Re: [PATCH 2/9] Sched clock paravirt op fix.patch

[Rik van Riel]

Andi Kleen wrote:
> On Tue, Mar 13, 2007 at 09:07:09AM -0700, Chris Wright wrote:
> > * Jeremy Fitzhardinge (jeremy@xxxxxxxx) wrote:
> > > In other words, regardless of whether this particular pv_op lives or
> > > dies, we're going to need to have to deal with stolen time properly.  I
> > > think this hook is reasonable and useful step towards doing that.
> > Exactly.  Normal interrupts we can handle.  Having CPU completely
> > disappear for unkown time periods we can't, and will need to.
>
> But that is just what a interrupt is.

Interrupts tend to be reasonably short though.

Steal time can be several hypervisor/host time slices long.

As an aside, normal interrupts *are* accounted for separately
in /proc/stat, so why not steal time too?

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