Re: [libvirt] TSC frequency configuration & invtsc migration (was Re: [PATCH 4/4] kvm: Allow migration with invtsc)
On Thu, Jan 05, 2017 at 08:48:32AM -0200, Marcelo Tosatti wrote:
> Note that even if we follow your suggestion and implement an
> alternative version of patch 4/4 to cover your use case, I will
> strongly recommend libvirt developers to support configuring TSC
> frequency if they want to support invtsc + migration without
> surprising/unpredictable restrictions on migratability.
Well, alright. If you make the TSC frequency of the host
available to mgmt software as you describe, and write the steps mgmt
software should take, i'm good.
Thanks for the help Eduardo.
I'll be happy to not have to add a weird script to
1. Query the host TSC frequency.
2. Pass that to -cpu xxx,tsc-frequency=ZZZ
To my migration scripts.
Probably easy to make that the default behaviour...