Re: Corrupt data when reading filesystems under Linux guest

[jdev%panix.com@localhost (Jed Davis)]

I've found a new bug in my last fix.

The main problem, it eventually turned out, was a missing break.  Other
things that probably needed fixing anyway, and that I fixed before I
realized that they weren't involved here: some exotic error cases where
a xen_shm extent would have been unmapped twice, and xen_shm_unmap's
not expecting to be reentered through its callbacks.

Oh, and some ratecheck(9)s for the ENOMEM printfs in xen_shm, because
those really are problematic with a 9600 bps console.

So: http://www.panix.com/~jld/xbdback-rc2.patch

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