Re: [Xen-devel] [PATCH] x86/time: fix scale_delta() inline assembly

[Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>]

> From: Sylvain Munaut [mailto:s.munaut@xxxxxxxxxxxxxxxxxxxx]
> Subject: Re: [Xen-devel] [PATCH] x86/time: fix scale_delta() inline assembly
> 
> I've just deployed this to a couple test servers that exhibited the problem.
> 
> What I don't really understand is why are some HW affected and not others ?

I don't know, but I'd imagine there is something in the x86 platform
software (aka firmware) of those machines that runs and blocks execution
of Xen for long enough (via NMI/MCE/SMI) for the platform timer to
overflow, and this doesn't occur on other machines.

Maybe Jan has a better idea...

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