Current-Users archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]

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 <>
     NetBSD: 26 ans d'experience feront toujours la difference

Home | Main Index | Thread Index | Old Index