Re: [RFC -v4 PATCH 3/3] kvm: use yield_to instead of sleep in kvm_vcpu_on_spin

From: Rik van Riel
Date: Thu Jan 13 2011 - 19:11:04 EST


On 01/13/2011 10:23 AM, Avi Kivity wrote:
On 01/13/2011 05:06 PM, Rik van Riel wrote:

I think the first patch needs some reference counting... I'd move it to
the outermost KVM_RUN loop to reduce the performance impact.

I don't see how refcounting from that other thread could
possibly help, and I now see that the task_struct_cachep
does not have SLAB_DESTROY_BY_LRU, either :(

What do you have in mind here that would both work and
be acceptable to you as KVM maintainer?


I think a 'struct pid' fits the bill here.

Indeed it does. New patches on the way later, after I have
tested them some more.

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