[Fedora-xen] FC6 File-backed domain kernel panic

[Bill Jenkins <bjenkins cait org>]

  I am having a few problems with Xen on Fedora 6 Test 3.  I am
attempting to use a file-backed container for the individual operating
systems.  Everything installs fine, and runs fine...but when I attempt
to either xm shutdown or xm destroy a domain, and then reboot it with xm
create, it gives a long error, containing, among other things, the
following:

WARNING: leaking g.e. and page still in use!
end_request: I/O error, dev xvda, sector 0
Buffer I/O error on device xvda, logical block 0
WARNING: g.e. still in use!
WARNING: leaking g.e. and page still in use!
end_request: I/O error, dev xvda, sector 0
Buffer I/O error on device xvda, logical block 0
WARNING: g.e. still in use!
WARNING: leaking g.e. and page still in use!
end_request: I/O error, dev xvda, sector 0
Buffer I/O error on device xvda, logical block 0
 unable to read partition table

  If I save the domain into a CHK file and restore it, everything is
fine.  But is this a side-effect of running a file-backed OS?  Or could
there be something else I am doing wrong?

Bill