Re: [PATCH 2/8] xen/evtchn: modify evtchn_alloc_unbound to allocate specified port

[Julien Grall <julien@xxxxxxx>]

On 13/07/2022 13:12, Bertrand Marquis wrote:
> > On 13 Jul 2022, at 12:31, Julien Grall <julien@xxxxxxx> wrote:
> > > I can't
> > > see why it would be wrong to have a more tight limit on static ports
> > > than on traditional ("dynamic") ones. Even if only to make sure so
> > > many dynamic ones are left.
> > This is similar to Xen forbidding to close a static port: it is not the 
> > hypervisor business to check that there are enough event channel ports freed 
> > for dynamic allocation.
> On other side we need to be cautious not to add too much complexity in the code 
> by trying to make things always magically work.
> If you want Xen to be accessible to non expert by magically working all the 
> time, there would be a lot of work to do.
It is not clear to me whether you are referring to a developper or admin 
here.
On the admin side, we need to make sure they have an easy way to 
configure event channels. One knob is always going to easier than two knobs.
On the developper side, this could be resolved by better documentation 
in the code/interface.
Cheers,

--
Julien Grall