Re: [PATCH v1 2/2] x86/hyperv: make HvNotifyLongSpinWait hypercall

[Peter Zijlstra]

On Tue, Oct 23, 2018 at 10:57:40AM +0800, Yi Sun wrote:
> On 18-10-22 19:15:16, Peter Zijlstra wrote:

> > > >>>> +#if defined(CONFIG_X86_64) && defined(CONFIG_PARAVIRT_SPINLOCKS) && IS_ENABLED(CONFIG_HYPERV)
> > > >>>> +			if (!hv_notify_long_spin_wait(SPIN_THRESHOLD - loop))
> > > >>>> +				break;
> > > >>>> +#endif
> > 
> > Secondly; how come you thought that was acceptable in any way shape or
> > form?
> > 
> Sorry for that. Will try another way.

Can you try and explain why vcpu_is_preempted() doesn't work for you?