While FreeBSD -current is still moving toward more stable footing, many users have posted issues with panics and deadlocks in recent kernel builds. Bjoern A. Zeeb has kindly compiled a running list of lock order reversals, links to relevant threads, PRs, and existing patches. Lock order reversal messages are the result of FreeBSD’s lock validation facility, witness(4), notifying the system of potential deadlocks as a means for developers to isolate bugs. Robert Watson explains in a Dec. 2003 thread.
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Eugenia Loli
Ex-programmer, ex-editor in chief at OSNews.com, now a visual artist/filmmaker.
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I really hope 5.x turns out well. Its not easy for me to understand how much goes into making something like that stable. Just learning and and playing around with threads made me nervous. I imagine programming such a large project that also handles hardware must be incredibly hard and time consuming.