[lkml]   [2011]   [Jan]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH 14/16] KVM-GST: KVM Steal time registration
    On 01/24/2011 08:25 PM, Glauber Costa wrote:
    > On Mon, 2011-01-24 at 18:31 -0500, Rik van Riel wrote:
    >> On 01/24/2011 01:06 PM, Glauber Costa wrote:
    >>> Register steal time within KVM. Everytime we sample the steal time
    >>> information, we update a local variable that tells what was the
    >>> last time read. We then account the difference.
    >>> Signed-off-by: Glauber Costa<>
    >>> CC: Rik van Riel<>
    >>> CC: Jeremy Fitzhardinge<>
    >>> CC: Peter Zijlstra<>
    >>> CC: Avi Kivity<>
    >> On second thought - how does this deal with cpu hotplug and
    >> hot unplug?
    >> Do you allocate a new one of these structs every time a cpu
    >> is hot unplugged and then hotplugged, leaking the old one?
    >> Will leaving the old value around confuse the steal time
    >> calculation?
    > If you look closely, there are no allocations happening at all,
    > it's all static.

    In that case, does the per-cpu steal area need to be
    reinitialized at hotplug time?

    All rights reversed

     \ /
      Last update: 2011-01-25 02:29    [W:0.024 / U:7.672 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site