Re: 2.6.20-rc6: known unfixed regressions (v2) (part 2)

["Uwe Bugla" <uwe.bugla@gmx.de>]

-------- Original-Nachricht --------
Datum: Sun, 28 Jan 2007 23:04:49 -0800 (PST)
Von: Linus Torvalds <torvalds@linux-foundation.org>
An: Mike Galbraith <efault@gmx.de>
CC: Uwe Bugla <uwe.bugla@gmx.de>, Adrian Bunk <bunk@stusta.de>, Andrew Morton <akpm@osdl.org>, gd@spherenet.de, alan@lxorguk.ukuu.org.uk, linux-ide@vger.kernel.org, B.Zolnierkiewicz@elka.pw.edu.pl, Jeff Garzik <jgarzik@pobox.com>, Jens Axboe <jens.axboe@oracle.com>, Mike Christie <michaelc@cs.wisc.edu>, James Bottomley <James.Bottomley@SteelEye.com>
Betreff: Re: 2.6.20-rc6: known unfixed regressions (v2) (part 2)

> 
> 
> [ Added Jeff, Jens and Mike Christie to Cc. I would _guess_ this is 
>   associated with the "larger block pc request" stuff: Mike, Jens? James B
>   added for good luck.
> 
>   It apparently started happening somewhere between 2.6.19 and 2.6.20-rc2,
>   and doing a
> 
> 	gitk v2.6.19..v2.6.20-rc2 block/scsi_ioctl.c drivers/ide/
> 
>   I don't see anything else that really looks all that suspicious.. Unless
>   maybe it's that "Fix SG_IO leak". Jeff added because of the hddtemp 
>   issue, but I think that was effectively SATA-only, so probably isn't 
>   relevant.
> 
>   Damn, I just realized that Jens is in the middle of his vacation for a 
>   week..
> 
>   Mike, can you please look at this and check? ]
> 
> On Mon, 29 Jan 2007, Mike Galbraith wrote:
> > 
> > FWIW, I just tried it with 2.6.20-rc6, and can confirm.  Once nero is
> > run, the kernel never gives up retrying whatever command failed, so I
> > get...
> > 
> > [ 4362.972995] hdd: status error: status=0x58 { DriveReady SeekComplete
> DataRequest }
> > [ 4362.981475] ide: failed opcode was: unknown
> > [ 4362.986183] hdd: drive not ready for command
> 
> Ok, I tried the demo version you can download at
> 
> 	http://www.nero.com/eng/nerolinux-prog.html
> 
> and yes, nerolinux seems broken. I've never used it before, but it 
> triggers:
> 
> 	hda: irq timeout: status=0xc0 { Busy }
> 	ide: failed opcode was: unknown
> 
> and after that there is indeed an endless stream of:
> 
> 	hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }
> 	ide: failed opcode was: unknown
> 	hda: drive not ready for command
> 
> Which eventially switches to
> 
> 	hda: status error: status=0x59 { DriveReady SeekComplete DataRequest
> Error }
> 	hda: status error: error=0x40 { LastFailedSense=0x04 }
> 	ide: failed opcode was: unknown
> 	hda: drive not ready for command
> 
> However, it appears to be rather hard to debug, with nerolinux being some 
> closed black box. Does anybody who knows nero know if there is some way to
> get debug information out of it to see what it tried to do?
> 
> Can somebody try to bisect this?
> 
> 		Linus
Unfortunately not me, Linus, sorry for my ignorance in those things.
But I will try rc7 and see whether this terrible bug is gone.

Regards
Uwe

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