Date: Fri, 05 Dec 2008 21:16:12 +0200 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> Cc: freebsd-questions@freebsd.org Subject: Re: what is umtxn Message-ID: <871vwmv3er.fsf@kobe.laptop> In-Reply-To: <20081205193446.B2902@wojtek.tensor.gdynia.pl> (Wojciech Puchar's message of "Fri, 5 Dec 2008 19:35:34 %2B0100 (CET)") References: <20081205193446.B2902@wojtek.tensor.gdynia.pl>
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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.
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