linux-kernel - Re: Serial related oops

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Message-ID: <20070222165650.GA633@flint.arm.linux.org.uk>
Date:	Thu, 22 Feb 2007 16:56:50 +0000
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Jose Goncalves <jose.goncalves@...v.pt>
Cc:	"Michael K. Edwards" <medwards.linux@...il.com>,
	Frederik Deweerdt <deweerdt@...e.fr>,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: Serial related oops

On Thu, Feb 22, 2007 at 03:07:18PM +0000, Jose Goncalves wrote:
> Russell King wrote:
> > On Wed, Feb 21, 2007 at 04:34:15PM -0800, Michael K. Edwards wrote:
> >   
> >> Are you using an unpatched gcc 4.1.1?  Its optimizer did nasty things
> >> to us, at least on an ARM target ...
> >>     
> >
> > That's ruled out.  Please think about it for a moment - serial_in()
> > managed to work correctly most of the time, and then spontaneously
> > changes its well-defined ABI behaviour in a way that analysis of the
> > asm doesn't allow it to.
> >   
> 
> I'm using gcc 3.4.6.
> But I agree with Russell, if it was such a problem it would hit on the
> first iteration of my application and not after 1 day of executing the
> same piece of code...

One thing you might think about is running memtest86 on the machine
for the same kind of time interval, just in case it's something trivial
like bad ram.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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