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From: Bart Van Assche <bvanassche@acm.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
	Bart Van Assche <bvanassche@acm.org>
Subject: [PATCH 00/10] Support DMA segments smaller than the page size
Date: Wed, 19 Oct 2022 15:23:14 -0700	[thread overview]
Message-ID: <20221019222324.362705-1-bvanassche@acm.org> (raw)

Hi Jens,

We (Android team) would like to support storage controllers with a segment size
of 4 KiB in combination with a 16 KiB page size. Hence this patch series that
adds supports for DMA segments smaller than the page size. In addition a few
cleanup patches for the block layer are included. Please consider this patch
series for the kernel v6.2 merge window.

Thanks,

Bart.

Bart Van Assche (10):
  block: Remove request.write_hint
  block: Constify most queue limits pointers
  block: Micro-optimize get_max_segment_size()
  block: Add support for small segments in blk_rq_map_user_iov()
  block: Introduce QUEUE_FLAG_SUB_PAGE_SEGMENTS
  block: Fix the number of segment calculations
  block: Add support for segments smaller than the page size
  scsi: core: Set the SUB_PAGE_SEGMENTS request queue flag
  scsi_debug: Support configuring the maximum segment size
  null_blk: Support configuring the maximum segment size

 block/blk-map.c                   | 43 +++++++++++++++++++++-----
 block/blk-merge.c                 | 50 +++++++++++++++++++------------
 block/blk-mq.c                    |  2 ++
 block/blk-settings.c              | 16 +++++-----
 block/blk.h                       | 17 +++++++----
 drivers/block/null_blk/main.c     | 20 +++++++++++--
 drivers/block/null_blk/null_blk.h |  1 +
 drivers/scsi/scsi_debug.c         |  3 ++
 drivers/scsi/scsi_lib.c           |  2 ++
 include/linux/blk-mq.h            |  1 -
 include/linux/blkdev.h            |  3 ++
 11 files changed, 115 insertions(+), 43 deletions(-)


             reply	other threads:[~2022-10-19 22:23 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-19 22:23 Bart Van Assche [this message]
2022-10-19 22:23 ` [PATCH 01/10] block: Remove request.write_hint Bart Van Assche
2022-10-21  1:59   ` Ming Lei
2022-10-19 22:23 ` [PATCH 02/10] block: Constify most queue limits pointers Bart Van Assche
2022-10-21  2:01   ` Ming Lei
2022-10-19 22:23 ` [PATCH 03/10] block: Micro-optimize get_max_segment_size() Bart Van Assche
2022-10-21  2:17   ` Ming Lei
2022-10-19 22:23 ` [PATCH 04/10] block: Add support for small segments in blk_rq_map_user_iov() Bart Van Assche
2022-10-19 22:23 ` [PATCH 05/10] block: Introduce QUEUE_FLAG_SUB_PAGE_SEGMENTS Bart Van Assche
2022-10-19 22:23 ` [PATCH 06/10] block: Fix the number of segment calculations Bart Van Assche
2022-11-01 17:23   ` Bart Van Assche
2022-11-02  1:22     ` Ming Lei
2022-11-03 19:32       ` Bart Van Assche
2022-10-19 22:23 ` [PATCH 07/10] block: Add support for segments smaller than the page size Bart Van Assche
2022-10-19 22:23 ` [PATCH 08/10] scsi: core: Set the SUB_PAGE_SEGMENTS request queue flag Bart Van Assche
2022-10-19 22:23 ` [PATCH 09/10] scsi_debug: Support configuring the maximum segment size Bart Van Assche
2022-10-19 22:23 ` [PATCH 10/10] null_blk: " Bart Van Assche
2022-10-20 23:13   ` Damien Le Moal
2022-10-20 23:34     ` Bart Van Assche
2022-10-20 23:39       ` Damien Le Moal
2022-10-21  0:39         ` Bart Van Assche

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