linux-kernel - Re: regression: disk error loop (panic?) ide_do_rw

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Message-ID: <469F0770.2090309@cateee.net>
Date:	Thu, 19 Jul 2007 08:40:48 +0200
From:	Giacomo Catenazzi <cate@...eee.net>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	akpm@...ux-foundation.org
Subject: Re: regression: disk error loop (panic?) ide_do_rw_disk-bad:

Linus Torvalds wrote:
> 
> On Thu, 19 Jul 2007, Bartlomiej Zolnierkiewicz wrote:
>> Thanks for finding and fixing this.
>>
>> The latest patch (with additional cleanups) also looks good and should be
>> safe enough (unchanged behavior for all non-pc requests) to merge it now.
>>
>> Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
> 
> Ok, Jens - mind signing off on the patch you sent out, and writing an 
> explanatory message? Feel free to just crib from my explanation of my 
> original patch, or whatever.
> 
> And it would be beautiful if people who saw the bad behaviour before 
> reverting the ide.c changes were to go back to that broken state, and try 
> the patch, and just verify that it acts like it should (ie you should see 
> just a few error messages, and it shouldn't cause the IDE layer to go 
> ballistic any more).

Ok, I tested a5fcaa210626a79465321e344c91a6a7dc3881fa , with
the Jeans' patch with clean-up (Message-ID:
<20070718201152.GL11657@...nel.dk>).

I don't see the error loop. but only 4 errors (2 for each hd, at hddtemp
start)

Jul 19 08:22:19 catee kernel: hda: selected mode 0x45
Jul 19 08:22:23 catee kernel: ide_do_rw_disk - bad command: dev hda:
type=2, flags=104c8
Jul 19 08:22:23 catee kernel:
Jul 19 08:22:23 catee kernel: sector 14657019, nr/cnr 0/0
Jul 19 08:22:23 catee kernel: bio c21a4780, biotail c21a4780, buffer
00000000, data 00000000, len 36
Jul 19 08:22:23 catee kernel: cdb: 12 00 00 00 24 00 00 00 00 00 00 00
00 00 00 00
Jul 19 08:22:23 catee kernel: ide_do_rw_disk - bad command: dev hdc:
type=2, flags=104c8
Jul 19 08:22:23 catee kernel:
Jul 19 08:22:23 catee kernel: sector 34711027, nr/cnr 0/0
Jul 19 08:22:23 catee kernel: bio c21a4740, biotail c21a4740, buffer
00000000, data 00000000, len 36
Jul 19 08:22:23 catee kernel: cdb: 12 00 00 00 24 00 00 00 00 00 00 00
00 00 00 00
Jul 19 08:22:23 catee kernel: ide_do_rw_disk - bad command: dev hdc:
type=2, flags=104c8
Jul 19 08:22:23 catee kernel:
Jul 19 08:22:23 catee kernel: sector 7387152, nr/cnr 0/0
Jul 19 08:22:23 catee kernel: bio c21a4900, biotail c21a4900, buffer
00000000, data 00000000, len 36
Jul 19 08:22:23 catee kernel: cdb: 12 00 00 00 24 00 00 00 00 00 00 00
00 00 00 00
Jul 19 08:22:23 catee kernel: ide_do_rw_disk - bad command: dev hda:
type=2, flags=104c8
Jul 19 08:22:23 catee kernel:
Jul 19 08:22:23 catee kernel: sector 7387152, nr/cnr 0/0
Jul 19 08:22:23 catee kernel: bio c21a4900, biotail c21a4900, buffer
00000000, data 00000000, len 36
Jul 19 08:22:23 catee kernel: cdb: 12 00 00 00 24 00 00 00 00 00 00 00
00 00 00 00
Jul 19 08:22:27 catee kernel: ttyS1: LSR safety check engaged!

The last git tree give me no errors.

patch in Message-ID: <20070718201152.GL11657@...nel.dk>

Tested-By: Giacomo Catenazzi <cate@...ian.org>

ciao
	cate

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