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From: Giorgos Keramidas <keramida@ceid.upatras.gr>
To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
References: <20081205193446.B2902@wojtek.tensor.gdynia.pl>
Date: Fri, 05 Dec 2008 21:16:12 +0200
In-Reply-To: <20081205193446.B2902@wojtek.tensor.gdynia.pl> (Wojciech Puchar's
	message of "Fri, 5 Dec 2008 19:35:34 +0100 (CET)")
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Cc: freebsd-questions@freebsd.org
Subject: Re: what is umtxn
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On Fri, 5 Dec 2008 19:35:34 +0100 (CET), Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> wrote:
> i've got once my asterisk process in umtxn state (as top shows) using
> 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.