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Date: Fri, 23 Jan 2009 17:29:20 +0100
From: Ed Schouten <ed@80386.nl>
To: Lars Engels <lme@FreeBSD.org>
Message-ID: <20090123162920.GT41248@hoeg.nl>
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Cc: current@freebsd.org
Subject: Re: panic: mutex Giant not owned at
	/usr/src/sys/kern/tty_ttydisc.c:1127
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Hello Lars,

As HPS said, the issue seems to be related to ubt, but there's still
something else that is interesting to see here:

* Lars Engels <lme@FreeBSD.org> wrote:
> #2  0xc0859512 in panic (fmt=3DVariable "fmt" is not available.
> ) at /usr/src/sys/kern/kern_shutdown.c:576
> #3  0xc0849fc7 in _mtx_assert (m=3D0xc0d76e90, what=3D4, file=3D0xc0c30b4=
c "/usr/src/sys/kern/tty_ttydisc.c", line=3D1127) at /usr/src/sys/kern/kern=
_mutex.c:639
> #4  0xc08aebad in ttydisc_getc (tp=3D0xc4650c00, buf=3D0xf12ea920, len=3D=
128) at /usr/src/sys/kern/tty_ttydisc.c:1127
> #5  0xc0740604 in sctty_outwakeup (tp=3D0xc4650c00) at /usr/src/sys/dev/s=
yscons/syscons.c:323
> #6  0xc0740b6c in scgetc (sc=3D0xc0f11f20, flags=3D3) at /usr/src/sys/dev=
/syscons/syscons.c:3281
> #7  0xc0741190 in sc_cngetc (cd=3D0xc0cc9be0) at /usr/src/sys/dev/syscons=
/syscons.c:1607
> #8  0xc0821a28 in cncheckc () at /usr/src/sys/kern/kern_cons.c:379
> #9  0xc0821a66 in cngetc () at /usr/src/sys/kern/kern_cons.c:357
> #10 0xc04bfb15 in db_readline (lstart=3D0xc0d45cc0 "\n", lsize=3D120) at =
/usr/src/sys/ddb/db_input.c:326

Sam Leffler also reported this issue to me privately. I'll see what I
can do to fix this.

--=20
 Ed Schouten <ed@80386.nl>
 WWW: http://80386.nl/

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