what is umtxn

Giorgos Keramidas keramida at ceid.upatras.gr
Fri Dec 5 11:16:22 PST 2008

On Fri, 5 Dec 2008 19:35:34 +0100 (CET), Wojciech Puchar <wojtek at 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.

More information about the freebsd-questions mailing list