Re: 2.6.19-rc6-rt7: Kernel BUG at kernel/rtmutex.c:672

[Ingo Molnar]

* Fernando Lopez-Lezcano <nando@xxxxxxxxxxxxxxxxxx> wrote:

> Nov 28 03:26:39 localhost kernel: Kernel BUG at kernel/rtmutex.c:672

hm, this means the lock was taken twice by the same task: enabling 
CONFIG_PROVE_LOCKING ought to tell us the precise locking info and 
backtraces that causes this situation. I looked at the code and it wasnt 
obvious at first sight. (we should only be holding cache_chain_mutex 
here, and l3->list_lock should not be taken at this point.)

	Ingo
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