linux-kernel - [PATCH v3 0/2] blk-mq: Request queue-wide tags for shared sbitmap

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Date:   Thu, 13 May 2021 20:00:56 +0800
From:   John Garry <john.garry@...wei.com>
To:     <axboe@...nel.dk>
CC:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-scsi@...r.kernel.org>, <ming.lei@...hat.com>,
        <kashyap.desai@...adcom.com>, <chenxiang66@...ilicon.com>,
        <yama@...hat.com>, <dgilbert@...erlog.com>,
        John Garry <john.garry@...wei.com>
Subject: [PATCH v3 0/2] blk-mq: Request queue-wide tags for shared sbitmap

This is v3 of patch/series. I have spun off a new patch for tag allocation
refactoring.

Details are in commit messages.

Changes since v2:
- Spin off separate patch for tag allocation refactoring
- Combine sched shared sbitmap code into a single function

Changes since v1:
- Embed sbitmaps in request_queue struct
- Relocate IO sched functions to blk-mq-sched.c
- Fix error path code

Please retest, thanks! For some reason I could not recreate the original
issue, but I am using qemu...

John Garry (2):
  blk-mq: Some tag allocation code refactoring
  blk-mq: Use request queue-wide tags for tagset-wide sbitmap

 block/blk-mq-sched.c   | 67 ++++++++++++++++++++++++++++++++++--------
 block/blk-mq-sched.h   |  2 ++
 block/blk-mq-tag.c     | 65 +++++++++++++++++++++++-----------------
 block/blk-mq-tag.h     |  9 ++++--
 block/blk-mq.c         | 15 ++++++++--
 include/linux/blkdev.h |  4 +++
 6 files changed, 116 insertions(+), 46 deletions(-)

-- 
2.26.2