Re: [Xen-devel] Xen unprivileged domain not booting

[Mark Williamson <Mark.Williamson@xxxxxxxxxxxx>]

Hi Will,

The xm defaults file has a list of entries for each device the domain is going 
to use.  These are what we're referring to as the "exports" - in this case 
they are exported from dom0 using Xen device channels, rather than NFS.  They 
nevertheless have to be exported from dom0 because unprivileged domains can't 
access their own disks directly.

Each entry in the list has a field that is 'r' for read-only or 'w' (or, 
equivalently 'rw') to allow write access.  If you don't have 'w' or 'rw' set 
for the xda1 device, then it will not be able to write to that filesystem, 
causing short writes.

At this point, it's worth noting that you should never share a filesystem 
between two domains unless they both have it mounted read only.  So in this 
case, make sure you also have umounted the filesystem in dom0 before booting 
another domain from it.

HTH,
Mark



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