Re: [Xen-users] How do I get rid of vfb?

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2013-11-01 at 11:51 +1300, Lloyd Parkes wrote:
> On 1/11/2013, at 5:32 am, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> 
> > On Thu, 2013-10-31 at 13:41 +1300, Lloyd Parkes wrote:
> >> disk = [ âfile:/disk-image,0x1,w' ]
> > 
> > This is why you are getting a qemu -- it is being used to provide the
> > "qdisk" PV disk backend. It is not being used to provide any emulated
> > devices.
> 
> Thatâs the magic I was missing.
> 
> > I don't think this should result in any VFBs being created, but qemu may
> > be noisy about this while not creating them (you didn't quote the actual
> > message so I can't say for sure).
> 
> It turns that it does change something in how the console works. Once
> I got rid of qemu the command âxl consoleâ started to work. The
> command "xenstore-ls -fâ shows that console/type is now âxenconsoledâ
> instead of âioemuâ. Iâve also noticed that console/tty is no longer
> empty.

Stefano/Anthony, is this a bug in qemu-xen that it doesn't correctly
provide the necessary console services for PV domains or a bug in libxl
because it is configuring the console via qmeu in the first place? (Or
some third bug...)

> 
> > If you want to avoid qemu altogether then you will need to use the
> > kernel backend, which is enabled via phy:/... pointing to whatever the
> > BSD equivalent of Linux's /dev/loop is (I knew once, but can't remember
> > right now).
> 
> Iâve been using NetBSD long enough that youâve given me all the information I 
> need.

Great!

Ian.

> 
> Thanks for the help,
> Lloyd
> 
> 
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