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Re: [PATCH] enable pvhvm vcpu placement in kernel



On Tue, 8 Nov 2011, Konrad Rzeszutek Wilk wrote:
> On Thu, Oct 27, 2011 at 10:28:59PM -0700, zhenzhong.duan@xxxxxxxxxx wrote:
> > pvhvm running with more than 32 vcpus and pv_irq/pv_time enabled 
> > need vcpu placement to work, or else it will softlockup.
> 
> Stefano?

Ack.

> > 
> > Signed-off-by: Zhenzhong Duan <zhenzhong.duan@xxxxxxxxxx>
> > ---
> > diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
> > index da8afd5..1f92865 100644
> > --- a/arch/x86/xen/enlighten.c
> > +++ b/arch/x86/xen/enlighten.c
> > @@ -1356,7 +1356,7 @@ static int __cpuinit xen_hvm_cpu_notify(struct notifier_block *self,
> >  	int cpu = (long)hcpu;
> >  	switch (action) {
> >  	case CPU_UP_PREPARE:
> > -		per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
> > +		xen_vcpu_setup(cpu);
> >  		if (xen_have_vector_callback)
> >  			xen_init_lock_cpu(cpu);
> >  		break;
> > @@ -1386,7 +1386,6 @@ static void __init xen_hvm_guest_init(void)
> >  	xen_hvm_smp_init();
> >  	register_cpu_notifier(&xen_hvm_cpu_notifier);
> >  	xen_unplug_emulated_devices();
> > -	have_vcpu_info_placement = 0;
> >  	x86_init.irqs.intr_init = xen_init_IRQ;
> >  	xen_hvm_init_time_ops();
> >  	xen_hvm_init_mmu_ops();
> 
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