Am Tue, 6 Mar 2018 11:07:54 +0000 schrieb Andrew Cooper <andrew.coop...@citrix.com>:
> > One option to avoid the TSC option is to run domUs with tsc_mode=native. > > This has the drawback that migrating a domU from a "2.3GHz" class host > > to a "2.4GHz" class host may change the rate at wich the TSC counter > > increases, the domU may not be prepared for that. > > Given that you identify this specifically, why do you think this change > is safe or sensible in the first place? If using the options here, time > will definitely drift in the VM after migrate. This option is a variant of tsc_mode=default for different hosts, and tsc_mode=native for identical hosts. I think the tsc_mode can not be adjusted for running domUs. So it gives some control to the host admin about how to handle the drift. Olaf
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