[libvirt] virsh memset
Zvi Dubitzky
DUBI at il.ibm.com
Sat Apr 16 06:13:11 UTC 2011
Sorry , I refer to 'virsh memtune' . Do you know if it is working ok for
any late combination
of libvirt and libcgroup ( e.g libvirt-0.8.8 ) . I could not operate it
.,
thanks
Zvi Dubitzky
Email:dubi at il.ibm.com
Eric Blake <eblake at redhat.com> wrote on 15/04/2011 20:38:55:
> From: Eric Blake <eblake at redhat.com>
> To: Zvi Dubitzky/Haifa/IBM at IBMIL
> Cc: libvir-list at redhat.com
> Date: 15/04/2011 20:39
> Subject: Re: [libvirt] virsh memset
>
> On 04/14/2011 06:04 AM, Zvi Dubitzky wrote:
> > Hi
> >
> > Does anybody know if 'virsh memset' is working ok with its
parameters
> > with the late libvirt code
> > (>= 0.8.8 )? With what libcgroup version ?
>
> 'virsh memset' doesn't depend on cgroups. It relies on the guest
> honoring virtio ballooning requests. Guests like Fedora are wired to do
> this out of the box, but not all guests support it. I'm not sure
> whether the virtio drivers for Windows can do ballooning. If a guest
> can't honor ballooning, then you can't change current memory at runtime;
> however, with very recent git (0.9.1), 'virsh memset --persistent' can
> be used to modify the persistent storage to affect the memory usage on
> the next guest boot.
>
> Or are you referring to 'virsh memtune', which does indeed require
> cgroup support, but does not require any guest interaction?
>
> --
> Eric Blake eblake at redhat.com +1-801-349-2682
> Libvirt virtualization library http://libvirt.org
>
> [attachment "signature.asc" deleted by Zvi Dubitzky/Haifa/IBM]
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