Re: [PATCH v2 00/11] KVM in-guest performance monitoring

[Jan Kiszka <jan.kiszka@siemens.com>]

On 2011-06-14 19:15, David Ahern wrote:
> On 06/14/2011 02:36 AM, Avi Kivity wrote:
>> On 06/13/2011 10:55 PM, David Ahern wrote:
>>> On 06/13/2011 07:34 AM, Avi Kivity wrote:
>>>>  This patchset exposes an emulated version 1 architectural performance
>>>>  monitoring unit to KVM guests.  The PMU is emulated using perf_events,
>>>>  so the host kernel can multiplex host-wide, host-user, and the
>>>>  guest on available resources.
>>>
>>> Any particular magic needed to try this patchset?
>>>
>>
>> You'll need the attached patch, '-cpu host' (or '-cpu host,model=0'
>> sometimes), and, as patch 2 is a guest bug fix, you'll need to run the
>> patched kernel in the guest as well.
>>
> 
> qemu-kvm is not cooperating. git repo as of 05f1737582 with your patch
> is aborting:
> 
> 		Welcome to Fedora
> Starting udev: [    4.031626] udev[409]: starting version 161
> [    4.831159] piix4_smbus 0000:00:01.3: SMBus Host Controller at
> 0xb100, revision 0
> qemu-kvm: /exports/daahern/qemu-kvm.git/hw/msix.c:616:
> msix_unset_mask_notifier: Assertion `dev->msix_mask_notifier' failed.

Use the qemu-kvm next branch. It has the fix you need.

Jan

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