On Sat, 2011-08-20 at 12:44 +0100, Richard Kettlewell wrote:
The emulated screen was blank and
did not respond to any input. The kernel log is full of messages as
shown below. They almost all name the same executable, apache_accesses
(from package munin-node) and have the same backtraces, but are
different PIDs (it is not a long-running process).
The exception is a "BUG: soft lockup - CPU#0 stuck for 35s!" message,
also below.
The guest is a news server, with around a kilobyte/second of network
traffic going into it at all times.
The guest has 512MB RAM assigned. It has a gigabyte of swap available
and doesn't seem to have been using much of it.
[...]
That does sound wrong.
Could it be that the host is slow to service the guest's disk I/O?