Re: [PATCH 25/27] block: remove the discard_zeroes_data flag

always use REQ_OP_WRITE_ZEROES for zeroing offload V2 · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 01/27] sd: split sd_setup_discard_cmnd · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 02/27] block: renumber REQ_OP_WRITE_ZEROES · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 03/27] block: implement splitting of REQ_OP_WRITE_ZEROES bios · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 04/27] sd: implement REQ_OP_WRITE_ZEROES · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 05/27] md: support REQ_OP_WRITE_ZEROES · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 06/27] dm io: discards don't take a payload · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 07/27] dm: support REQ_OP_WRITE_ZEROES · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 08/27] dm kcopyd: switch to use REQ_OP_WRITE_ZEROES · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 09/27] block: stop using blkdev_issue_write_same for zeroing · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 10/27] block: add a flags argument to (__)blkdev_issue_zeroout · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 11/27] block: add a REQ_NOUNMAP flag for REQ_OP_WRITE_ZEROES · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 12/27] block: add a new BLKDEV_ZERO_NOFALLBACK flag · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 13/27] block_dev: use blkdev_issue_zerout for hole punches · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 14/27] sd: implement unmapping Write Zeroes · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 15/27] nvme: implement REQ_OP_WRITE_ZEROES · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 16/27] zram: implement REQ_OP_WRITE_ZEROES · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 17/27] loop: implement REQ_OP_WRITE_ZEROES · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 18/27] brd: remove discard support · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 19/27] rbd: remove the discard_zeroes_data flag · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 20/27] rsxx: remove the discard_zeroes_data flag · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 21/27] mmc: remove the discard_zeroes_data flag · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 22/27] block: stop using discards for zeroing · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 23/27] drbd: make intelligent use of blkdev_issue_zeroout · Christoph Hellwig <hch@lst.de> · 2017-04-05
Re: [Drbd-dev] [PATCH 23/27] drbd: make intelligent use of blkdev_issue_zeroout · Eric Wheeler <hidden> · 2018-01-13
Re: [Drbd-dev] [PATCH 23/27] drbd: make intelligent use of blkdev_issue_zeroout · Lars Ellenberg <lars.ellenberg@linbit.com> · 2018-01-15
Re: [PATCH 23/27] drbd: make intelligent use of blkdev_issue_zeroout · Mike Snitzer <hidden> · 2018-01-15
Re: [Drbd-dev] [PATCH 23/27] drbd: make intelligent use of blkdev_issue_zeroout · Lars Ellenberg <lars.ellenberg@linbit.com> · 2018-01-16
[PATCH 24/27] drbd: implement REQ_OP_WRITE_ZEROES · Christoph Hellwig <hch@lst.de> · 2017-04-05
[PATCH 25/27] block: remove the discard_zeroes_data flag · Christoph Hellwig <hch@lst.de> · 2017-04-05
Re: [PATCH 25/27] block: remove the discard_zeroes_data flag · Bart Van Assche <hidden> · 2017-05-01
Re: [PATCH 25/27] block: remove the discard_zeroes_data flag · Nicholas A. Bellinger <hidden> · 2017-05-02
Re: [PATCH 25/27] block: remove the discard_zeroes_data flag · Nicholas A. Bellinger <hidden> · 2017-05-02
Re: [PATCH 25/27] block: remove the discard_zeroes_data flag · "hch@lst.de" <hch@lst.de> · 2017-05-02
Re: [PATCH 25/27] block: remove the discard_zeroes_data flag · Nicholas A. Bellinger <hidden> · 2017-05-03
Re: [PATCH 25/27] block: remove the discard_zeroes_data flag · Mike Snitzer <hidden> · 2017-05-03
Re: [PATCH 25/27] block: remove the discard_zeroes_data flag · Nicholas A. Bellinger <hidden> · 2017-05-05
Re: [PATCH 25/27] block: remove the discard_zeroes_data flag · "hch@lst.de" <hch@lst.de> · 2017-05-07
Re: [PATCH 25/27] block: remove the discard_zeroes_data flag · Nicholas A. Bellinger <hidden> · 2017-05-09
Re: [PATCH 25/27] block: remove the discard_zeroes_data flag · "hch@lst.de" <hch@lst.de> · 2017-05-10
Re: [PATCH 25/27] block: remove the discard_zeroes_data flag · Nicholas A. Bellinger <hidden> · 2017-05-11
Re: [PATCH 25/27] block: remove the discard_zeroes_data flag · "hch@lst.de" <hch@lst.de> · 2017-05-11
Re: [PATCH 25/27] block: remove the discard_zeroes_data flag · Nicholas A. Bellinger <hidden> · 2017-05-11
[PATCH 26/27] scsi: sd: Separate zeroout and discard command choices · Christoph Hellwig <hch@lst.de> · 2017-04-05
Re: [PATCH 26/27] scsi: sd: Separate zeroout and discard command choices · Hannes Reinecke <hare@suse.de> · 2017-04-06
Re: [PATCH 26/27] scsi: sd: Separate zeroout and discard command choices · Paolo Bonzini <pbonzini@redhat.com> · 2017-04-19
[PATCH 27/27] scsi: sd: Remove LBPRZ dependency for discards · Christoph Hellwig <hch@lst.de> · 2017-04-05
Re: [PATCH 27/27] scsi: sd: Remove LBPRZ dependency for discards · Hannes Reinecke <hare@suse.de> · 2017-04-06
Re: always use REQ_OP_WRITE_ZEROES for zeroing offload V2 · Jens Axboe <axboe@kernel.dk> · 2017-04-08

From: hch-jcswGhMUV9g@public.gmane.org <hidden>
Date: 2017-05-11 06:26:30
Also in: dm-devel, linux-block, linux-scsi

On Wed, May 10, 2017 at 09:50:35PM -0700, Nicholas A. Bellinger wrote:

1) Expose a block_device or request_queue bit to signal 'real LBPRZ'
support up to IBLOCK, in order to maintain SCSI target feature
compatibility.

No way.  If you want to zero use REQ_OP_WRITE_ZEROES..

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