RE: [Xen-devel] Re: event delay issue on SMP machine when xen0 is SMPenabled

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

>>You always remember a good reason not to do something after 
>>sending the 
>>email. :-)
>>
>>IPIs and VIRQs must be processed by their home vcpu. Hence we do need 
>>to limit evtchn processing to the current bound vcpu, and that leads 
>>(currently) to the problem you see.
>>
>>So I think the right fix is just to fix unmask_evtchn(). Maybe 
>>you guys 
>>want to send a patch to move it into evtchn.c and fix it to send to 
>>cpu_from_evtchn(evtchn)?
>>
>
>Since evtchn code is critical to xen, we are very careful when finding
>any possible fixes :-)
>Why not turn on cpu_evtchn_mask by default, and when calling
>bind_evtchn_to_cpu, we turn off it on other cpus.
>

Or when binding interdomain evtchn in xen0, we turn on it on each cpu?
-Xin

>Thanks
>-Xin
>
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