linux-kernel - Re: Subject: [v3.8][v3.11][Regression] [SCSI] sd: Update WRITE SAME heuristics

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Message-ID: <52701198.5040501@canonical.com>
Date:	Tue, 29 Oct 2013 15:50:48 -0400
From:	Joseph Salisbury <joseph.salisbury@...onical.com>
To:	Bernd Schubert <bernd.schubert@...m.fraunhofer.de>,
	"Martin K. Petersen" <martin.petersen@...cle.com>
CC:	hpa@...or.com, JBottomley@...allels.com,
	LKML <linux-kernel@...r.kernel.org>,
	Kamal Mostafa <kamal.mostafa@...onical.com>,
	linux-scsi@...r.kernel.org,
	Luis Henriques <luis.henriques@...onical.com>
Subject: Re: Subject:  [v3.8][v3.11][Regression] [SCSI] sd: Update WRITE SAME
 heuristics

On 10/29/2013 03:46 PM, Bernd Schubert wrote:
> Hello Joseph,
>
> On 10/29/2013 08:21 PM, Joseph Salisbury wrote:
>> Hi Martin,
>>
>> A bug was opened against the Ubuntu kernel[0].  After a kernel bisect,
>> it was found that reverting the following commit resolved this bug:
>>
>> commit 66c28f97120e8a621afd5aa7a31c4b85c547d33d
>> Author: Martin K. Petersen <martin.petersen@...cle.com>
>> Date:   Thu Jun 6 22:15:55 2013 -0400
>>
>>      [SCSI] sd: Update WRITE SAME heuristics
>>
>>
>> The regression was introduced as of v3.11-rc1, but it also made it's way
>> into the stable trees.
>>
>> I see that you are the author of this patch, so I wanted to run this by
>> you.  I was thinking of requesting a revert for v3.12, but I wanted to
>> get your feedback first.
>>
>
> James queued this up for 3.13
>
>> http://git.kernel.org/cgit/linux/kernel/git/jejb/scsi.git/commit/?id=735e39e680256a13e7be3492acfb4d9721287a42
>>
>
> Maybe we should try to convince James to take it into 3.12?
>
>
> Cheers,
> Bernd

I'll build a 3.12 test kernel with this commit and ask the bug reporter
to test it.  Thanks for the pointer, Bernd.
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