Re: [Xen-devel] [RFC PATCH 2/5] XL: Increase event channels to support more vcpus

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Fri, Aug 25, 2017 at 10:18:24AM +0100, Wei Liu wrote:
> On Thu, Aug 24, 2017 at 10:52:17PM -0400, Lan Tianyu wrote:
> > This patch is to increase event channels to support more vcpus in single VM.
> > 
> > Signed-off-by: Lan Tianyu <tianyu.lan@xxxxxxxxx>
> 
> There is no need to bump the default. There is already a configuration
> option called max_event_channel.

Maybe make this somehow based on the number of vCPUs assigned to the
domain?

It's not very used-friendly to allow the creation of a domain with 256
vCPUs for example that would then get stuck during boot.

Or at least check max_event_channel and the number of vCPUs and print
a warning message to alert the user that things might go wrong with
this configuration.

Roger.

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