https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=204633
Mark Johnston <ma...@freebsd.org> changed:
What |Removed |Added
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CC| |ma...@freebsd.org
--- Comment #1 from Mark Johnston <ma...@freebsd.org> ---
I think this indicates a bug in the caller rather than UMA. The nomenclature is
a bit confusing: a sleep mutex is just a "default" mutex, i.e. a non-spin
mutex. When a thread blocks on a sleep mutex, it enters bounded sleep; "sleep"
in the free(9) man page refers to unbounded sleep.
The assertion is failing because the thread holds a spin mutex or a critical
section, in which case it is not valid to try and acquire a sleep mutex. It
could probably be triggered in a non-INVARIANTS kernel too, since
uma_zfree_arg() will attempt to acquire the corresponding zone lock, which is
also a sleep mutex.
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