[libvirt-users] minor swap issue ....

[Eric Blake]

On 09/25/2012 09:21 AM, William A. Mahaffey III wrote:
> 
> 
> .... I have a CentOS 5.n VM running on a Fedora 14 server/host,

You do realize that Fedora 14 is no longer supported upstream, right?
The Fedora folks won't support anything older than Fedora 16 at the moment.

> 
> i.e. it took 3+ min. to get back to the prompt for this command (usually
> about 5 sec.) .... This isn't a show-stopped by any means, but it is
> irritating. From the timestamps & data from the host & guest, apparently
> all of that was used up swapping the guest back in. Is there any way to
> either prioritize the VM to not get swapped out, or preferentially
> swapped back in :-) ? TIA for any pointers ....

I have no idea if this problem exists using modern kernels, or even if
you can use recent cgroup scheduling tunables (exposed via domain XML
here: http://libvirt.org/formatdomain.html#elementsCPUTuning) to resolve
your problem.  But you are unlikely to get much assistance unless you
can reproduce the tests using more up-to-date software.

-- 
Eric Blake   eblake at redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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