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Why is my VM running slow

asked 2013-04-11 13:33:24 -0600

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Why is my VM running slow as molasses?

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answered 2013-04-11 13:34:13 -0600

this post is marked as community wiki

This post is a wiki. Anyone with karma >75 is welcome to improve it.

There is a permissions issue where /dev/kvm is not writable, and the VM's drop into qemu mode which causes the slowdown. You can verify that this is the issue with:

cat /var/log/libvirt/qemu/(internal_id).log | grep -i kvm

In the results, look for:

open /dev/kvm: Permission denied
Could not initialize KVM, will disable KVM support

Fix with:

chgrp kvm /dev/kvm
chmod g+rwx /dev/kvm
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Asked: 2013-04-11 13:33:24 -0600

Seen: 2,194 times

Last updated: Apr 11 '13