[PATCH V3 0/3] block/dm: support bio polling

From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@kernel.dk>, Mike Snitzer <snitzer@redhat.com>
Cc: linux-block@vger.kernel.org,
	Jeffle Xu <jefflexu@linux.alibaba.com>,
	dm-devel@redhat.com, Hannes Reinecke <hare@suse.de>,
	Christoph Hellwig <hch@lst.de>, Ming Lei <ming.lei@redhat.com>
Subject: [PATCH V3 0/3] block/dm: support bio polling
Date: Wed, 23 Jun 2021 15:40:29 +0800	[thread overview]
Message-ID: <20210623074032.1484665-1-ming.lei@redhat.com> (raw)

Hello Guys,

Based on Christoph's bio based polling model[1], implement DM bio polling
with one very simple approach.

Patch 1 adds helper of blk_queue_poll().

Patch 2 adds .bio_poll() callback to block_device_operations, so bio
driver can implement its own logic for io polling.

Patch 3 implements bio polling for device mapper.

V3:
	- patch style change as suggested by Christoph(2/3)
	- fix kernel panic issue caused by nested dm polling, which is found
	  & figured out by Jeffle Xu (3/3)
	- re-organize setup polling code (3/3)
	- remove RFC

V2:
	- drop patch to add new fields into bio
	- support io polling for dm native bio splitting
	- add comment

Ming Lei (3):
  block: add helper of blk_queue_poll
  block: add ->poll_bio to block_device_operations
  dm: support bio polling

 block/blk-core.c         |  18 +++---
 block/blk-sysfs.c        |   4 +-
 block/genhd.c            |   2 +
 drivers/md/dm-table.c    |  24 +++++++
 drivers/md/dm.c          | 131 ++++++++++++++++++++++++++++++++++++++-
 drivers/nvme/host/core.c |   2 +-
 include/linux/blkdev.h   |   2 +
 7 files changed, 170 insertions(+), 13 deletions(-)

-- 
2.31.1