, Peter Zijlstra wrote:
On Mon, Jun 27, 2016 at 01:41:29PM -0400, Pan Xinhui wrote:
diff --git a/arch/powerpc/include/asm/spinlock.h
b/arch/powerpc/include/asm/spinlock.h
index 523673d..ae938ee 100644
--- a/arch/powerpc/include/asm/spinlock.h
+++
Hi Xinhui,
On Mon, Jun 27, 2016 at 01:41:29PM -0400, Pan Xinhui wrote:
> This is to fix some holder preemption issues. Spinning at one
> vcpu which is preempted is meaningless.
>
> Kernel need such interfaces, So lets support it.
>
> We also should suooprt both the shared and dedicated mode.
>
On Mon, Jun 27, 2016 at 01:41:29PM -0400, Pan Xinhui wrote:
> diff --git a/arch/powerpc/include/asm/spinlock.h
> b/arch/powerpc/include/asm/spinlock.h
> index 523673d..ae938ee 100644
> --- a/arch/powerpc/include/asm/spinlock.h
> +++ b/arch/powerpc/include/asm/spinlock.h
> @@ -52,6 +52,21 @@
>
