From: Valdis.Kletnieks@vt.edu
To: Brad Boyer <flar@allandria.com>
Cc: David Woodhouse <dwmw2@infradead.org>,
Paul Mackerras <paulus@samba.org>,
linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Stop pmac_zilog from abusing 8250's device numbers.
Date: Tue, 03 Apr 2007 22:10:38 -0400 [thread overview]
Message-ID: <7641.1175652638@turing-police.cc.vt.edu> (raw)
In-Reply-To: Your message of "Tue, 03 Apr 2007 16:09:08 PDT." <20070403230908.GA13471@cynthia.pants.nu>
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On Tue, 03 Apr 2007 16:09:08 PDT, Brad Boyer said:
> an abstraction of "serial port" as far as the user is concerned. On
> Solaris, I can say "/dev/term/a" and know that I will get the first
> serial port if it is available without needing to care if it is the
> zs, se or asy driver talking to the hardware.
This is fine if you're trying to boot and find your system console.
It blows complete chunks if the port you're trying to find is the
first port on the special serial card that supports speeds above 115kbaud
because we have a real-time constraint, and even at 115k you fall short
on the timing budget (actual real-life issue we hit on an SGI running IRIX
a number of years ago. Blowing the budget often resulted in a 3,000 pound
motion base to turn into a 3,000 pound jackhammer:
http://www.sv.vt.edu/future/cave/resprj/crane/crane_thor/2001FebReport.html
http://www.moog.com/Media/1/6D2000E500-395_1102.pdf
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next prev parent reply other threads:[~2007-04-04 2:11 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1175610345.2665.15.camel@shinybook.infradead.org>
2007-04-03 23:14 ` Paul Mackerras
2007-04-03 23:28 ` David Woodhouse
2007-04-03 21:29 ` Brad Boyer
2007-04-03 23:57 ` David Woodhouse
[not found] ` <200704032210 02.GA13210@cynthia.pants.nu>
2007-04-03 22:10 ` Brad Boyer
2007-04-04 0:54 ` David Woodhouse
2007-04-03 23:09 ` Brad Boyer
2007-04-04 1:38 ` Alan Cox
2007-04-04 2:05 ` Chris Adams
2007-04-04 2:10 ` Valdis.Kletnieks [this message]
2007-04-04 1:57 ` David Lang
2007-04-04 8:51 ` Russell King
2007-04-04 9:48 ` Geert Uytterhoeven
2007-04-04 16:09 ` H. Peter Anvin
2007-04-04 16:22 ` Linas Vepstas
2007-04-04 16:34 ` David Woodhouse
2007-04-04 17:38 ` Linas Vepstas
2007-04-04 1:16 ` David Miller
2007-04-04 1:28 ` Alan Cox
2007-04-04 1:07 ` David Lang
2007-04-04 1:44 ` Alan Cox
2007-04-04 1:23 ` David Lang
2007-04-04 1:32 ` David Lang
2007-04-04 16:07 ` H. Peter Anvin
2007-04-04 17:50 ` Linas Vepstas
2007-04-04 1:50 ` David Miller
2007-04-04 11:14 ` Alan Cox
2007-04-04 12:20 ` Olivier Galibert
2007-04-04 1:48 ` David Miller
2007-04-04 3:07 ` Gerhard Mack
2007-04-11 16:30 ` Benny Amorsen
2007-04-12 15:34 ` Roland Dreier
2007-04-13 2:45 ` Gerhard Mack
2007-04-13 2:24 ` David Lang
2007-04-13 8:09 ` Geert Uytterhoeven
2007-04-04 0:02 ` David Miller
2007-04-04 0:12 ` David Woodhouse
2007-04-03 22:14 ` Brad Boyer
2007-04-04 1:13 ` Benjamin Herrenschmidt
2007-04-04 1:17 ` David Miller
2007-04-04 1:32 ` Benjamin Herrenschmidt
2007-04-04 0:01 ` [PATCH v2] " David Woodhouse
2007-04-04 1:25 ` [PATCH] " Alan Cox
2007-04-04 4:20 ` Paul Mackerras
2007-04-04 5:19 ` David Woodhouse
2007-04-04 5:50 ` David Miller
2007-04-04 7:04 ` Geert Uytterhoeven
2007-04-04 13:43 ` Maciej W. Rozycki
2007-04-04 7:52 ` Russell King
2007-04-04 8:41 ` David Miller
2007-04-04 5:53 ` Paul Mackerras
2007-04-04 6:03 ` David Woodhouse
2007-04-04 6:31 ` Paul Mackerras
2007-04-04 14:19 ` [PATCH v3] Stop pmac_zilog from abusing 8250's device numbers; optionally David Woodhouse
2007-04-04 23:48 ` Paul Mackerras
2007-04-05 12:45 ` David Woodhouse
2007-04-05 22:53 ` Paul Mackerras
2007-04-05 22:59 ` David Woodhouse
2007-04-05 14:31 ` Atsushi Nemoto
2007-04-05 14:47 ` David Woodhouse
2007-04-05 15:09 ` Atsushi Nemoto
2007-04-05 15:18 ` David Woodhouse
2007-04-05 15:49 ` Atsushi Nemoto
2007-04-05 15:56 ` Geert Uytterhoeven
2007-04-04 8:12 ` [PATCH] Stop pmac_zilog from abusing 8250's device numbers David Miller
2007-04-04 8:38 ` Russell King
2007-04-04 8:43 ` David Miller
2007-04-04 9:00 ` Russell King
2007-04-04 19:58 ` David Miller
2007-04-04 12:21 ` Theodore Tso
2007-04-04 16:10 ` Russell King
2007-04-04 16:16 ` H. Peter Anvin
2007-04-04 16:25 ` Alan Cox
2007-04-04 17:41 ` Theodore Tso
2007-04-04 18:15 ` Russell King
2007-04-04 19:50 ` David Woodhouse
2007-04-05 6:05 ` Paul Mackerras
2007-04-05 8:50 ` Russell King
2007-04-05 16:15 ` Olivier Galibert
2007-04-05 21:41 ` Pavel Machek
2007-04-03 23:56 ` David Miller
2007-04-04 1:13 ` Benjamin Herrenschmidt
2007-04-04 6:58 ` Paul Mackerras
2007-04-04 14:16 ` David Woodhouse
2007-04-03 23:55 ` David Miller
2007-04-04 1:19 ` Alan Cox
2007-04-04 1:21 ` David Miller
2007-04-04 1:36 ` Alan Cox
2007-04-04 1:47 ` David Miller
2007-04-04 7:47 ` Russell King
2007-04-04 9:55 ` Paul Mackerras
2007-04-04 16:06 ` Russell King
2007-04-04 6:58 ` Geert Uytterhoeven
2007-08-14 11:49 ` Olaf Hering
2007-08-14 11:53 ` David Woodhouse
2007-08-14 16:24 ` Olaf Hering
[not found] <fa.RNOVtHsCnerNJiCxv9p57P7pZcA@ifi.uio.no>
[not found] ` <fa.dSkcKtgkzrihvFnFz6eHJ4FfEqo@ifi.uio.no>
[not found] ` <fa.QUe06itDHMey7lWZGdbZCBEo+KI@ifi.uio.no>
[not found] ` <fa.Hc/xBcsQlAMlaXgROFi/tmfDmUc@ifi.uio.no>
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