From: Oliver Neukum <oliver@neukum.org>
To: Sau Dan Lee <danlee@informatik.uni-freiburg.de>
Cc: Vojtech Pavlik <vojtech@suse.cz>,
Giuseppe Bilotta <bilotta78@hotpop.com>,
linux-kernel@vger.kernel.org,
Tuukka Toivonen <tuukkat@ee.oulu.fi>
Subject: Re: keyboard problem with 2.6.6
Date: Sun, 30 May 2004 14:32:45 +0200 [thread overview]
Message-ID: <200405301432.45736.oliver@neukum.org> (raw)
In-Reply-To: <xb7isee9kaj.fsf@savona.informatik.uni-freiburg.de>
Am Sonntag, 30. Mai 2004 14:22 schrieb Sau Dan Lee:
> >>>>> "Oliver" == Oliver Neukum <oliver@neukum.org> writes:
>
> >> Where it is now possible to move it out of kernel space WITHOUT
> >> performance problems, why not move it out?
>
> Oliver> Two reasons: security and robustness.
>
> Oliver> 1. sysreq must work, always work. Ideally you even do the
> Oliver> dump in hard irq. USB has been modified to support this.
>
> It doesn't always work. Try to compile 'i8042' and 'atkbd' as
> modules. rmmod one of them, and voila: SysRq doesn't work anymore.
Yes. Remove the driver for your root fs and, lo, the kernel will panic.
You must not confuse kernel and user space. The notion that drivers
can be compiled into modules is not exactly new. In which context they
run is the all important question.
Oliver
next prev parent reply other threads:[~2004-05-30 12:34 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-07 20:55 [PATCH] SERIO_USERDEV: direct userspace access to mouse/keyboard psaux serial ports Tuukka Toivonen
2004-05-08 2:35 ` Andrew Morton
2004-05-25 20:16 ` keyboard problem with 2.6.6 Chris Osicki
2004-05-26 7:54 ` Sau Dan Lee
2004-05-28 13:33 ` Giuseppe Bilotta
2004-05-28 17:37 ` Sau Dan Lee
2004-05-29 13:12 ` Vojtech Pavlik
2004-05-30 9:45 ` Sau Dan Lee
2004-05-30 10:19 ` Vojtech Pavlik
2004-05-30 11:25 ` Sau Dan Lee
2004-05-30 11:40 ` Brad Campbell
2004-05-30 12:01 ` Oliver Neukum
2004-05-30 12:22 ` Sau Dan Lee
2004-05-30 12:32 ` Oliver Neukum [this message]
2004-05-30 12:16 ` Vojtech Pavlik
2004-05-30 12:40 ` Sau Dan Lee
2004-05-30 12:52 ` Vojtech Pavlik
2004-05-30 16:09 ` Stefan Seyfried
2004-05-30 17:26 ` Dmitry Torokhov
2004-06-04 13:58 ` Pavel Machek
2004-06-04 18:17 ` Horst von Brand
2004-06-04 18:37 ` Valdis.Kletnieks
2004-06-04 19:33 ` Denis Vlasenko
2004-06-04 19:50 ` Valdis.Kletnieks
2004-06-04 20:48 ` Denis Vlasenko
2004-06-04 18:39 ` Pavel Machek
2004-06-04 18:46 ` Sau Dan Lee
2004-06-04 19:09 ` Pavel Machek
2004-06-06 9:01 ` Sau Dan Lee
2004-06-06 16:40 ` Pavel Machek
2004-05-28 19:39 ` 2.6.* useland replacements of the atkbd and psmouse modules Sau Dan Lee
2004-05-28 19:57 ` keyboard problem with 2.6.6 Andries Brouwer
2004-06-01 8:21 ` BUG: atkbd.c keyboard driver bug [Was: keyboard problem with 2.6.6] Sau Dan Lee
2004-06-01 9:13 ` BUG FIX: " Sau Dan Lee
[not found] ` <200406010904.i5194pSo010367@fire-2.osdl.org>
2004-06-01 9:44 ` Sau Dan Lee
2004-06-01 9:55 ` Vojtech Pavlik
2004-06-01 10:03 ` Sau Dan Lee
2004-06-01 12:42 ` Giuseppe Bilotta
2004-05-28 19:41 ` keyboard problem with 2.6.6 Andries Brouwer
2004-05-28 20:10 ` Andries Brouwer
[not found] ` <20040528214620.GA2352@gucio>
2004-05-29 13:23 ` Andries Brouwer
2004-05-29 13:46 ` Vojtech Pavlik
2004-05-29 14:30 ` Andries Brouwer
2004-05-29 14:41 ` Vojtech Pavlik
2004-05-29 15:12 ` Giuseppe Bilotta
[not found] <xb7oenxyqly.fsf@savona.informatik.uni-freiburg.de>
[not found] ` <200406071551.i57Fpl89023562@turing-police.cc.vt.edu>
[not found] ` <xb7zn7fwdia.fsf@savona.informatik.uni-freiburg.de>
[not found] ` <200406071636.i57Gafh7024942@turing-police.cc.vt.edu>
[not found] ` <xb7r7sqwncc.fsf@savona.informatik.uni-freiburg.de>
[not found] ` <200406081502.i58F2gF3013622@turing-police.cc.vt.edu>
2004-06-09 8:17 ` Sau Dan Lee
2004-06-09 16:56 ` Valdis.Kletnieks
2004-06-09 17:12 ` Sau Dan Lee
2004-06-09 17:29 ` Valdis.Kletnieks
-- strict thread matches above, loose matches on Subject: below --
2004-06-06 9:43 Sau Dan Lee
2004-06-06 9:37 Sau Dan Lee
2004-06-06 11:29 ` Martin Schlemmer
2004-06-06 12:07 ` Vojtech Pavlik
2004-06-06 15:09 ` Dmitry Torokhov
2004-06-06 16:13 ` Sau Dan Lee
[not found] ` <200406061929.45169.vda@port.imtp.ilyichevsk.odessa.ua>
[not found] ` <200406061140.35929.dtor_core@ameritech.net>
2004-06-06 16:51 ` Sau Dan Lee
[not found] <xb7ekp2b34y.fsf@savona.informatik.uni-freiburg.de>
[not found] ` <20040530112138.GC1377@ucw.cz>
2004-05-30 11:43 ` Sau Dan Lee
2004-05-30 12:45 ` Vojtech Pavlik
2004-05-30 13:25 ` Sau Dan Lee
2004-05-30 10:57 Sau Dan Lee
2004-06-01 11:31 ` Pavel Machek
2004-06-01 14:06 ` John Bradford
2004-05-30 10:45 Sau Dan Lee
2004-05-30 11:20 ` Vojtech Pavlik
2004-05-30 10:39 Sau Dan Lee
2004-05-30 11:18 ` Vojtech Pavlik
2004-05-30 11:40 ` Sau Dan Lee
2004-05-30 11:53 ` Russell King
2004-05-30 12:43 ` Vojtech Pavlik
2004-05-30 13:25 ` Sau Dan Lee
2004-06-01 21:01 ` jsimmons
2004-06-01 21:12 ` Valdis.Kletnieks
2004-05-30 13:54 ` Eduard Bloch
2004-05-30 14:03 ` Vojtech Pavlik
2004-06-01 21:03 ` jsimmons
2004-06-04 14:11 ` Pavel Machek
2004-05-28 13:59 Tuukka Toivonen
2004-05-29 13:14 ` Vojtech Pavlik
2004-06-04 14:54 ` Tuukka Toivonen
2004-06-04 16:06 ` Vojtech Pavlik
[not found] <MPG.1b2111558bc2d299896a2@news.gmane.org.suse.lists.linux.kernel>
[not found] ` <20040525201616.GE6512@gucio.suse.lists.linux.kernel>
[not found] ` <xb7hdu3fwsj.fsf@savona.informatik.uni-freiburg.de.suse.lists.linux.kernel>
[not found] ` <xb7aczscv0q.fsf@savona.informatik.uni-freiburg.de.suse.lists.linux.kernel>
[not found] ` <20040529131233.GA6185@ucw.cz.suse.lists.linux.kernel>
[not found] ` <xb7y8nab65d.fsf@savona.informatik.uni-freiburg.de.suse.lists.linux.kernel>
[not found] ` <20040530101914.GA1226@ucw.cz.suse.lists.linux.kernel>
[not found] ` <xb765aeb1i3.fsf@savona.informatik.uni-freiburg.de.suse.lists.linux.kernel>
[not found] ` <20040530121606.GA1496@ucw.cz.suse.lists.linux.kernel>
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