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[Bug runtime/9947] lockdep triggered on rawhide with tracepoints


------- Additional Comments From jistone at redhat dot com  2009-03-13 00:41 -------
The scenario to make this actually deadlock seems to be pretty pathological.  We
would have to be unregistering a tracepoint from the work queue at the same time
as cleanup_module is trying to destroy the work queue.  We only run the work
queue while there's a transport channel attached though, which means the module
refcnt is non-zero, so the only way to also be in cleanup_module is with a
*forced* rmmod.  Even the rmmod manpage says that forcing is extremely
dangerous, so I wouldn't apologize too much if we locked up in that scenario.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=9947

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