linux-kernel - Re: [Cbe-oss-dev] [regression/bisected] corrupt CD data after media change and delay

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Date:	Sun, 13 Jul 2008 08:33:51 -0500
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	Alessandro Suardi <alessandro.suardi@...il.com>
Cc:	Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>,
	linux-scsi@...r.kernel.org,
	Linux Kernel Development <linux-kernel@...r.kernel.org>,
	Maarten Bressers <mbres@...too.org>,
	Daniel Drake <dsd@...too.org>,
	Cell Broadband Engine OSS Development 
	<cbe-oss-dev@...abs.org>
Subject: Re: [Cbe-oss-dev] [regression/bisected] corrupt CD data after
	media change and delay

On Sat, 2008-07-12 at 14:08 +0200, Alessandro Suardi wrote:
> On Fri, Jul 11, 2008 at 11:25 PM, Alessandro Suardi
> sr0: rw=0, want=3291928, limit=2097151
> [asuardi@...dman sdlmame0126]$ h | grep siz
>   958  cat /sys/block/sr0/size
>  1031  h | grep siz
> [asuardi@...dman sdlmame0126]$ !958
> cat /sys/block/sr0/size
> 6993536
> 
> <eject, remount DVD>
> 
> [asuardi@...dman sdlmame0126]$ !mount
> mount -r /cdrom
> [asuardi@...dman sdlmame0126]$ cat /sys/block/sr0/size
> 6993536
> 
> <now everything works fine>
> 
> Possibly a new bug then - since size is always the same ?

It looks like a re-manifestation of Geert's bug.

You said everything worked in -rc7, and there actually have been no sr
changes at all between then and now, so I'm a bit confused as to how it
could reappear.  Could you try a bisection search for it (first
re-verify -rc7 is OK, just in case that's a false negative).

Thanks,

James


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