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kernel deadlock on fstchg with vnd
do you have an idea on the problem in this thread:
When stoping a Xen guest with virtual disk backed by a file,
the vnconfig -u process won't exit: it hangs on specio, and other processes
hang on fstchg.
From kernel messages, the xbd backed has closed the vnd device which is
being unconfigured, although I can't say if it did before or after
the vnconfig -u process was started (but likely before).
I can't reproduce this when using vnd from userland.
This happens with the file on /, or on a different partition,
with or without -o log. It happens even if the dom0 has a single CPU.
Any idea how to debug this further ?
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
NetBSD: 26 ans d'experience feront toujours la difference
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