Re: [Xen-devel] [PATCH v7 15/17] vmx: VT-d posted-interrupt core logic handling

["Wu, Feng" <feng.wu@xxxxxxxxx>]

> -----Original Message-----
> From: Dario Faggioli [mailto:dario.faggioli@xxxxxxxxxx]
> Sent: Wednesday, September 23, 2015 3:12 PM
> To: Wu, Feng; George Dunlap; George Dunlap
> Cc: Jan Beulich; Tian, Kevin; Keir Fraser; Andrew Cooper;
> xen-devel@xxxxxxxxxxxxx
> Subject: Re: [Xen-devel] [PATCH v7 15/17] vmx: VT-d posted-interrupt core 
> logic
> handling
> >
> > Yes, we can go to blocked only from running state. let me clarify a
> > question first: Xen doesn't support kernel preemption, right?
> >
> No, it does not.
> 
> > ( i.e. we
> > can only perform context switch before returning to guest.)
> >
> Yes, we schedule only when SCHEDULE_SOFTIRQ is checked and found to be
> on.

Good, thanks for the confirmation.

Thanks,
Feng
> 
> Dario
> --
> <<This happens because I choose it to happen!>> (Raistlin Majere)
> -----------------------------------------------------------------
> Dario Faggioli, Ph.D, http://about.me/dario.faggioli
> Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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