Re: [PATCH] Updates to Xen hypercall preemption

[Juergen Gross <jgross@xxxxxxxx>]

On 22.06.23 15:05, Andrew Cooper wrote:
> On 22/06/2023 9:26 am, Peter Zijlstra wrote:
> > On Thu, Jun 22, 2023 at 07:22:53AM +0200, Juergen Gross wrote:
> >
> > > The hypercalls we are talking of are synchronous ones. They are running
> > > in the context of the vcpu doing the call (like a syscall from userland is
> > > running in the process context).
> > (so time actually passes from the guest's pov?)
> Yes.  And in principle it's wired into stolen time.
Sure? I think stolen time is only increased if the vcpu is being descheduled
by Xen. Synchronous hypercalls should be accounted for the calling vcpu.


Juergen

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