Re: [Xen-devel] [PATCH][v2] Hybrid extension support in Xen

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Tue, 2 Feb 2010, Sheng Yang wrote:
> Well, for us, we want evtchn because we want to improve interrupt intensive 
> passthru device's performance(though too big for the first step, we have 
> experiment patches, but would like to consolidate with the solution of pv_ops 
> dom0). The situation won't change if we still use emulated APIC path...
> 

I think you should keep this as the last step: once you have all the
other PV features working on HVM like Ian suggested, send a patch to
allow a guest kernel to switch from emulated APIC to evtchn for every
device.
If you manage to keep it simple, it could be a win for everyone.


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