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From: Kanchan Joshi <[email protected]>
To: [email protected], [email protected], [email protected]
Cc: [email protected], [email protected],
	[email protected], [email protected],
	Kanchan Joshi <[email protected]>
Subject: [PATCH for-next v9 0/7] fixed-buffer for uring-cmd/passthru
Date: Mon, 26 Sep 2022 01:52:57 +0530	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: CGME20220925203314epcas5p2a075d1026db3a46df09a4b67108109b4@epcas5p2.samsung.com

Hi

uring-cmd lacks the ability to leverage the pre-registered buffers.
This series adds that support in uring-cmd, and plumbs nvme passthrough
to work with it.

Patch 3 and 4 contains a bunch of general nvme cleanups, which got added
along the iterations.

Using registered-buffers showed 22-26% hike in peak IOPS (v8,in Jens setup).

Changes since v8:
- Split some patches further; now 7 patches rather than 5 (Christoph)
- Applied a bunch of other suggested cleanups (Christoph)

Changes since v7:
- Patch 3: added many cleanups/refactoring suggested by Christoph
- Patch 4: added copying-pages fallback for bounce-buffer/dma-alignment case
  (Christoph)

Changes since v6:
- Patch 1: fix warning for io_uring_cmd_import_fixed (robot)
-
Changes since v5:
- Patch 4: newly addd, to split a nvme function into two
- Patch 3: folded cleanups in bio_map_user_iov (Chaitanya, Pankaj)
- Rebase to latest for-next

Changes since v4:
- Patch 1, 2: folded all review comments of Jens

Changes since v3:
- uring_cmd_flags, change from u16 to u32 (Jens)
- patch 3, add another helper to reduce code-duplication (Jens)

Changes since v2:
- Kill the new opcode, add a flag instead (Pavel)
- Fix standalone build issue with patch 1 (Pavel)

Changes since v1:
- Fix a naming issue for an exported helper


Anuj Gupta (2):
  io_uring: add io_uring_cmd_import_fixed
  io_uring: introduce fixed buffer support for io_uring_cmd

Kanchan Joshi (5):
  nvme: refactor nvme_add_user_metadata
  nvme: refactor nvme_alloc_request
  block: factor out bio_map_get helper
  block: introduce helper to map bvec iterator
  nvme: wire up fixed buffer support for nvme passthrough

 block/blk-map.c               | 111 ++++++++++++++++++++---
 drivers/nvme/host/ioctl.c     | 160 ++++++++++++++++++++--------------
 include/linux/blk-mq.h        |   1 +
 include/linux/io_uring.h      |  10 ++-
 include/uapi/linux/io_uring.h |   9 ++
 io_uring/uring_cmd.c          |  26 +++++-
 6 files changed, 241 insertions(+), 76 deletions(-)

-- 
2.25.1


       reply	other threads:[~2022-09-25 20:33 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20220925203314epcas5p2a075d1026db3a46df09a4b67108109b4@epcas5p2.samsung.com>
2022-09-25 20:22 ` Kanchan Joshi [this message]
     [not found]   ` <CGME20220925203320epcas5p28fcc3c9ff8669c56213547725ea71001@epcas5p2.samsung.com>
2022-09-25 20:22     ` [PATCH for-next v9 1/7] io_uring: add io_uring_cmd_import_fixed Kanchan Joshi
     [not found]   ` <CGME20220925203325epcas5p1e4e89d414aa7a268a6e526d3c7c2261c@epcas5p1.samsung.com>
2022-09-25 20:22     ` [PATCH for-next v9 2/7] io_uring: introduce fixed buffer support for io_uring_cmd Kanchan Joshi
     [not found]   ` <CGME20220925203328epcas5p1872214ededaf3b75762dcb5af15199da@epcas5p1.samsung.com>
2022-09-25 20:23     ` [PATCH for-next v9 3/7] nvme: refactor nvme_add_user_metadata Kanchan Joshi
     [not found]   ` <CGME20220925203330epcas5p20c712fa919a4cc2a5ec3bbaa94bb72ca@epcas5p2.samsung.com>
2022-09-25 20:23     ` [PATCH for-next v9 4/7] nvme: refactor nvme_alloc_request Kanchan Joshi
     [not found]   ` <CGME20220925203332epcas5p3b080cce759996dec4e081f03e9ecd2f9@epcas5p3.samsung.com>
2022-09-25 20:23     ` [PATCH for-next v9 5/7] block: factor out bio_map_get helper Kanchan Joshi
     [not found]   ` <CGME20220925203336epcas5p39e910479f992d7d9e233210e0647a6bf@epcas5p3.samsung.com>
2022-09-25 20:23     ` [PATCH for-next v9 6/7] block: introduce helper to map bvec iterator Kanchan Joshi
2022-09-26 14:54       ` Christoph Hellwig
     [not found]   ` <CGME20220925203340epcas5p21bd73962a73c36c7bd56841299c0d229@epcas5p2.samsung.com>
2022-09-25 20:23     ` [PATCH for-next v9 7/7] nvme: wire up fixed buffer support for nvme passthrough Kanchan Joshi

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