This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


[Xen-devel] Re: [Pkg-xen-devel] xen 4.1 blktap2 support

(adding xen-devel) 

On Thu, 2011-04-28 at 13:45 +0200, Niccolò Belli wrote:
> Here is my issue with xl:
> Unknown tapdisk type: tapdisk
> 'tap2:tapdisk:aio:/srv/xen/niko.img,xvda,w',
> blktap is loaded, kernel is 2.6.32-xen from squeeze.

The syntax understood by xl is documented in
docs/misc/xl-disk-configuration.txt. It is intended that it supports all
the useful syntaxes which xend did, although since the xend syntax was
never really specified it is perhaps not complete or correct.

I use 'tap:vhd:/scratch/debian-x86_32-2.vhd,xvda,w' and that works, if
you aren't using vhd I'd expect replacing the 'vhd:' with 'qcow:',
'qcow2:' or 'raw:' etc to work. (nb: xl makes no distinction between tap
and tap2 -- you always get tapdisk2). The 'aio:' is ignored by xl (it's
always on) but you can retain it for compatibility with xend if you

xl-disk-configuration.txt mentions the 'tapdisk:' syntax but I don't see
it actually implemented in xl, it would probably be a nop in any case
(since tap: is sufficient to get the behaviour it specifies), in your
case it would be overridden by the 'aio:' anyway AFAICT. There is
ongoing work to improve xl's handling of the disk cfg syntax.


Ian Campbell

I am currently transitioning to a new OpenPGP key, please see:

Reporter (to Mahatma Gandhi): Mr Gandhi, what do you think of Western
Gandhi: I think it would be a good idea.

Attachment: signature.asc
Description: This is a digitally signed message part

Xen-devel mailing list
<Prev in Thread] Current Thread [Next in Thread>