linux-kernel - Re: [PATCH 0/15] copy offload patches

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Message-ID: <yq1r3iuylwd.fsf@sermon.lab.mkp.net>
Date:	Thu, 10 Dec 2015 17:33:06 -0500
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Mikulas Patocka <mpatocka@...hat.com>
Cc:	"James E.J. Bottomley" <JBottomley@...n.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Jens Axboe <axboe@...nel.dk>,
	Mike Snitzer <msnitzer@...hat.com>,
	Jonathan Brassow <jbrassow@...hat.com>, dm-devel@...hat.com,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-block@...r.kernel.org, Mike Christie <michaelc@...wisc.edu>
Subject: Re: [PATCH 0/15] copy offload patches

>>>>> "Mikulas" == Mikulas Patocka <mpatocka@...hat.com> writes:

Mikulas,

Mikulas> This patch series adds copy offload (the XCOPY command) to the
Mikulas> block layer, SCSI subsystems and device mapper.

Now that the VFS stuff appears to stabilize I agree it's a good time to
revisit all this. I just merged the required VPD patches from Hannes so
those will be in 4.5.

I have a bunch of changes to the SCSI code that I worked on over the
spring/summer based on a feedback from the array vendors after
discussions we started at LSF/MM. Generally speaking, their comments
didn't make things easier, nor prettier :( But your two bio approach is
a requirement to accommodate those needs (token-based copy) so I'll work
on consolidating your changes with mine.

That said, we still need Mike Christie's patches to go in first.

Mike: What's your status? I'm afraid I didn't get a chance to dig very
deep in your series since it coincided with me scrambling to sort out
SCSI for 4.4. Do you think there's a chance we could get your patches in
shape for 4.5? Is there an up-to-date tree I can look at?

-- 
Martin K. Petersen	Oracle Linux Engineering
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