RE: [Xen-ia64-devel] machine ITM = nearest guest ITM vs. full guesttime virtualization

["Dong, Eddie" <eddie.dong@xxxxxxxxx>]

Magenheimer, Dan (HP Labs Fort Collins) wrote:
> 
> If you think of the "Xen ITC" as the official ITC, domain switch
> from A to B requires adding the offset of domainA to return to
> Xen ITC, then subtracting the offset of domainB to obtain domainB's
> ITC.
Without tracking last ITC, the guest time IRQ may be missed or multiple
triggered like the bug kevin fix for you 1-2 months ago.
> 
> I think this works and is very simple... but as I said, this hasn't
> been tested because Linux doesn't do it.
Yes, both are not a big cake, but keeping 2 sets of code may cause
future support issues.
eddie

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