Re: [Xen-devel] Re: event channel in xenpaging

[Adin Scannell <adin@xxxxxxxxxxxxxx>]

>> I have some questions about event channel in Xenpaging to ask you.
>> 1) In xenpaging it uses Inter-Domainain Commnication (IDC) between
>> dom0 and domU to build bidirectional connection,but I found there is
>> only an event channel notification from xen to dom0 when page faults
>> happens.It seems that xenpaging_resume_page()->xc_evtchn_notify()
>> doesn't make any difference.So why don't use vIRQ between dom0 and xen
>> instead of IDC between dom0 and domU?
>
> I talked with Adin Scannel about that, he has changes to use an event
> channel instead of domctrl for communication. The current event channel
> usage in xenpaging is a noop.

I just sent these patches to xen-devel today if you'd like to test
them.  Basically, you need only do the xc_evtchn_notify() -- although
the domctl will also work if you'd like to do a synchronous resume.

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