[libvirt-users] memoryStats question

[Claudio Bley]

At Tue, 08 Jul 2014 18:21:54 +0300,
Gleb Voronich wrote:
> 
> 
> > In that case, I'd guess that Gleb just forgot to call
> > virDomainSetMemoryStatsPeriod, perhaps?
> I've just performed the same test with CentOS 7 at the host and CentOS
> 7 at the guest.
> Everything works.
> 
> # virsh dommemstat vm1
> actual 1048576
> swap_in 0
> swap_out 0
> major_fault 751
> minor_fault 3958627
> unused 375900
> available 1017988
> rss 978248
> 
> I don't know the reason it doesn't work with ELRepo 3.10.45 kernel but
> I'd really like to.
> According to https://bugzilla.redhat.com/show_bug.cgi?id=601690
> memoryStats should work at host's side starting from 2.6.32-52.el6 so
> I suppose the problem is the guest kernel.
> 
> Do you think this could be caused by an old version of virtio_balloon
> driver?

Maybe. It's hard to tell without exactly knowing what you did...

Try turning on debugging output for libvirtd in order dig into this.

But, since it works in general, it rules out libvirt to be at fault
here. You may have better luck asking on the qemu-user list.

For me, it works with kernel 2.6.32-431.el6.x86_64 from CentOS 6.5.

-- 
Claudio