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Date:      Sat, 26 Feb 2000 23:53:54 +0800
From:      Peter Wemm <peter@netplex.com.au>
To:        "Daniel C. Sobral" <dcs@newsguy.com>
Cc:        Mike Smith <msmith@FreeBSD.org>, Robert Watson <robert+freebsd@cyrus.watson.org>, "Jordan K. Hubbard" <jkh@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject:   Re: cvs commit: src/sys/kern init_main.c 
Message-ID:  <20000226155354.633EF1CE3@overcee.netplex.com.au>
In-Reply-To: Message from "Daniel C. Sobral" <dcs@newsguy.com>  of "Sat, 26 Feb 2000 17:35:56 %2B0900." <38B7906C.117AB55E@newsguy.com> 

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"Daniel C. Sobral" wrote:
> Mike Smith wrote:
> > 
> > The syscons scrollback buffer is _not_ the kernel message buffer.
> > Syscons scrollback buffer is quite small (about 96 lines IIRC), while
> > the kernel message buffer is something like 8K by default.
> 
> Sometimes I wonder if I'm the only person on earth who won't even call
> it a "scrollback buffer" if it's less than 1000 lines... :-) 'guess it
> must be my muddy past.

The other problem is that the "scrollback buffer" is initialized from screen
contents when syscons starts up properly.

If you boot in -v mode you can *easily* get two or three screenfulls of
data scrolled off the top of the screen before sc0 probes and attaches.
You can have a 1 million line "history" but it still won't recover those 3
lost screens of data.  Only dmesg(8)/sysctl can get to it.

Cheers,
-Peter




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