RHEL5 Xen domU CPU spike results in excessive dom0 iowait
Issue
During a CPU and IO utilization spike on a Xen domU virtual machine, the dom0 host shows a large jump in load. This causes the dom0 to become unresponsive for time despite no noticeable workload running on the dom0.
Environment
- Red Hat Enterprise Linux 5
- Xen paravirtualization
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