To summarize:
* This is a "RX lockup" condition -- VM still runs, can send traffic
(ARP requests, mostly), but cannot receive replies.
* On Lucid, two backports to 2.6.32 are needed, "virtio_net: Make
delayed refill more reliable" and "Add limit for socket backlog". I
didn't research which mainline versions include them. Debian bugs
#576838 and #592187 discuss each of these backports.
* On Karmic, another backport is needed [1]; not to kernel, but to QEMU:
("Fix a race condition where qemu finds that there are not enough virtio
ring buffers available and the guest make more buffers available before
qemu can enable notifications")
[1] http://forum.proxmox.com/threads/3117-virtio-net-crashing-(stop-
sending-traffic)?p=20247#post20247
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/579276
Title:
Lost network in KVM VM / virtio_net page allocation failure
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
