Re: [Xen-devel] [PATCH v10 6/7] vmx: VT-d posted-interrupt core logic handling

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

> -----Original Message-----
> From: Dario Faggioli [mailto:dario.faggioli@xxxxxxxxxx]
> Sent: Wednesday, January 20, 2016 7:13 PM
> To: Jan Beulich <JBeulich@xxxxxxxx>; Wu, Feng <feng.wu@xxxxxxxxx>
> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>; George Dunlap
> <george.dunlap@xxxxxxxxxxxxx>; Tian, Kevin <kevin.tian@xxxxxxxxx>; xen-
> devel@xxxxxxxxxxxxx; Keir Fraser <keir@xxxxxxx>
> Subject: Re: [PATCH v10 6/7] vmx: VT-d posted-interrupt core logic handling
> 
> On Wed, 2016-01-20 at 01:35 -0700, Jan Beulich wrote:
> > > > > On 20.01.16 at 08:49, <feng.wu@xxxxxxxxx> wrote:
> > > >
> 
> If we put the hook in 'else', we'd always go down the full blocking
> path, even if an event became pending while arranging for that, and
> we'll have to be woken again, as soon as the event is handled. How
> effective an optimization this is depends on how probable and frequent
> it is that we get interrupts during the execution of the hook, which,
> as said, it's not easy to either just tell or measure.

Thanks a lot for your explanation, Dario.

Thanks,
Feng
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