Re: [patch 134/149] x86, paravirt: Add a global synchronization point for pvclock

Glauber Costa
2010-07-07T13:53:20Z

On Wed, Jul 07, 2010 at 02:47:31PM +0200, Peter Palfrader wrote:
> Hey,
>
> Greg KH schrieb am Donnerstag, dem 01. Juli 2010:
>
> > 2.6.32-stable review patch. If anyone has any objections, please let us know.
>
> 2.6.32.16 fails to boot on my KVM domains using qemu-kvm 0.11.1.
>
> Bisecting between 2.6.32.14 which worked and .16 turned up this commit
> as the first culprit[0].
>
> The host is still running 2.6.32.14 and has 8 cores on 2 CPUs. The
> single-cpu KVM domain hangs just after printing 'Write protecting the
> kernel read-only data: 9492k'[1]. On a successful boot this line would
> usually be followed by 'INIT: version 2.86 booting'.
>
> A 2.6.32.16 with this patch reverted boots fine.
>
> If there's any info you need please just ask.
if you boot with another clocksource, and then switch to kvmclock with the machine already
running, do you see anything strange or suspicious?