Gentoo Archives: gentoo-user

From: "Stefan G. Weichinger" <lists@×××××.at>
To: gentoo-user@l.g.o
Subject: [gentoo-user] qemu-kvm and libvirt: running an ancient guest
Date: Tue, 09 Oct 2012 18:53:54
Sorry folks, I get OT again.

I already spent around 3 days now fiddling around with a new and shiny
virtualization server running am64.


I have to run a guest which is old:

Suse Linux 6.1, with a 2.2.5 kernel.
ext2-filesystems in there ...

I run that one OK on an older gentoo-host with vmware-server 2.

That box has failing hardware and I want to get rid of vmware as well
(non-working webGUI etc) ...

So far the VM boots and runs, but the performance is laggy. Seems to be
the IO somehow.

Tried raw-files on xfs, tried LVs, tried various virtual CPUs, caching
on/off, you name it ... still bad.


At first I posted to the list "libvirt-users@××××××.com", you can read
that thread at

Then I subscribed to another list:

Still no helpful reply so far, and my customer gets angry (me too, in a
way ... 3 days, maybe one paid ... another story ...).

Does anyone of you run such old stuff within KVM?


Right now I have on the host:

gentoo-sources 3.6.1 (with all bells and whistles enabled libvirt wanted
me to enable)


(-> stable ebuilds)


When I cp a file within that VM it takes ages ... unfortunately the OS
doesn't bring much modules with it so I can't just swap the virtual
controller for SCSI or so :-(

Another old guest with a slightly newer 2.2 kernel runs just fine ... I
just don't get it.

Corrupt raw-files?? Wouldn't fsck within the guest detect that?

What to chose for 32bit-guests ... arch, cpu, etc.


I am a bit helpless ...

Thanks for any help on this.



Subject Author
Re: [gentoo-user] qemu-kvm and libvirt: running an ancient guest "Stefan G. Weichinger" <lists@×××××.at>