kvm guest hangs [was Re: Xen Dom0 [was Re: Announcing Fedora 11 Alpha (blink)]]

[John Summerfield]

Mark McLoughlin wrote:

> 
> Try booting the guest with clocksource=acpi_pm on the kernel command
> line. If that helps, it's this bug:
> 
>   https://bugzilla.redhat.com/475598
> 
> It's an issue with KVM's paravirt clock. We have a workaround in the
> rawhide host kernel which disables kvmclock support on affected hosts. A
> real fix is in progress upstream.
> 
> The F-10 branch has the workaround, but only for the 2.6.29 builds. I
> don't think we have it in the 2.6.27 updates (i.e. the
> private-fedora-10-2_6_27 branch).
> 
> Chuck, could we get linux-2.6-kvmclock-unsync-tsc-workaround.patch
> pulled into F-10?

I'm fully virtualised. I think. What's this about a paravirt clock in KVM?

fwiw my guest is Debian, with a 2.6.18 kernel.


<giggle>
I'm running virtualbox on a new HPDC5850 (AMD 4540B cpu, AMD chipset), 
Windows Server 2003, and on an Apple Leopard-based intellish laptop.

hdparm -t /dev/sda

checks out quite a bit faster on the laptop, both with Debian guests.



-- 

Cheers
John

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