Date: Sun, 26 Jan 1997 12:25:46 +0100 (MET) From: Søren Schmidt <sos@ravenock.cybercity.dk> To: bde@zeta.org.au (Bruce Evans) Cc: bde@zeta.org.au, dgy@rtd.com, freebsd-hackers@freefall.freebsd.org Subject: Re: suggestion for kernel printk() ? Message-ID: <199701261125.MAA05236@ravenock.cybercity.dk> In-Reply-To: <199701260959.UAA25500@godzilla.zeta.org.au> from Bruce Evans at "Jan 26, 97 08:59:33 pm"
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In reply to Bruce Evans who wrote:
> >> Yes, it would steal characters from the foreground console unless the
> >> keyboard is dedicated to low-level console input.
> >
> >I guess a single character pushback isn't supported at that level?
> >--don
>
> Right. The low level console driver is very primitive. It does no
> buffering. Doing anything in it would have reentrancy problems, since
> it may be called from interrupt handlers. BTW, there _are_ reentrancy
> problems in the syscons and pcvt output routines. Don't use /dev/ttyv0
> in syscons if you want the system to stay up forever.
Erhm, why ?? I've not seen any problems and ttyv0 is the only tty I
use on my WS (its used almost only under X otherwise)
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Søren Schmidt (sos@FreeBSD.org) FreeBSD Core Team
Even more code to hack -- will it ever end
..
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