[Pkg-xen-devel] Bug#666135: Bug#666135: Multiple "Domain-0", slow libvirt

Dmitry Ogorodnikov dmitry.b.ogorodnikov at gmail.com
Sun Apr 1 20:46:50 UTC 2012


Hi Thomas,

>> I have a problem with libvirt, it works slow. For example, "virsh
>> list" takes 6..7 seconds.
>>
>> I ask xen-users list with no luck. According to google, this problem
>> is not wide spreaded, so maybe it's debian specific. If not, please
>> hint where I should go next.
>>
>> I found this in libvirt log:
>
> Hi Dmitry,
>
> If you are having an issue with libvirt, why do you send a bug report
> against the Xen hypervisor? It doesn't make sense.

Are you sure this is a libvirt issue? Exactly this libvirt works fine
with KVM, exactly this libvirt works fine with Xen on RHEL5 servers.
libvirt slowness only a symptom.

Xenstore stores incorrect information (or you think
/vm/00000000-0000-0000-0000-000000000000-1,
/vm/00000000-0000-0000-0000-000000000000-2,
/vm/00000000-0000-0000-0000-000000000000-3 is ok?), Xen creates and
uses incorrect information. Bad libvirt, isn't it?

>
>> I have no idea how I can tune it, so I suppose this is a bug.
>
> If you have no idea, IMO you should ask in the relevant user lists,

I already do. Also I try to read xenstoed documentation, but cannot
find something corresponding.
So, while undocumented this is not a feature, this is a bug.

> rather than just sending a bug report against any random package. Also,/vm/00000000-0000-0000-0000-000000000000-
> you can't expect the maintainer of the Xen hypervisor to know specific
> libvirt issues, I believe (I am a heavy user of Xen myself, but never
> used Xen with libvirt).

Forget libvirt, I can remove it for you, is multiple
"/vm/00000000-0000-0000-0000-000000000000-*" entries OK?
How can I remove it permanently, any useful idea?

Regards,
Dmitry





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