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Re: [Xen-devel] [PATCH RFC V3 2/4] kvm hypervisor : Add a hypercall to KVM hypervisor to support pv-ticketlocks
- To: Avi Kivity <avi@xxxxxxxxxx>
- From: Raghavendra K T <raghukt@xxxxxxxxxxxxxxxxxx>
- Date: Fri, 02 Dec 2011 17:59:16 +0530
- Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, x86@xxxxxxxxxx, Gleb Natapov <gleb@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Virtualization <virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, Xen <xen-devel@xxxxxxxxxxxxxxxxxxx>, Dave Jiang <dave.jiang@xxxxxxxxx>, KVM <kvm@xxxxxxxxxxxxxxx>, Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Srivatsa Vaddagiri <vatsa@xxxxxxxxxxxxxxxxxx>, Marcelo Tosatti <mtosatti@xxxxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, Sasha Levin <levinsasha928@xxxxxxxxx>, Sedat Dilek <sedat.dilek@xxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Yinghai Lu <yinghai@xxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Dave Hansen <dave@xxxxxxxxxxxxxxxxxx>, Suzuki Poulose <suzuki@xxxxxxxxxxxxxxxxxx>
- Delivery-date: Fri, 02 Dec 2011 15:13:48 +0000
- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
On 12/02/2011 01:20 AM, Raghavendra K T wrote:
+ struct kvm_mp_state mp_state;
+
+ mp_state.mp_state = KVM_MP_STATE_RUNNABLE;
+ if (vcpu) {
+ vcpu->kicked = 1;
+ /* Ensure kicked is always set before wakeup */
+ barrier();
+ }
+ kvm_arch_vcpu_ioctl_set_mpstate(vcpu,&mp_state);
This must only be called from the vcpu thread.
Hmm. Okay. 'll check this.
Yes true. kvm_arch_vcpu_ioctl_set_mpstate itself is redundant, and will
remove this.
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