linux-kernel - Re: single bit flip detector.

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Message-ID: <20060804220644.GA28344@redhat.com>
Date:	Fri, 4 Aug 2006 18:06:44 -0400
From:	Dave Jones <davej@...hat.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	Andreas Schwab <schwab@...e.de>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: single bit flip detector.

On Fri, Aug 04, 2006 at 02:19:55PM -0700, Andrew Morton wrote:
 > On Tue, 1 Aug 2006 20:16:26 -0400
 > Dave Jones <davej@...hat.com> wrote:
 > 
 > > In case where we detect a single bit has been flipped, we spew
 > > the usual slab corruption message, which users instantly think
 > > is a kernel bug.  In a lot of cases, single bit errors are
 > > down to bad memory, or other hardware failure.
 > > 
 > > This patch adds an extra line to the slab debug messages
 > > in those cases, in the hope that users will try memtest before
 > > they report a bug.
 > 
 > Well boy, this has to be the most-reviewed patch ever.  You'd think that
 > I'd apply it with great confidence and warm fuzzies.

I should stick to one-liner fixes.

 > - one decl per line is more patching-friendly and a bit more idiomatic.
 > - make `bad_count' an int: a uchar might overflow
 > - Put a blank line between decls and code
 > - rename `total' to `error', remove `errors'.
 > - there's no need to sum up the errors.
 > - don't need to check for non-zero `errors': we know it is != POISON_FREE.
 > - make it look non-crapful in an 80-col window.
 > - add missing spaces in arithmetic

With this much iteration, I do have one question..
Does it still work ? :-)

		Dave

-- 
http://www.codemonkey.org.uk
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