From: Pavel Machek <pavel@ucw.cz>
To: Mikulas Patocka <mpatocka@redhat.com>
Cc: "Alasdair G. Kergon" <agk@redhat.com>,
Mike Snitzer <msnitzer@redhat.com>,
Jonathan Brassow <jbrassow@redhat.com>,
Edward Thornber <thornber@redhat.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Jens Axboe <axboe@kernel.dk>,
Christoph Hellwig <hch@infradead.org>,
dm-devel@redhat.com, linux-kernel@vger.kernel.org,
linux-scsi@vger.kernel.org
Subject: Re: [PATCH 1/15] block copy: initial XCOPY offload support
Date: Mon, 4 Aug 2014 16:09:25 +0200 [thread overview]
Message-ID: <20140804140925.GA24261@amd.pavel.ucw.cz> (raw)
In-Reply-To: <alpine.LRH.2.02.1407151534180.14632@file01.intranet.prod.int.rdu2.redhat.com>
On Tue 2014-07-15 15:34:47, Mikulas Patocka wrote:
> This is Martin Petersen's xcopy patch
> (https://git.kernel.org/cgit/linux/kernel/git/mkp/linux.git/commit/?h=xcopy&id=0bdeed274e16b3038a851552188512071974eea8)
> with some bug fixes, ported to the current kernel.
>
> This patch makes it possible to use the SCSI XCOPY command.
>
> We create a bio that has REQ_COPY flag in bi_rw and a bi_copy structure
> that defines the source device. The target device is defined in the
> bi_bdev and bi_iter.bi_sector.
>
> There is a new BLKCOPY ioctl that makes it possible to use XCOPY from
> userspace. The ioctl argument is a pointer to an array of four uint64_t
> values.
But it is there only for block devices, right?
Is there plan to enable tools such as /bin/cp to use XCOPY?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2014-08-04 14:09 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-15 19:34 [PATCH 0/15] SCSI XCOPY support for the kernel and device mapper Mikulas Patocka
2014-07-15 19:34 ` [PATCH 1/15] block copy: initial XCOPY offload support Mikulas Patocka
2014-07-18 13:03 ` Tomas Henzl
2014-07-18 14:35 ` Mikulas Patocka
2014-08-04 14:09 ` Pavel Machek [this message]
2014-08-05 22:45 ` Mikulas Patocka
2014-07-15 19:35 ` [PATCH 2/15] block copy: use two bios Mikulas Patocka
2014-07-15 19:35 ` [PATCH 3/15] block copy: report the amount of copied data Mikulas Patocka
2014-07-15 19:36 ` [PATCH 4/15] block copy: use a timer to fix a theoretical deadlock Mikulas Patocka
2014-07-15 19:37 ` [PATCH 5/15] block copy: use merge_bvec_fn for copies Mikulas Patocka
2014-07-15 19:37 ` [PATCH 6/15] block copy: use asynchronous notification Mikulas Patocka
2014-07-15 19:39 ` [PATCH 7/15] dm: remove num_write_bios Mikulas Patocka
2014-07-15 19:39 ` [PATCH 8/15] dm: introduce dm_ask_for_duplicate_bios Mikulas Patocka
2014-07-15 19:40 ` [PATCH 9/15] dm: implement copy Mikulas Patocka
2014-07-15 19:40 ` [PATCH 10/15] dm linear: support copy Mikulas Patocka
2014-07-15 19:41 ` [PATCH 11/15] dm stripe: " Mikulas Patocka
2014-07-15 19:42 ` [PATCH 12/15] dm kcopyd: introduce the function submit_job Mikulas Patocka
2014-07-15 19:43 ` [PATCH 13/15] dm kcopyd: support copy offload Mikulas Patocka
2014-07-15 19:43 ` [PATCH 14/15] dm kcopyd: change mutex to spinlock Mikulas Patocka
2014-07-15 19:44 ` [PATCH 15/15] dm kcopyd: call copy offload with asynchronous callback Mikulas Patocka
2014-08-28 21:37 ` [PATCH 0/15] SCSI XCOPY support for the kernel and device mapper Mike Snitzer
2014-08-29 10:29 ` Martin K. Petersen
2015-12-10 17:29 [PATCH 0/15] copy offload patches Mikulas Patocka
2015-12-10 17:30 ` [PATCH 1/15] block copy: initial XCOPY offload support Mikulas Patocka
2015-12-10 17:30 ` Mikulas Patocka
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