Messages in this thread | | | Date | Wed, 19 Jan 2011 23:59:41 +0530 | From | Srivatsa Vaddagiri <> | Subject | Re: [PATCH 2/3] kvm hypervisor : Add hypercalls to support pv-ticketlock |
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On Wed, Jan 19, 2011 at 06:21:12PM +0100, Peter Zijlstra wrote: > I didn't really read the patch, and I totally forgot everything from > when I looked at the Xen series, but does the Xen/KVM hypercall > interface for this include the vcpu to await the kick from?
No not yet, for reasons you mention below.
> My guess is not, since the ticket locks used don't know who the owner > is, which is of course, sad. There are FIFO spinlock implementations > that can do this though.. although I think they all have a bigger memory > footprint. > > The reason for wanting this should be clear I guess, it allows PI.
Yeah - that would be good to experiment with.
- vatsa
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