Marcelo Tosatti wrote: > VMX initializes the TSC offset for each vcpu at different times, and > also reinitializes it for vcpus other than 0 on APIC SIPI message. > > This bug causes the TSC's to appear unsynchronized in the guest, even if > the host is good. > > Older Linux kernels don't handle the situation very well, so > gettimeofday is likely to go backwards in time: > > http://www.mail-archive.com/[email protected]/msg02955.html > http://sourceforge.net/tracker/index.php?func=detail&aid=2025534&group_id=180599&atid=893831 > > Fix it by initializating the offset of each vcpu relative to vm creation > time, and moving it from vmx_vcpu_reset to vmx_vcpu_setup, out of the > APIC MP init path. > > >
This is good in principle, but we need to detect if we're on a multiple board host (or a host with unsynced tscs) and do something else in that case. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
