questions on nonsleepable lock

Nex Mon sugarfreemonkey at
Tue Aug 14 23:42:54 PDT 2007

Hello All,

Can someone point me out or explain the technical details of this kernel

sleeping thread (tid 100093, pid 2676) owns nonsleepable lock
panic: sleeping thread

Is this caused by incorrect use of mutex or semaphores? Is this
related to kernel scheduling? Can this be addressed at the
user process? I've tried looking throught the freebsd mailing list
archives and documentations but coudn't find a real good answer to
solve or prevent this problem.

Im using freebsd 6.1 with SMP enabled on a Xeon dual core hardware. The
system has several busy applications running, But the load average is very
minimal, around 8.55 and no process hogging the CPU. So I expect my system
should be running smoothly without in problem.

I appreciate any help.

Thanks a lot,

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