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xen-devel
[Xen-devel] Re: [PATCH RFC V2 3/5] kvm hypervisor : Add two hypercalls t
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To: |
Sasha Levin <levinsasha928@xxxxxxxxx> |
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Subject: |
[Xen-devel] Re: [PATCH RFC V2 3/5] kvm hypervisor : Add two hypercalls to support pv-ticketlock |
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From: |
Raghavendra K T <raghukt@xxxxxxxxxxxxxxxxxx> |
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Date: |
Mon, 24 Oct 2011 16:30:46 +0530 |
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Cc: |
x86@xxxxxxxxxx, KVM <kvm@xxxxxxxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Virtualization <virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, Dave Jiang <dave.jiang@xxxxxxxxx>, Gleb Natapov <gleb@xxxxxxxxxx>, Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Avi Kivity <avi@xxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, Srivatsa Vaddagiri <vatsa@xxxxxxxxxxxxxxxxxx>, Xen <xen-devel@xxxxxxxxxxxxxxxxxxx>, Sedat Dilek <sedat.dilek@xxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Yinghai Lu <yinghai@xxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Marcelo Tosatti <mtosatti@xxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Suzuki Poulose <suzuki@xxxxxxxxxxxxxxxxxx> |
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Tue, 25 Oct 2011 09:55:53 -0700 |
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<20111023190307.16364.35381.sendpatchset@xxxxxxxxxxxxxxxxxxxx> <20111023190558.16364.2136.sendpatchset@xxxxxxxxxxxxxxxxxxxx> <1319450510.5660.6.camel@lappy> |
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On 10/24/2011 03:31 PM, Sasha Levin wrote:
On Mon, 2011-10-24 at 00:35 +0530, Raghavendra K T wrote:
Add two hypercalls to KVM hypervisor to support pv-ticketlocks.
+static void kvm_pv_kick_cpu_op(struct kvm *kvm, int cpu)
+{
+ struct kvm_vcpu *vcpu = kvm_get_vcpu(kvm, cpu);
+
+ if (vcpu) {
+ vcpu->kicked = 1;
I'm not sure about it, but maybe we want a memory barrier over here?
Yes, Thanks for pointing this. Avi Kivity also pointed same. 'll add
barrier() here.
+ wake_up_interruptible(&vcpu->wq);
+ }
+}
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