On Mon, Feb 28, 2022 at 11:27:44AM -0500, Mike Snitzer wrote: > On Wed, Jun 23 2021 at 3:40P -0400, > Ming Lei <ming.lei@xxxxxxxxxx> wrote: > > > 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 > > > > Hey Ming, > > I'd like us to follow-through with adding bio-based polling support. > Kind of strange none of us that were sent this V3 ever responded, > sorry about that! > > Do you have interest in rebasing this patchset (against linux-dm.git's > "dm-5.18" branch since there has been quite some churn)? Or are you > OK with me doing the rebase? Hi Mike, Actually I have one local v5.17 rebase: https://github.com/ming1/linux/tree/my_v5.17-dm-io-poll Also one for-5.18/block rebase which is done just now: https://github.com/ming1/linux/tree/my_v5.18-dm-bio-poll In my previous test on v5.17 rebase, the IOPS improvement is a bit small, so I didn't post it out. Recently not get time to investigate the performance further, so please feel free to work on it. Thanks, Ming
