Re: [Xen-devel] Re: [patch 14/21] Xen-paravirt: Add XEN config optionsand disableunsupported config options.

[Rik van Riel]

Dan Hecht wrote:

> Yes, and regardless of whether you run your periodic timer slower than 
> HZ, calibrating time in a VM is always difficult due to the fact the 
> kernel is time sharing the physical cpu.  Why not just ask the 
> underlying hypervisor?

Upstream Xen does just that.

I'm guessing we'll want something similar for KVM paravirt.

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