linux-kernel - Re: [Bug #12263] Sata soft reset filling log

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Date:	Mon, 16 Feb 2009 18:31:28 +0300
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>, Ingo Molnar <mingo@...e.hu>
Cc:	Justin Madru <jdm64@...ab.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Linux IDE <linux-ide@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Hugh Dickins <hugh@...itas.com>,
	Larry Finger <Larry.Finger@...inger.net>,
	Mikael Pettersson <mikpe@...uu.se>
Subject: Re: [Bug #12263] Sata soft reset filling log

Hello, I wrote:

>>>>>>> This message has been generated automatically as a part of a report
>>>>>>> of regressions introduced between 2.6.27 and 2.6.28.

>>>>>>> The following bug entry is on the current list of known regressions
>>>>>>> introduced between 2.6.27 and 2.6.28.  Please verify if it still 
>>>>>>> should
>>>>>>> be listed and let me know (either way).

>>>>>>> Bug-Entry    : http://bugzilla.kernel.org/show_bug.cgi?id=12263
>>>>>>> Subject        : Sata soft reset filling log
>>>>>>> Submitter    : Justin Madru <bevicm@...extreme.com>
>>>>>>> Date        : 2008-12-13 2:07 (64 days old)
>>>>>>> References    : 
>>>>>>> http://marc.info/?l=linux-kernel&m=122913412608533&w=4

>>>>>> I'm still seeing this on .29-rc5, and I think that my bug #12263 
>>>>>> is a duplicate of bug #12609,
>>>>>> or more correctly it's a duplicate of mine because I reported first.

>>>>>> It seems like the bug has been fixed in tip/master for some time now.
>>>>>> Below is the diff of origin and tip from when I tested.

>>>>> Ingo, do you know whinch patch in -tip fixes this regression?

>>>> This one, done on Jan 10, more than a month ago:

>>>>  f1d26da: Revert "libata: Add 32bit PIO support"

>>>> When a commit causes trouble in -tip qa i immediately revert it in 
>>>> 95% of the cases, no questions asked. Especially if it's related to 
>>>> persistent storage.

>>> OK, thanks.

>>> We seem to have a working fix patch for this issue in bug #12609.

>>    Wait, if this is indeed post-2.6.27 regression, it couldn't 
>> possibly have been caused by that patch which got merged during 
>> 2.6.29-rc1 timeframe. Something's up with this bug...

>    Also, it's been reported for a hard disk while regression in bug 
> 12609 only hits the ATAPI devices.  I think that bug 12263 needs to be reopened.

    After referring to the SCSI command codes "cdb 0x1e" means ALLOW MEDIUM 
REMOVAL command -- which could hardly be addressed to an usual hard disk. So, 
it looks like we had a case of the confused bug report which has a lot of info 
on the hard disk while errors were most probably happening with a CD/DVD 
drive. :-)

MBR, Sergei
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