From: Christoph Hellwig <hch@lst.de>
To: Mike Snitzer <snitzer@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>,
axboe@kernel.dk, martin.petersen@oracle.com, agk@redhat.com,
shli@kernel.org, philipp.reisner@linbit.com,
lars.ellenberg@linbit.com, linux-block@vger.kernel.org,
linux-scsi@vger.kernel.org, drbd-dev@lists.linbit.com,
dm-devel@redhat.com, linux-raid@vger.kernel.org
Subject: Re: [PATCH 06/23] dm-kcopyd: switch to use REQ_OP_WRITE_ZEROES
Date: Thu, 23 Mar 2017 15:56:51 +0100 [thread overview]
Message-ID: <20170323145651.GA31771@lst.de> (raw)
In-Reply-To: <20170323145522.GB17127@redhat.com>
On Thu, Mar 23, 2017 at 10:55:22AM -0400, Mike Snitzer wrote:
> See commit 70d6c400a ("dm kcopyd: add WRITE SAME support to dm_kcopyd_zero")
> drivers/md/dm-io.c:do_region() adjusts the WRITE SAME payload to be a
> single page.
>
> So you'd want to tweak dm-io.c accordingly for WRITE ZEROES (presummably
> no payload?)
Yeah, I'll look into it. Any good test case for verifying this code
while I've got your attention?
next prev parent reply other threads:[~2017-03-23 14:56 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-23 14:33 RFC: always use REQ_OP_WRITE_ZEROES for zeroing offload Christoph Hellwig
2017-03-23 14:33 ` [PATCH 01/23] block: renumber REQ_OP_WRITE_ZEROES Christoph Hellwig
2017-03-28 16:12 ` Bart Van Assche
2017-03-28 16:12 ` Bart Van Assche
[not found] ` <1490717553.2573.4.camel-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2017-03-30 8:53 ` hch-jcswGhMUV9g
2017-03-30 8:53 ` hch
2017-03-23 14:33 ` [PATCH 02/23] block: implement splitting of REQ_OP_WRITE_ZEROES bios Christoph Hellwig
2017-03-23 14:33 ` [PATCH 03/23] sd: implement REQ_OP_WRITE_ZEROES Christoph Hellwig
2017-03-28 18:50 ` Bart Van Assche
2017-03-28 18:50 ` Bart Van Assche
[not found] ` <1490726988.2573.16.camel-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2017-03-28 19:33 ` Mike Snitzer
2017-03-28 19:33 ` Mike Snitzer
2017-03-30 2:25 ` Martin K. Petersen
2017-03-30 2:25 ` Martin K. Petersen
2017-03-29 14:51 ` Paolo Bonzini
2017-03-29 16:28 ` Bart Van Assche
2017-03-29 16:28 ` Bart Van Assche
2017-03-29 16:53 ` Paolo Bonzini
2017-03-29 16:53 ` Paolo Bonzini
2017-03-23 14:33 ` [PATCH 04/23] md: support REQ_OP_WRITE_ZEROES Christoph Hellwig
2017-03-23 14:33 ` [PATCH 05/23] dm: " Christoph Hellwig
2017-03-23 14:33 ` [PATCH 06/23] dm-kcopyd: switch to use REQ_OP_WRITE_ZEROES Christoph Hellwig
2017-03-23 14:55 ` Mike Snitzer
2017-03-23 14:56 ` Christoph Hellwig [this message]
2017-03-23 15:10 ` Mike Snitzer
2017-03-27 9:12 ` Christoph Hellwig
2017-03-27 9:12 ` Christoph Hellwig
2017-03-23 14:33 ` [PATCH 07/23] block: stop using blkdev_issue_write_same for zeroing Christoph Hellwig
2017-03-23 14:33 ` [PATCH 08/23] block: add a flags argument to (__)blkdev_issue_zeroout Christoph Hellwig
2017-03-23 14:33 ` [PATCH 09/23] block: add a REQ_UNMAP flag for REQ_OP_WRITE_ZEROES Christoph Hellwig
2017-03-23 14:33 ` [PATCH 10/23] block: add a new BLKDEV_ZERO_NOFALLBACK flag Christoph Hellwig
2017-03-23 14:33 ` [PATCH 11/23] block_dev: use blkdev_issue_zerout for hole punches Christoph Hellwig
2017-03-28 16:50 ` Bart Van Assche
2017-03-28 16:50 ` Bart Van Assche
[not found] ` <1490719834.2573.9.camel-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2017-03-30 8:59 ` hch-jcswGhMUV9g
2017-03-30 8:59 ` hch
2017-03-23 14:33 ` [PATCH 12/23] sd: handle REQ_UNMAP Christoph Hellwig
[not found] ` <20170323143341.31549-13-hch-jcswGhMUV9g@public.gmane.org>
2017-03-28 16:48 ` Bart Van Assche
2017-03-28 16:48 ` Bart Van Assche
2017-03-29 14:57 ` Paolo Bonzini
[not found] ` <1490719722.2573.8.camel-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2017-03-30 9:02 ` hch-jcswGhMUV9g
2017-03-30 9:02 ` hch
[not found] ` <20170330090201.GD12015-jcswGhMUV9g@public.gmane.org>
2017-03-30 15:28 ` Martin K. Petersen
2017-03-30 15:28 ` Martin K. Petersen
2017-03-30 17:30 ` hch
2017-03-30 17:30 ` hch
[not found] ` <20170330173020.GB24229-jcswGhMUV9g@public.gmane.org>
2017-03-31 2:19 ` Martin K. Petersen
2017-03-31 2:19 ` Martin K. Petersen
[not found] ` <yq17f36yypg.fsf-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2017-03-31 7:18 ` hch-jcswGhMUV9g
2017-03-31 7:18 ` hch
2017-03-23 14:33 ` [PATCH 13/23] nvme: implement REQ_OP_WRITE_ZEROES Christoph Hellwig
2017-03-23 14:33 ` [PATCH 14/23] zram: " Christoph Hellwig
2017-03-23 14:33 ` [PATCH 15/23] loop: " Christoph Hellwig
2017-03-23 14:33 ` [PATCH 16/23] brd: remove discard support Christoph Hellwig
2017-03-23 14:33 ` [PATCH 17/23] rbd: remove the discard_zeroes_data flag Christoph Hellwig
2017-03-23 14:33 ` [PATCH 18/23] rsxx: " Christoph Hellwig
2017-03-23 14:33 ` [PATCH 19/23] mmc: " Christoph Hellwig
2017-03-23 14:33 ` [PATCH 20/23] block: stop using discards for zeroing Christoph Hellwig
2017-03-23 14:33 ` [PATCH 21/23] drbd: make intelligent use of blkdev_issue_zeroout Christoph Hellwig
2017-03-23 14:33 ` [PATCH 22/23] drbd: implement REQ_OP_WRITE_ZEROES Christoph Hellwig
[not found] ` <20170323143341.31549-23-hch-jcswGhMUV9g@public.gmane.org>
2017-03-30 10:06 ` Lars Ellenberg
2017-03-30 10:06 ` Lars Ellenberg
2017-03-30 11:44 ` Christoph Hellwig
2017-03-30 12:50 ` [Drbd-dev] " Lars Ellenberg
[not found] ` <20170330114408.GA15777-jcswGhMUV9g@public.gmane.org>
2017-03-30 13:49 ` Mike Snitzer
2017-03-30 13:49 ` Mike Snitzer
[not found] ` <20170330134957.GA508-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-03-30 15:20 ` Martin K. Petersen
2017-03-30 15:20 ` Martin K. Petersen
2017-03-30 23:15 ` Mike Snitzer
[not found] ` <20170330231550.GA3102-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-03-31 2:34 ` Martin K. Petersen
2017-03-31 2:34 ` Martin K. Petersen
2017-03-31 7:17 ` Christoph Hellwig
2017-03-23 14:33 ` [PATCH 23/23] block: remove the discard_zeroes_data flag Christoph Hellwig
2017-03-28 17:00 ` Bart Van Assche
2017-03-28 17:00 ` Bart Van Assche
2017-03-29 14:52 ` Paolo Bonzini
2017-03-30 9:06 ` hch
[not found] ` <20170330090655.GF12015-jcswGhMUV9g@public.gmane.org>
2017-03-30 15:29 ` Martin K. Petersen
2017-03-30 15:29 ` Martin K. Petersen
2017-03-30 17:29 ` hch
[not found] ` <20170323143341.31549-1-hch-jcswGhMUV9g@public.gmane.org>
2017-03-23 15:54 ` RFC: always use REQ_OP_WRITE_ZEROES for zeroing offload Lars Ellenberg
2017-03-23 15:54 ` Lars Ellenberg
2017-03-23 17:02 ` Mike Snitzer
2017-03-23 17:02 ` Mike Snitzer
[not found] ` <20170323170221.GA20854-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-03-23 22:53 ` Lars Ellenberg
2017-03-23 22:53 ` Lars Ellenberg
2017-03-29 14:57 ` Paolo Bonzini
[not found] ` <20170323155410.GD1138-w1SgEEioFePxa46PmUWvFg@public.gmane.org>
2017-03-27 9:10 ` Christoph Hellwig
2017-03-27 9:10 ` Christoph Hellwig
[not found] ` <20170327091056.GB6879-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2017-03-27 14:03 ` Mike Snitzer
2017-03-27 14:03 ` Mike Snitzer
[not found] ` <20170327140307.GA13020-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-03-27 14:57 ` Christoph Hellwig
2017-03-27 14:57 ` Christoph Hellwig
2017-03-27 15:08 ` [Drbd-dev] " Bart Van Assche
2017-03-27 15:08 ` Bart Van Assche
2017-03-30 9:04 ` Christoph Hellwig
2017-03-30 9:04 ` Christoph Hellwig
2017-03-30 15:12 ` Mike Snitzer
2017-03-30 15:22 ` Martin K. Petersen
[not found] ` <yq1lgrm3i36.fsf-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2017-03-30 15:38 ` Mike Snitzer
2017-03-30 15:38 ` Mike Snitzer
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