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 = &lppaca_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 = &lppaca_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. pse
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 t
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
+++ b/arch/powerpc/include/asm
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.
> S
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 @@
> #de
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