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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [BUG 2.6.32.y] Broken PV migration between hosts with different uptime, non-monotonic time?
On 04/05/12 14:10, Philipp Hahn wrote: > Hello David, > > On Friday 04 May 2012 12:39:03 David Vrabel wrote: >> On 04/05/12 09:54, Philipp Hahn wrote: >>> I encountered the following bug when migrating a Linux-2.6.32.54 PV >>> domain on Xen-3.4.3 between different hosts, whose uptime differs by >>> several minutes > ... >> Xen 3.4 doesn't ensure that the TSC is stable across migrates (Xen 4.0 >> does). If the host CPU has the CONSTANT_TSC bit in the Advanced Power >> Management CPUID leaf it will pass this through to the guest which makes >> the guest think the TSC is stable. >> >> Can you try this libxc patch? >> >> 8<------------------------ >> libxc: clear CONSTANT_TSC bit in Advanced Power Management CPUID leaf > > Excellent, that fixes the problem for me and makes perfect sense for me, > since > AFAIK 2.6.37 also received a big TSC patch which is not part of 2.6.32.y > backport. Thanks for testing! I could never repro the migration failures. David _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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