10-15% iowait on kvm instances on Ubuntu 14.04

[Sander Smeenk]

Quoting William Van Hevelingen (wvan13 at gmail.com):
> After upgrading to the 3.14 kernel our performance has returned to
> normal.  I've filed a bug on launchpad.

Did you upgrade the kernels in both the hypervisor and the guests?

-Sndr.
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