10-15% iowait on kvm instances on Ubuntu 14.04

Tue Jul 15 07:19:02 UTC 2014

Quoting William Van Hevelingen (wvan13 at gmail.com):

> Does anyone know about any known issues with KVM on Ubuntu Trusty?
> Linux kvm-andromeda 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC

Yes. And it's all related to 3.13.
Upgrade it to 3.15 or downgrade to something other.
I'll bet your IO-wait goes away.

Guess where i rebooted this server with 3.15: https://8n1.org/9896/3a10

With regards,
-Sander.
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