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

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Message-ID: <yq1bodq7zdv.fsf@sermon.lab.mkp.net>
Date:	Wed, 19 Dec 2012 11:58:04 -0500
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Joseph Salisbury <joseph.salisbury@...onical.com>
Cc:	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Kernel Team <kernel-team@...ts.ubuntu.com>,
	linux-kernel@...r.kernel.org, snitzer@...hat.com,
	jgarzik@...hat.com, JBottomley@...allels.com
Subject: Re: [v3.7 Regression]  [SCSI] sd: Implement support for WRITE SAME

>>>>> "Joseph" == Joseph Salisbury <joseph.salisbury@...onical.com> writes:

Joseph> I captured the netconsole output from boot until I reproduced
Joseph> the bug. The RIP points to kcryptd_crypt_write_io_submit() in
Joseph> ~/drivers/md/dm-crypt.c.  The output can be seen at:

I'm thinking that dm-crypt should probably set max_write_same_sectors to
0. It doesn't really make much sense for a crypto driver to pass that
command through.

Mike, do you want to look into this?

-- 
Martin K. Petersen	Oracle Linux Engineering
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