[lkml]   [2017]   [Sep]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH RFC hack dont apply] intel_idle: support running within a VM
On Sat, Sep 30, 2017 at 12:01 AM, Michael S. Tsirkin <> wrote:
> intel idle driver does not DTRT when running within a VM:
> when going into a deep power state, the right thing to
> do is to exit to hypervisor rather than to keep polling
> within guest using mwait.
> Currently the solution is just to exit to hypervisor each time we go
> idle - this is why kvm does not expose the mwait leaf to guests even
> when it allows guests to do mwait.
> But that's not ideal - it seems better to use the idle driver to guess
> when will the next interrupt arrive.

The idle driver alone is not sufficient for that, though.


 \ /
  Last update: 2017-09-30 01:24    [W:0.056 / U:0.056 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site