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

Avi Kivity
2010-07-08T09:43:49Z

On 07/07/2010 03:47 PM, 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.
>

I'm unable to reproduce.

Can you provide the stack trace where this hangs? Add
CONFIG_DEBUG_INFO, and then

- copy vmlinux somewhere on the host filesystem
- start the guest
- when it hangs, type 'gdbserver' in the qemu monitor
- on the host, the 'gdb /path/to/vmlinux'
- 'target remote :1234'
- 'backtrace'

--
error compiling committee.c: too many arguments to function