Re: [Xen-devel] [PATCH v8] new config option vtsc_tolerance_khz to avoid TSC emulation

[Olaf Hering <olaf@xxxxxxxxx>]

Am Mon, 09 Apr 2018 08:19:53 -0600
schrieb "Jan Beulich" <JBeulich@xxxxxxxx>:

> Is there any guarantee that old hypervisors will send this field as zero
> (rather than some random value)? If so, I think this should be said
> explicitly in the commit message, together with the fact that you
> re-use padding fields.

I have to double check, but I'm sure the whole size of the struct is 
initialized with zero. The commit message already has "Existing padding fields 
are reused to store vtsc_khz_tolerance as u16."

Thanks,

Olaf

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