Looks like the culprit is very likely d85b758f72b0 "virtio_net: fix support for small rings". After that patch, my NFS server VM stops responding to packets after a few minutes of testing. Before that patch, my server keeps working. --b. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html