linux-kernel - Re: single bit flip detector.

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Message-ID: <44CFB66E.1080500@tmr.com>
Date:	Tue, 01 Aug 2006 16:15:42 -0400
From:	Bill Davidsen <davidsen@....com>
To:	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: single bit flip detector.

eventuallyDave Jones 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.
> 
> 000: 6b 6b 6b 6b 6a 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
> Single bit error detected. Possibly bad RAM. Run memtest86.

Given the probability of hardware vs. kernel, you could replace 
"possible" with "probable" and not get any argument from me.

-- 
Bill Davidsen <davidsen@....com>
   Obscure bug of 2004: BASH BUFFER OVERFLOW - if bash is being run by a
normal user and is setuid root, with the "vi" line edit mode selected,
and the character set is "big5," an off-by-one errors occurs during
wildcard (glob) expansion.
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