linux-kernel - Re: [v3.7 Regression] [SCSI] sd: Implement support for WRITE SAME

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Message-ID: <yq14njh7ouy.fsf@sermon.lab.mkp.net>
Date:	Wed, 19 Dec 2012 15:45:25 -0500
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Mike Snitzer <snitzer@...hat.com>
Cc:	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Joseph Salisbury <joseph.salisbury@...onical.com>,
	Kernel Team <kernel-team@...ts.ubuntu.com>,
	linux-kernel@...r.kernel.org, jgarzik@...hat.com,
	JBottomley@...allels.com, Milan Broz <mbroz@...hat.com>
Subject: Re: [v3.7 Regression]  [SCSI] sd: Implement support for WRITE SAME

>>>>> "Mike" == Mike Snitzer <snitzer@...hat.com> writes:

Mike> But do we know mount to somwhow be issuing WRITE SAME requests?

I'm assuming that ext4 is somehow calling sb_issue_zeroout().


Mike> Martin, why is it you weren't able to reproduce (I haven't
Mike> attempted yet)?

Dunno.

But regardless of any bugs, WRITE SAME will still need some special
attention in the context of dm-crypt.

-- 
Martin K. Petersen	Oracle Linux Engineering
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