Brett Mahar brett.ma...@gmail.com writes:
That sounds suspiciously like you are either running fully emulated (eg: no
KVM support) on Slackware, or that you don't have virtio on that platform.
It would be interesting, to me, to know if either of those guesses were
true, because I have a current need to improve my skills diagnosing KVM
performance issues and feedback helps with that. :)
I only thought it was that because I could not think what else it could
be. In the next few weeks I hope to have some time to investigate further,
and will let you know.
Well, cool. FWIW, checking for virtio should be as simple as lspci inside the
guest, and checking if you have a virtio device or not.
Is the backing store for the virtual machine also on the USB disk? If so
it would point a finger toward guest I/O performance is the pain point, and
the introduction of USB would just be making a painful service slower.
In all cases the virtual hard drive was on an (real) external usb drive (not
the same one as the host OS was sometimes on). So I don't think the guest
I/O is the culprit.
Yeah, that would eliminate that by ensuring it was identical.
Daniel
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