Date: Sun, 26 Jan 1997 02:38:37 -0700 (MST) From: Don Yuniskis <dgy@rtd.com> 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: <199701260938.CAA07377@seagull.rtd.com> In-Reply-To: <199701260856.TAA23790@godzilla.zeta.org.au> from "Bruce Evans" at Jan 26, 97 07:56:20 pm
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> >> probing all the devices. printf() doesn't have any flow control. It > >> can't afford to pause once the system is up because that would freeze > >> the whole system. Freezing for 1 msec per character to for output at > >> 9600 bps is bad enough. > > > >But would it actually *break* anything? Perhaps I'll hack in a two line > >patch next time I rebuild a kernel and see what happens... > > 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
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