linux-kernel - Re: x86_64 SATA DVD drive + libata trouble

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Date:	Mon, 12 Nov 2007 17:48:52 +0100
From:	Bernd Strieder <strieder@...ormatik.uni-kl.de>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	linux-kernel@...r.kernel.org, Robert Hancock <hancockr@...w.ca>
Subject: Re: x86_64 SATA DVD drive + libata trouble

Hello,

> > I have a Tyan mainboard with NVIDIA chipset CK804. The only
> > SATA/IDE device is a SATA DVD combo, the harddisks are on a
> > RAID controller from 3ware. The harddisks are fine.

> A dmesg and further info would be useful here. Also knowing how
> much memory your system has and whether it passes memtest86.

It has 8GB RAM and passes memtest86, I had one run.

>
> > So there are clearly some problems with libata in this system.
>
> CK804 is known to work reliably. That means we are looking for
> something thats "different" about your system - perhaps the
> devices, the amount of memory etc.

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

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.

Bernd Strieder

View attachment "cdrominfo.openSuSE2.6.22.5-31-default" of type "text/plain" (432 bytes)

View attachment "dmesg.openSuSE2.6.22.5-31-default-2000M" of type "text/plain" (41444 bytes)

View attachment "cdrominfo.openSuSE2.6.22.5-31-default-2000M" of type "text/plain" (433 bytes)

View attachment "dmesg.openSuSE2.6.22.5-31-default-adma0" of type "text/plain" (43017 bytes)

View attachment "cdrominfo.openSuSE2.6.22.5-31-default-adma0" of type "text/plain" (433 bytes)

View attachment "kernelmess" of type "text/plain" (34292 bytes)

View attachment "dmesg.openSuSE2.6.22.5-31-default" of type "text/plain" (43171 bytes)