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Message #09000
[Bug 1215051] Re: KVM/QEMU guest bridged network loss on kernels 3.8.0-27, and 29
Also, the 3.8.0-30.43 kernel is now available in the -proposed
repository. Would it be possible for you to test this latest kernel and
post back if it resolves this bug?
See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed.
Thank you in advance!
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https://bugs.launchpad.net/bugs/1215051
Title:
KVM/QEMU guest bridged network loss on kernels 3.8.0-27, and 29
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
We have experienced problems on Raring with bridged KVM/QEMU guests
loosing network connection after upgrading any host server to kernel
3.8.0-27, and 3.8.0-29. This has occurred on 4 separate host
machines.
This tends to happen sooner / more often, to guests which generate
more traffic than others. The only way to recover networking is to
shutdown or force-stop the guest, and restart it. We have attempted
to do a live-migration of a guest in this condition, which resulted in
the source-host server kernel panicing.
All host diagnostics including: ifconfig, "virsh domiflist", and
"brctl show" outputs look identical to working guests. On the guest,
the interface appears up, there are no syslog errors, the guest can
ping it's own address, but any outgoing communication fails.
This looks just like Ubuntu Precise bug #997978, which affected us
last year as well..
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References