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
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