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Date: Tue, 25 Sep 2007 19:54:52 +0200
From: Kris Kennaway <kris@FreeBSD.org>
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To: Ivan Voras <ivoras@freebsd.org>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: Kernel panic on PowerEdge 1950 under certain stress load
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Ivan Voras wrote:
> Kris Kennaway wrote:
> 
>> Does it really? i.e. did you compare the function names in detail and 
>> find that they match precisely, or do you just mean "they are both 
>> panics of some description and I dunno what it all means"? :)  I ask 
>> because the linked trace does not involve a spinlock, which means it 
>> cannot be precisely the same trace.
> 
> Isn't spinning and waiting "adaptive"? (AFAIK some locks spin for a 
> short while before they wait). At least, that's why I thought they might 
> be the same problem.

Not in the sense of transmuting a sleep mutex into a spin mutex, no. 
sleep mutexes will spin when the lock holder is currently running, but 
this happens within the context of the mtx_lock_sleep function itself.

Kris