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

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* Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx> wrote:

> Hello.
>
> Rafael J. Wysocki 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@xxxxxxxxxxxxxx>
>>>>>> 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...

SATA uses the SCSI layer, right? It could then perhaps be these bits in 
tip:out-of-tree:

 813104e: Revert "[SCSI] simplify scsi_io_completion()"
 84db545: Revert "[SCSI] Fix uninitialized variable error in scsi_io_completion"
 0eb6038: Revert "[SCSI] Fix error handling for DIF/DIX"
 3cd94dd: Revert "[SCSI] scsi_lib: don't decrement busy counters when inserting commands"
 c27aed5: Revert "[SCSI] scsi_lib: fix DID_RESET status problems"

i needed these to keep an aic7xxx box from crashing. This regression got 
introduced at around 2.6.28-rc1, so it fits the timeframe.

	Ingo
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