On Mon, Nov 1, 2010 at 7:44 PM, Glauber Costa <glommer@redhat.com> wrote:

On Sat, 2010-10-30 at 21:51 +0800, Richard Chan wrote:
> Hi,
>
> Running Fedora 14 Beta x86_64, yum updated, on AMD Phenom X4 CPU.
>
> All KVM SMP 2.6.35 guests are hanging during boot; the odd thing is
> that the console echoes characters but the system does not come up.
>
> E.g. I had a Ubuntu 10.04 guest which works ok; after upgrading to
> 2.6.35 (Ubuntu 10.10) couldn't boot to shell.
> Fedora 14 beta install DVD also fails to boot to anaconda
>
> The F14 Beta install DVD boots to
>
> hpet0: at MMIO 0xfed0000, IRQs 2, 8, 0
> hpet0: 3 comparators, 64-bit 100.000000 MHz counter
> Switching to clocksource kvm-clock
>
> I've tried clocksource=tsc =hpet0 = acpi_pm

And the results are?

> Tthe console can echo characters but nothing happens.
>
>
> I sort of found this obscure thread on 2.6.35-rc1, pvclock, SMP
> regressions
>
> https://patchwork.kernel.org/patch/226981/
>

Yeah, if it stops hanging with alternative clocksources, it is most
definitely that.