Re: [RFC PATCH 1/3] kvm: keep track of which task is running a KVM vcpu

Chris Wright
2010-12-03T15:55:36Z

* Rik van Riel (riel@redhat.com) wrote:
> On 12/02/2010 08:18 PM, Chris Wright wrote:
> >* Rik van Riel (riel@redhat.com) wrote:
> >>Keep track of which task is running a KVM vcpu. This helps us
> >>figure out later what task to wake up if we want to boost a
> >>vcpu that got preempted.
> >>
> >>Unfortunately there are no guarantees that the same task
> >>always keeps the same vcpu, so we can only track the task
> >>across a single "run" of the vcpu.
> >
> >So shouldn't it confine to KVM_RUN? The other vcpu_load callers aren't
> >always a vcpu in a useful runnable state.
>
> Yeah, probably. If you want I can move the setting of
> vcpu->task to kvm_vcpu_ioctl.

Or maybe setting in sched_out and unsetting in sched_in.