Date: Tue, 28 Feb 2006 15:32:56 -0800
From: Andrew Morton <akpm@osdl.org>
To: Martin Michlmayr <tbm@cyrius.com>
Cc: pavel@suse.cz, rmk+lkml@arm.linux.org.uk, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Convert serial_core oopses to BUG_ON
Message-Id: <20060228153256.64f4781d.akpm@osdl.org>
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Martin Michlmayr <tbm@cyrius.com> wrote:
>
> * Andrew Morton <akpm@osdl.org> [2006-02-28 10:17]:
> > > It will oops in hard-to-guess, place, anyway.
> > Will it?   Where?  Unfixably?
> 
> http://www.linux-mips.org/archives/linux-mips/2006-02/msg00241.html is
> one example we just had on MIPS.  On SGI IP22, using the serial
> console, you'd get the following on shutdown:
> 
> The system is going down for reboot NOW!
> INIT: Sending processes the TERM signal
> INIT: Sending proces
> 
> and then nothing at all.  I'd never have suspected the serial driver,
> had not users reported that the machine shutdowns properly when using
> the framebuffer.
> 
> For the record, I don't mind whether it's BUG_ON or WARN_ON, but I
> just wanted to give this as an example of an "oops in hard-to-guess,
> place".

>From my reading of the above thread, putting the proposed workaround into
serial core will indeed allow people's machines to keep running while
reminding us about the driver bugs.
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