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Date:      Mon, 15 Sep 2003 17:53:02 +1000
From:      Peter Jeremy <PeterJeremy@optushome.com.au>
To:        Doug White <dwhite@gumbysoft.com>
Cc:        current@freebsd.org
Subject:   Re: mystery kernel spew
Message-ID:  <20030915075301.GA14775@cirb503493.alcatel.com.au>
In-Reply-To: <20030914191114.C96749@carver.gumbysoft.com>
References:  <31929.12.238.113.137.1063485645.squirrel@mail.yazzy.org> <20030914102130.K93499@carver.gumbysoft.com> <33165.12.238.113.137.1063565187.squirrel@mail.yazzy.org> <20030914191114.C96749@carver.gumbysoft.com>

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On Sun, Sep 14, 2003 at 07:13:09PM -0700, Doug White wrote:
>Incidentally, if you are getting wrapping even without this, you can use a
>serial console to capture the output.  I've had to do this for doing nasty
>ACPI debugging with lots of the options enabled.

For kernel spew, you can also increase the kernel message buffer:
# Size of the kernel message buffer.  Should be N * pagesize.
options         MSGBUF_SIZE=40960

And for the VTYs, you can increase the scroll-back size:
options         SC_HISTORY_SIZE=200     # number of history buffer lines

Both these are kernel compile-time options.

Peter



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