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

On 09/25/12 10:57, Eric Blake wrote: > 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. Yes, thanks. I am planning to upgrade this server to CentOS 6.n when I get a chance, but right now, it is serving many purposes, including across-the-LAN backups, singly since another server crashed a HDD a while back. I'll get around to it eventually .... >> 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. > Fedora 12-14 are inputs/basis for RHEL/CentOS 6.n, so I am not clear on why they are not 'modern' or 'up-to-date' ....