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Message-id: <47388F6F.9010603@shaw.ca>
Date:	Mon, 12 Nov 2007 11:37:51 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	Bernd Strieder <strieder@...ormatik.uni-kl.de>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org
Subject: Re: x86_64 SATA DVD drive + libata trouble

Bernd Strieder wrote:
> I managed to get it running with the SuSE kernel when passing 
> adma=0 to sata_nv module, and I managed to get it running when 
> passing mem=2000M to the SuSE kernel. Thanks to Robert for those 
> hints.
> 
> The vanilla kernels I tried 2.6.23.1 and 2.6.24-rc1-git10 (with 
> patch to sata_nv.c from Robert Hancock see 
> https://bugzilla.redhat.com/show_bug.cgi?id=351451)  seem to be 
> very sensitive in this area. Whenever I got them to oops, I did 
> not have much time to get anything read on the screen. 
> 
> I managed under the patched 2.6.24-rc1-git10 to manually load 
> sata_nv and sr_mod, and then I got an OOps like
> 
> Unable to handle ... NULL pointer dref at 0000000000000000 RIP 
> ffffff880edf6a
> .....
> 		libata:ata_qc_prep + 0xe2/0x15b
> .....
> 		srmod:sr_probe

Which patch is this using, the original one from Nov. 2 or the updated 
one from Nov. 10? The original one has a bug.

> I have  attached 3 dmesg outputs with the openSuSE 10.3 kernel and 
> extracts of /var/log/messages, especially some Oopses. The oopses 
> from the vanilla kernels seem to be so bad that they do never end 
> up in a file. 
> 
> I will do some more tests as soon as possible. I have attached the 
> files as I created them, you will have to diff the single files, 
> anyway, to get the important information out, I cannot select for 
> you.


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