RE: [Xen-devel] [PATCH] Simplify IO event handling since it's now onlyused for IO done notification.

["Li, Xin B" <xin.b.li@xxxxxxxxx>]

>Subject: [Xen-devel] [PATCH] Simplify IO event handling since 
>it's now onlyused for IO done notification.
>
>Simplify IO event handling since it's now only used for IO done
>notification.

Keir,
For the old code, we need it because interrupt notification from qemu
may wake up a vcpu that is waiting for an IO done notification from
Qemu, however, now interrupt notification logic is seperated and using
hypercall, so only after Qemu changes IO slot state to
STATE_IORESP_READY, it will wake up the target vcpu.  Why we still need
wait_on_xen_event_channel now?
BTW, prepare_wait_on_xen_event_channel and wait_on_xen_event_channel
don't need port parameter.
-Xin

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