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