Re: [PATCH RFC V5 0/6] kvm : Paravirt-spinlock support for KVM guests

From: Raghavendra K T
Date: Wed Mar 28 2012 - 14:33:37 EST

On 03/23/2012 01:35 PM, Raghavendra K T wrote:
The 6-patch series to follow this email extends KVM-hypervisor and Linux guest
running on KVM-hypervisor to support pv-ticket spinlocks, based on Xen's

One hypercall is introduced in KVM hypervisor,that allows a vcpu to kick
another vcpu out of halt state.
The blocking of vcpu is done using halt() in (lock_spinning) slowpath.
one MSR is added to aid live migration.

Changes in V5:
- rebased to 3.3-rc6
- added PV_UNHALT_MSR that would help in live migration (Avi)
- removed PV_LOCK_KICK vcpu request and pv_unhalt flag (re)added.

Sorry for pinging
I know it is busy time. But I hope to get response on these patches in your free time, so that I can target next merge window for this. (whether it has reached some good state or it is heading in reverse direction!). it would really boost my morale.
especially MSR stuff and dropping vcpu request bit for PV unhalt.

- Raghu

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