RE: [Xen-devel] failed startup caused by unpriveledged domain device nodes not present in priviledged domain

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> > disk = [ 'phy:fs/ns1,sda1,w', 'phy:fs/ns1_swap,sda2,w' ]
> > 
> > When I try and start the domain, I get the following output:
> > 
> > Using config file "/etc/xen/ns1".
> > Error: Error creating domain: vbd: Device not found: sda1
> > 
> > If I replace sda1 with hdc it works (except that it now complains 
> > about sda2).
> 
> IIRC, I had the same problem with a FC3 because of udev and 
> no /dev/sd* devices in the domain0.
> 
> You can either create the devices manually (cd /dev && 
> MAKEDEV sda), or use hda1, hda2 instead of sda1, sda2.

Or, use the numeric form of sda1 '0801'.

> > This strikes me as odd behaviour, shouldn't the device nodes in the 
> > priviledged domains be largely irrelevant for the unpriviledged 
> > domains (in the case of vbds at any rate)?
> 
> Yes, but xen probably needs those in order to find out the 
> major and minor information.
> 
> It would be nice if xen was changed to try some defaults for 
> sd and hd, though.

Yes, we should do this. Patches gratefuly accepted ;-)

Ian


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