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

[George Dunlap <dunlapg@xxxxxxxxx>]

On Mon, Dec 3, 2012 at 6:52 PM, David Vrabel <david.vrabel@xxxxxxxxxx> wrote:

On 03/12/12 16:29, Wei Liu wrote:
> Hi all
>
> There has been discussion on extending number of event channels back in
> September [0].

It seems that the decision has been made to go for this N-level
approach.  Were any other methods considered?

Would a per-VCPU ring of pending events work?  The ABI will be easier to
extend in the future for more event channels.  The guest side code will
be simpler.  It will be easier to fairly service the events as they will
be processed in the order they were raised.

Not having looked in depth at either solution, it does seem like having something like this, rather than an ever-growing array if bits that needs to be examined, would be simpler and more scalable.

 -George

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