[libvirt-users] memoryStats question

[Ján Tomko]

On 07/04/2014 03:18 PM, Claudio Bley wrote:
> At Thu, 03 Jul 2014 17:46:14 +0300,
> Gleb Voronich wrote:
>>
>>
>>> virDomainMemoryStats() gets those stats, if qemu is new enough to
>>> provide them, and if the guest cooperates to provide them.
>> Well I use the latest QEMU 2.0.0
>> I have the latest CentOS 6.5 installed on the guest and unfortunately
>> I can't get more stats that I have.
>>
>>> Which OS are you using in your guests?
>>>
>>> Of course, you need to have the virtio balloon driver up and runnig in
>>> your guests.
>> CentOS 6.5 x86_64
>> It has the balloon driver and it is up and running:
>>
>> # modinfo virtio_balloon
>> filename:
>> /lib/modules/2.6.32-431.17.1.el6.x86_64/kernel/drivers/virtio/virtio_balloon.ko
>> license:        GPL
>> description:    Virtio balloon driver
>> srcversion:     BB9F75B2CAF3435CC507998
>> alias:          virtio:d00000005v*
>> depends:        virtio,virtio_ring
>> vermagic:       2.6.32-431.17.1.el6.x86_64 SMP mod_unload modversions
> 
> In this case, it's your guest kernel that's too old to support these
> stats.
> 
> Apparently, reporting statistics in the balloon driver was introduced
> in the kernel on 24th Feb 2010 (commit
> 9564e138b1f6eb137f7149772438d3f3fb3277dd) which clearly predates
> version 2.6.32 (2nd December 2009).

Acording to the kernel RPM's changelog, this was backported into 2.6.32-38.el6
and released in RHEL 6.0 (Nov 2010):
https://bugzilla.redhat.com/show_bug.cgi?id=601690

Jan

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