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From: John Baldwin <jhb@FreeBSD.org>
To: Julian Elischer <julian@elischer.org>
Date: Thu, 9 Sep 2004 15:26:29 -0400
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cc: Andrew Gallatin <gallatin@cs.duke.edu>
cc: freebsd-threads@FreeBSD.org
Subject: Re: Unkillable KSE threaded proc
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On Thursday 09 September 2004 03:08 pm, Julian Elischer wrote:
> >I'm following it from 0xc1a22540 for today's lockup:
> >
> >(kgdb) p $proc->p_mtx
> >$3 = {
> >  mtx_object = {
> >    lo_class = 0xc069e55c,
> >    lo_name = 0xc067788d "process lock",
> >    lo_type = 0xc067788d "process lock",
> >    lo_flags = 0x430000,
> >    lo_list = {
> >      tqe_next = 0x0,
> >      tqe_prev = 0x0
> >    },
> >    lo_witness = 0x0
> >  },
> >  mtx_lock = 0xc1b617d2,
> >  mtx_recurse = 0x0
> >}
> >
> >
> >0xc1b617d2 is almost the same as the thread id of the
> >first thread (0xc1b617d0)..

That means it has a flag set, 2 = MTX_CONTESTED meaning that it is a contested 
lock.  0xc1b617d0 is the thread that owns the lock.

-- 
John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org