Re: [Xen-devel] increase evtchn limits

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

>>> On 21.05.10 at 11:29, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> wrote:
> On 21/05/2010 10:25, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx> wrote:
> 
>>> There are 5 event channels per CPU (timer, reschedule IPI, SMP call function
>>> IPI, SMP call function single IPI, and spinlock wakeup IPI).
> 
> 
> It would be very easy to collapse the four IPIs onto one event channel plus
> a bitmask of IPI reasons. Then that would be a much more economical two
> event channels per CPU. And the change is a hell of a lot easier to
> implement than extensible event channels. I bet it could be knocked together
> in an hour.

Indeed, it didn't occur to me to do it that way, but this sounds pretty
strait forward to implement.

Thanks, Jan


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