On Tue, Sep 17, 2013 at 07:53:36PM +0000, KY Srinivasan wrote: > > > Thanks Gleb. Here is the link for the latest Hyper-V specification: > > > http://www.microsoft.com/en-us/download/details.aspx?id=39289 > > > > > > This spec talks about how migration is handled with regards to TSC. > > > > > All I can see is "15.4.3 Partition Reference TSC Mechanism". I see > > nothing about HV_X64_MSR_TSC_FREQUENCY specifically. To access this MSR > > a partition needs AccessFrequencyMsrs privilege, may be partition that > > cab be migrated does not have this privilege? > > If you use the MSR to read the TSC frequency, then indeed when you migrate then there > is no guarantee that the TSC frequency won't change when you migrate. The approach > described in section 15.4.3 is the preferred approach that can accommodate migration. > Thanks. -- Gleb. _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
