linux-kernel - Re: bit errors on spitz

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Message-ID: <20100321204032.GL1933@elf.ucw.cz>
Date:	Sun, 21 Mar 2010 21:40:32 +0100
From:	Pavel Machek <pavel@....cz>
To:	Stanislav Brabec <utx@...guin.cz>
Cc:	Cyril Hrubis <metan@....cz>, Eric Miao <eric.y.miao@...il.com>,
	rpurdie@...ys.net, lenz@...wisc.edu,
	kernel list <linux-kernel@...r.kernel.org>,
	Dirk@...er-online.de, arminlitzel@....de, thommycheck@...il.com,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	dbaryshkov@...il.com, omegamoon@...il.com,
	zaurus-devel@...ts.linuxtogo.org
Subject: Re: bit errors on spitz

On Mon 2010-03-08 12:48:36, Stanislav Brabec wrote:
> Cyril Hrubis wrote:
> 
> > Well I've seen empty lines when editing file with vim
> 
> And I have seen:
> 
> - Unreproducible SIGSEGV of gcc (while Wi-Fi connection over CF card was
>   running).
> - Unreproducible SIGSEGV of opkg (downloading via Wi-Fi connection over
>   CF card).
> - Unreproducible SIGSEGV of rm (called from find command launched via
>   ssh, networking via Wi-Fi connection over CF card).
>   (Hint: Tasks above are HDD-intensive.)
> - Lost blocks while copying from CF to SD.
> - Lost blocks while copying from HDD to SD.
> - Lost blocks while copying from CF to USB flash stick.
> - And I see display noise while CF Wi-Fi card is active.
> 
> These problems appear in all kernels, at least since 2.6.26.
> 
> There is no note in the syslog.

Interesting, I get memory corruption leading to strange
behaviour. Sometimes echo 3 > /proc/sys/vm/drop_caches helps...
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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