Re: [patch 14/21] Xen-paravirt: Add XEN config options and disable unsupported config options.

Jeremy Fitzhardinge
2007-02-16T08:05:43Z

Dan Hecht wrote:
> On 02/15/2007 11:04 PM, Jeremy Fitzhardinge wrote:
>> HZ - I'm assuming dynticks will appear in the short term, and this will
>> become moot
>
> Doesn't Xen send any non-blocked domain a 100hz alarm implicitly,
> without anyway for the guest to disable it? I guess you'll have to
> break kernel/hypervisor compatibility if you want dynticks?

The timer VIRQ will generate events at a fixed 100Hz (which can be
masked, like any other event), but you can also ask for a timer event at
a particular time. We do this already for tickless idle.

J