System died because of ide-scsi

System died because of ide-scsi

[Nikita V. Youshchenko]

Hello.

I'm not sure where to report bugs in ide-scsi in kernel 2.4, so trying 
here ...

I've just suffered a system misbehaviour that ended with a system crash on 
a production server running Linux kernel 2.4.24 SMP. This server acts as 
terminal server here, running 10-15 KDE sessions.

The problem happened when someone started CD recording operation while CD 
was mounted. (It's interesting why he was able to do that, but that's 
another story).

After that, system because very unresponsive (up to 10 seconds to process a 
key press). System load meter was able to refresh it's screen for several 
times, and showed both CPUs were "100% SYS".

It wass possible to switch server console from X to text console (athough 
it took up to mitute to process Ctrl+Alt+F1). On the text cousole, about 
onse a second the following line was printed:

ide-scsi: Strange, packet command initiated yet DRQ isn't asserted

I could log in as root on the console and type several commands (again, up 
to 10 seconds to process a key press). I tried to reset the device using 
hdparm, and that caused kernel oops.


I don't feel I can debug this problem myself. However, if it will help, I 
will provide all system information on request.

Re: System died because of ide-scsi

[Oliver Feiler]

On Monday 19 January 2004 12:08, Nikita V. Youshchenko wrote:
> Hello.
>
> I'm not sure where to report bugs in ide-scsi in kernel 2.4, so trying
> here ...

[...]

> ide-scsi: Strange, packet command initiated yet DRQ isn't asserted
>
> I could log in as root on the console and type several commands (again, up
> to 10 seconds to process a key press). I tried to reset the device using
> hdparm, and that caused kernel oops.

Hm, I reported what looks like a similar problem some time ago. At least the 
symptom, but not what caused it. Though I didn't get an oops.

See my previous mail: 
http://www.ussg.iu.edu/hypermail/linux/kernel/0312.2/0792.html

Also got "ide-scsi: Strange, packet command initiated yet DRQ isn't asserted" 
and afaict this happened the first time since I used 2.4.23. Maybe it is the 
same problem?

If you got an oops you should probably post it. After running through ksymoops 
of course. :)

Bye,
Oliver

-- 
Oliver Feiler  <kiza@(kcore.de|lionking.org|gmx[pro].net)>

Re: System died because of ide-scsi

[Nikita V. Youshchenko]

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Hello,

> See my previous mail:
> http://www.ussg.iu.edu/hypermail/linux/kernel/0312.2/0792.html

I don't think it is the same.

> If you got an oops you should probably post it. After running through
> ksymoops of course. :)

Unfortunately the oops dump was lost (it was on the console of the crashed 
server, and the server was rebooted immidiatly.

However, I found some information, including some traces, in system logs. 
It is attached.

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