From: Rogier Wolff <R.E.Wolff@BitWizard.nl>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
David Brownell <david-b@pacbell.net>,
Matthew Dharm <mdharm-kernel@one-eyed-alien.net>,
Greg KH <greg@kroah.com>,
linux-usb-devel@lists.sourceforge.net,
linux-kernel@vger.kernel.org
Subject: Re: [linux-usb-devel] Re: [BK PATCH] USB changes for 2.5.34
Date: Sun, 15 Sep 2002 15:54:08 +0200 [thread overview]
Message-ID: <20020915155408.C11949@bitwizard.nl> (raw)
In-Reply-To: <Pine.LNX.4.44.0209101156510.7106-100000@home.transmeta.com>
On Tue, Sep 10, 2002 at 12:03:00PM -0700, Linus Torvalds wrote:
> In other words, if a user is faced with a dead machine with no other way
> to even know what BUG() triggered than to try to set up a cross debugger,
> just how useful is that BUG()? I claim it is pretty useless - simply
> because 99+% of all people won't even make a bug report in that case,
> they'll just push the reset button and consider Linux unreliable.
I just had an idea: There are the periodic discussions about
dumping the oops-report somewhere where you can log it on the next
boot, right?
Disk drivers may be unreliable etc etc.
Main memory is probably cleared on boot, right? (would have been too
obvious).
I'm pretty sure that my system has 16M of non-cleared memory: The
video RAM. The state of my screen before the crash always shows up
while X is starting.... (I was running a foolishly old 2.4.3-ac3 until
a couple of weeks ago)
Is my system special in that it doesn't clear video RAM? Can we
grab a pointer to video memory when we boot, check a magic
value, if OK, print the oops report from last crash, put in a new
magic value ("No oops report"), and when we crash write in the
crash report with the special magic value?
Roger.
--
** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2137555 **
*-- BitWizard writes Linux device drivers for any device you may have! --*
* The Worlds Ecosystem is a stable system. Stable systems may experience *
* excursions from the stable situation. We are currenly in such an *
* excursion: The stable situation does not include humans. ***************
next prev parent reply other threads:[~2002-09-15 13:50 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-09 22:17 [BK PATCH] USB changes for 2.5.34 Greg KH
2002-09-10 0:17 ` Linus Torvalds
2002-09-10 0:19 ` Greg KH
2002-09-10 0:30 ` Linus Torvalds
2002-09-10 0:40 ` [linux-usb-devel] " Alan Cox
2002-09-10 1:41 ` Linus Torvalds
2002-09-10 1:48 ` Linus Torvalds
2002-09-10 10:23 ` Andries Brouwer
2002-09-10 0:35 ` Nicholas Miell
2002-09-10 1:01 ` [patch] dump_stack(): arch-neutral stack trace Andrew Morton
2002-09-15 4:34 ` Daniel Phillips
2002-09-15 4:51 ` Andrew Morton
2002-09-10 1:27 ` [BK PATCH] USB changes for 2.5.34 Linus Torvalds
2002-09-10 2:07 ` Matthew Dharm
2002-09-10 2:49 ` Linus Torvalds
2002-09-10 2:59 ` Linus Torvalds
2002-09-10 16:32 ` [linux-usb-devel] " David Brownell
2002-09-10 16:51 ` Linus Torvalds
2002-09-10 17:16 ` Jeff Garzik
2002-09-10 18:16 ` David S. Miller
2002-09-10 18:40 ` Linus Torvalds
2002-09-10 18:48 ` Jeff Garzik
2002-09-10 19:31 ` David S. Miller
2002-09-10 19:32 ` Oliver Xymoron
2002-09-10 19:38 ` Linus Torvalds
2002-09-10 19:43 ` Jeff Garzik
2002-09-10 21:52 ` Bill Davidsen
2002-09-10 22:02 ` Jeff Garzik
2002-09-10 18:44 ` Alan Cox
2002-09-10 19:03 ` Linus Torvalds
2002-09-10 19:27 ` Rik van Riel
2002-09-10 20:18 ` Alan Cox
2002-09-10 22:00 ` David Woodhouse
2002-09-10 22:23 ` Alan Cox
2002-09-10 22:26 ` David Woodhouse
2002-09-10 23:01 ` Alan Cox
2002-09-10 19:29 ` David S. Miller
2002-09-15 5:10 ` Daniel Phillips
2002-09-15 5:33 ` Daniel Berlin
2002-09-15 16:41 ` Daniel Phillips
2002-09-16 0:32 ` Horst von Brand
2002-09-15 6:07 ` Pete Zaitcev
2002-09-15 7:00 ` Andrew Morton
2002-09-15 14:53 ` Daniel Phillips
2002-09-15 18:23 ` Pete Zaitcev
2002-09-15 18:34 ` Jeff Garzik
2002-09-16 0:55 ` Larry McVoy
2002-09-15 20:05 ` David Woodhouse
2002-09-15 21:35 ` Rob Landley
2002-09-16 3:00 ` Larry McVoy
2002-09-16 3:08 ` Daniel Phillips
2002-09-16 11:16 ` Henning P. Schmiedehausen
2002-09-16 18:35 ` Thunder from the hill
2002-09-16 18:45 ` Daniel Phillips
2002-09-16 19:36 ` Thunder from the hill
2002-09-16 19:40 ` Daniel Phillips
2002-09-16 8:50 ` Ian Molton
2002-09-16 9:37 ` Rob Landley
2002-09-15 18:06 ` Linus Torvalds
2002-09-15 18:36 ` Roman Zippel
2002-09-15 19:04 ` Daniel Jacobowitz
2002-09-15 19:43 ` Andrew Morton
2002-09-15 19:43 ` Daniel Phillips
2002-09-15 23:24 ` Larry McVoy
2002-09-15 23:41 ` Daniel Jacobowitz
2002-09-15 23:52 ` Larry McVoy
2002-09-16 0:01 ` Robert Love
2002-09-16 1:29 ` Alan Cox
2002-09-16 2:13 ` Larry McVoy
2002-09-16 11:05 ` Henning P. Schmiedehausen
2002-09-16 14:05 ` Rogier Wolff
2002-09-16 16:24 ` Marco Colombo
2002-09-16 0:44 ` Daniel Phillips
2002-09-16 1:23 ` Alan Cox
2002-09-15 19:07 ` Daniel Phillips
2002-09-16 9:06 ` Jens Axboe
2002-09-16 15:15 ` Daniel Phillips
2002-09-16 15:59 ` kernel debuggers was [Re: [linux-usb-devel] Re: [BK PATCH] USB changes for 2.5.34] Soewono Effendi
2002-09-16 14:14 ` [linux-usb-devel] Re: [BK PATCH] USB changes for 2.5.34 David Woodhouse
2002-09-16 14:53 ` Jens Axboe
2002-09-15 19:08 ` Linus Torvalds
2002-09-15 19:10 ` Daniel Phillips
2002-09-15 19:26 ` Linus Torvalds
2002-09-15 19:32 ` Daniel Jacobowitz
2002-09-15 19:48 ` Daniel Phillips
2002-09-16 4:59 ` Jeff Dike
2002-09-16 4:05 ` Daniel Phillips
2002-09-16 4:55 ` Jeff Dike
2002-09-15 19:35 ` Daniel Phillips
2002-09-16 4:51 ` Jeff Dike
2002-09-16 15:29 ` Oliver Xymoron
2002-09-18 0:33 ` Rusty Russell
2002-09-18 0:46 ` Linus Torvalds
2002-09-18 0:50 ` Daniel Phillips
2002-09-18 1:16 ` Rik van Riel
2002-09-15 13:54 ` Rogier Wolff [this message]
2002-09-15 5:01 ` Daniel Phillips
2002-09-10 16:46 ` Thunder from the hill
2002-09-10 16:56 ` Vojtech Pavlik
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