Xen: tap:aio (for file-backed vbds) does not work

[fuzzie]

According to the current Xen Users' Manual at http://www.cl.cam.ac.uk/research/srg/netos/xen/readmes/user/user.html#SECTION03320000000000000000 to use a file as virtual block device it is recommended to use

disk = ['tap:aio:/full/path/to/vm1disk,sda1,w']

instead of

disk = ['file:/full/path/to/vm1disk,sda1,w']

in the configuration file of the guest os (DomU). With this configuration the blktap driver will be used instead of the loopback driver which leads to a higher performance.

But this does not work in the current Ubuntu 6.10 (Edgy Eft) release. The following error occurs:

XENBUS: Timeout connecting to device: device/vbd/769 (state 3)

I inspected the kernel configuration and found out that XEN_BLKDEV_TAP is not available with the kernel shipped with edgy (I'm using 2.6.17-6-generic-xen0)

[Jean-Baptiste Lallement (jibel)]

We appreciate the difficulties you are facing, but this version of Ubuntu (Edgy Eft) has reached end of life and is not supported anymore. So we are closing this report. If this is still an issue, can you try with latest Ubuntu release and re-open if needed ? Thanks in advance and don't hesitate to fill any new bug you may find.