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    SubjectRe: [PATCH v5 4/9] KVM-HV: KVM Steal time implementation
    On 07/04/2011 11:32 AM, Glauber Costa wrote:
    > To implement steal time, we need the hypervisor to pass the guest
    > information about how much time was spent running other processes
    > outside the VM, while the vcpu had meaningful work to do - halt
    > time does not count.
    >
    > This information is acquired through the run_delay field of
    > delayacct/schedstats infrastructure, that counts time spent in a
    > runqueue but not running.
    >
    > Steal time is a per-cpu information, so the traditional MSR-based
    > infrastructure is used. A new msr, KVM_MSR_STEAL_TIME, holds the
    > memory area address containing information about steal time
    >
    > This patch contains the hypervisor part of the steal time infrasructure,
    > and can be backported independently of the guest portion.
    >
    > Signed-off-by: Glauber Costa<glommer@redhat.com>
    > CC: Rik van Riel<riel@redhat.com>
    > CC: Jeremy Fitzhardinge<jeremy.fitzhardinge@citrix.com>
    > CC: Peter Zijlstra<peterz@infradead.org>
    > CC: Avi Kivity<avi@redhat.com>
    > CC: Anthony Liguori<aliguori@us.ibm.com>
    > CC: Eric B Munson<emunson@mgebm.net>

    Acked-by: Rik van Riel <riel@redhat.com>


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