linux-kernel - Re: SATA problems

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Message-ID: <46717BE2.3000703@garzik.org>
Date:	Thu, 14 Jun 2007 13:33:22 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Nigel Kukard <nkukard@...d.net>
CC:	linux-kernel@...r.kernel.org,
	IDE/ATA development list <linux-ide@...r.kernel.org>
Subject: Re: SATA problems

Nigel Kukard wrote:
>>> I'm stumped trying to track down the below intermittent problem.....
>>>
>>> I've confirmed this problem on 2.6.19, 2.6.20 and 2.6.21.

>>> Jun 14 07:55:52 nigel-m2v kernel: ata2.00: exception Emask 0x0 SAct 0x0
>>> SErr 0x0 action 0x2 frozen
>>> Jun 14 07:55:52 nigel-m2v kernel: ata2.00: cmd
>>> ca/00:18:87:e7:00/00:00:00:00:00/e0 tag 0 cdb 0x0 data 12288 out
>>> Jun 14 07:55:52 nigel-m2v kernel:          res
>>> 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
>>> Jun 14 07:55:52 nigel-m2v kernel: ata2: soft resetting port
>>> Jun 14 07:55:52 nigel-m2v kernel: ATA: abnormal status 0x7F on port
>>> 0x0001c807
>>> Jun 14 07:55:52 nigel-m2v kernel: ATA: abnormal status 0x7F on port
>>> 0x0001c807
>>> Jun 14 07:56:22 nigel-m2v kernel: ata2.00: qc timeout (cmd 0xef)
>>> Jun 14 07:56:22 nigel-m2v kernel: ata2.00: failed to set xfermode
>>> (err_mask=0x4)

>> Try 2.6.22-rc4-gitX...

> Is there a patch in particular I can maybe apply? I see you made a
> couple of commits ... my problem is this is also happening on one of my
> production boxes which has a few other patches applied, I'm a bit scared
> of conflicts ... I don't really want to break anything by upgrading the
> kernel.

The two most relevant git commits:

commit 51b94d2a5a90d4800e74d7348bcde098a28f4fb3
Author: Tejun Heo <htejun@...il.com>
Date:   Fri Jun 8 13:46:55 2007 -0700

     sata_promise: use TF interface for polling NODATA commands

commit 464cf177df7727efcc5506322fc5d0c8b896f545
Author: Tejun Heo <htejun@...il.com>
Date:   Sun May 27 15:10:40 2007 +0200

     libata: always use polling SETXFER

If you have a git tree local to you, "git-diff-tree -p $COMMIT" will 
extract a patch, otherwise click "raw" after surfing to 
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=$COMMIT

Regards,

	Jeff


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