From: Bart Van Assche <Bart.VanAssche@sandisk.com>
To: "hch@infradead.org" <hch@infradead.org>,
"snitzer@redhat.com" <snitzer@redhat.com>
Cc: "linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"agk@redhat.com" <agk@redhat.com>,
"linux-raid@vger.kernel.org" <linux-raid@vger.kernel.org>,
"hch@lst.de" <hch@lst.de>,
"martin.petersen@oracle.com" <martin.petersen@oracle.com>,
"philipp.reisner@linbit.com" <philipp.reisner@linbit.com>,
"axboe@kernel.dk" <axboe@kernel.dk>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"drbd-dev@lists.linbit.com" <drbd-dev@lists.linbit.com>,
"shli@kernel.org" <shli@kernel.org>,
"dm-devel@redhat.com" <dm-devel@redhat.com>
Subject: Re: [Drbd-dev] RFC: always use REQ_OP_WRITE_ZEROES for zeroing offload
Date: Mon, 27 Mar 2017 15:08:16 +0000 [thread overview]
Message-ID: <1490627281.2461.4.camel@sandisk.com> (raw)
In-Reply-To: <20170327140307.GA13020@redhat.com>
On Mon, 2017-03-27 at 10:03 -0400, Mike Snitzer wrote:
> As for the blkdev_issue_zeroout() resorting to manually zeroing the
> range, if the discard fails or dzd not supported, that certainly
> requires DM thinp to implement manual zeroing of the head and tail of
> the range if partial blocks are being zeroed. So I welcome any advances
> there. It is probably something that is best left to Joe or myself to
> tackle. But I'll gladly accept patches ;)
Some time ago I posted a patch series for the block layer that zeroes
start and tail for nonaligned discard requests if dzd has been set. See
also "[PATCH v3 0/5] Make blkdev_issue_discard() submit aligned discard
requests" (https://www.spinics.net/lists/linux-block/msg02360.html).
Bart.
next prev parent reply other threads:[~2017-03-27 15:08 UTC|newest]
Thread overview: 70+ 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
[not found] ` <1490717553.2573.4.camel-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2017-03-30 8:53 ` hch-jcswGhMUV9g
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
[not found] ` <1490726988.2573.16.camel-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2017-03-28 19:33 ` Mike Snitzer
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 16:53 ` 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
2017-03-23 15:10 ` Mike Snitzer
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
[not found] ` <1490719834.2573.9.camel-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2017-03-30 8:59 ` hch-jcswGhMUV9g
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
2017-03-29 14:57 ` Paolo Bonzini
[not found] ` <1490719722.2573.8.camel-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2017-03-30 9:02 ` hch-jcswGhMUV9g
[not found] ` <20170330090201.GD12015-jcswGhMUV9g@public.gmane.org>
2017-03-30 15:28 ` Martin K. Petersen
2017-03-30 17:30 ` hch
[not found] ` <20170330173020.GB24229-jcswGhMUV9g@public.gmane.org>
2017-03-31 2:19 ` Martin K. Petersen
[not found] ` <yq17f36yypg.fsf-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2017-03-31 7:18 ` hch-jcswGhMUV9g
2017-03-23 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 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
[not found] ` <20170330134957.GA508-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
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 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
2017-03-29 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 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 17:02 ` Mike Snitzer
[not found] ` <20170323170221.GA20854-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
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
[not found] ` <20170327091056.GB6879-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
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 15:08 ` Bart Van Assche [this message]
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
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