Re: [Qemu-devel] [PATCH 4/4] spapr: Add support for time base offset migration

[Alexander Graf]

> Am 11.04.2014 um 23:55 schrieb Benjamin Herrenschmidt <address@hidden>:
> 
> On Fri, 2014-04-11 at 11:40 +0200, Alexander Graf wrote:
>>> And G5 uses 33333333. I really do not understand why it is bad to
>>> send-and-check timer frequency. Why?
>> 
>> Because the guest will continue to run at a different TB frequency on 
>> the new host and break.
> 
> Right, which is why we should send it accross so it can be checked and
> we can barf accordingly rather than having random odd things happen :-)

Would the TB frequency ever be different inside the same generation? We can't 
properly support cross-family migration, so we need to bail out on that anyway. 
No need for an additional check here, no?

Alex

> 
> Ben.
> 
>