Re: [Xen-devel] [RFC] Extending numbers of event channels

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2012-12-03 at 17:48 +0000, Jan Beulich wrote:
> >>> On 03.12.12 at 18:43, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> > On Mon, 2012-12-03 at 16:29 +0000, Wei Liu wrote:
> >> Hi all
> >> 
> >> There has been discussion on extending number of event channels back in
> >> September [0].
> > 
> > While we are changing the ABI anyway, it would be nice to consider the
> > possibility for some small-ish number of per-vcpu evtchns.
> > 
> > These would potentially be useful for things like IPI vectors and such
> > which every vcpu has.
> 
> While I agree to this, ...
> 
> > e.g. reusing the per-vcpu space in evtchn_pending_sel would give 32 or
> > 64 which would be more than sufficient.
> 
> ... I would have hoped for this field to retain its use as top level
> selector.

Yes, I'm not sure why I thought it became unused...

Ian.



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