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Date: Fri, 5 Dec 2008 20:46:15 +0100 (CET)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Giorgos Keramidas <keramida@ceid.upatras.gr>
In-Reply-To: <871vwmv3er.fsf@kobe.laptop>
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	<871vwmv3er.fsf@kobe.laptop>
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Cc: freebsd-questions@freebsd.org
Subject: Re: what is umtxn
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>> 100% CPU.
>>
>> it was still answering calls.
>>
>> what's umtxn exactly?
>
> A kernel lock operation.  ``procstat -k PID'' may show more details
> about the in-kernel stack of the process that spins on the lock.
>
>
thank you.