Hi, Please review and/or test. Thanks. Available via git here: https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git/log/?h=dm-6.4-dev3 Diffstat from v2 to v3: git diff dm/dm-6.4-dev2 dm/dm-6.4-dev3 | diffstat dm-bio-prison-v1.c | 80 ++++++++++-------- dm-bio-prison-v1.h | 5 + dm-bufio.c | 226 ++++++++++++++++++++++++++++------------------------- dm-thin.c | 29 ++++-- dm.h | 10 ++ 5 files changed, 197 insertions(+), 153 deletions(-) Changes from v2 to v3: - fixed inconsistent braces in conditionals and other whitespace nits in response to the quick review Jens offered on v2 - also fixed struct layout Jens noted, so locks and data they protect are on the same cacheline - split v2's really large dm-bufio-improve-concurrent-IO-performance patch to be 4 patches (patches 5-8) - removed the (ab)use of BUG_ON in most of dm-bufio.c (in preliminary patches 2-4 and also within patches 5-7) - removed the bio-prison-v1.c's BUG_ON (introduced in patch 14) in favor of higher level dm-thin.c code checking when it builds the prison key (allowing for graceful error handling), in patch 15. - introduced dm_num_sharded_locks and use it to remove the "NR_LOCKS" magic value (64) used to split locks in both dm-bio-prison-v1 and dm-bufio (patches 16-20). Changes from v1 to v2: - fixed dm-thin to properly split discards to respect dm-bio-prison-v1's BIO_PRISON_MAX_RANGE limit Joe Thornber (7): dm bufio: remove unused dm_bufio_release_move interface dm bufio: add LRU abstraction dm bufio: add dm_buffer_cache abstraction dm bufio: improve concurrent IO performance dm bufio: add lock_history optimization for cache iterators dm thin: speed up cell_defer_no_holder() dm bio prison v1: improve concurrent IO performance Mike Snitzer (11): dm bufio: use WARN_ON in dm_bufio_client_destroy and dm_bufio_exit dm bufio: never crash if dm_bufio_in_request() dm bufio: don't bug for clear developer oversight dm bufio: move dm_bufio_client members to avoid spanning cachelines dm: split discards further if target sets max_discard_granularity dm bio prison v1: add dm_cell_key_has_valid_range dm: add dm_num_sharded_locks() dm bufio: prepare to intelligently size dm_buffer_cache's buffer_trees dm bufio: intelligently size dm_buffer_cache's buffer_trees dm bio prison v1: prepare to intelligently size dm_bio_prison's prison_regions dm bio prison v1: intelligently size dm_bio_prison's prison_regions Mikulas Patocka (2): dm bufio: use waitqueue_active in __free_buffer_wake dm bufio: use multi-page bio vector drivers/md/dm-bio-prison-v1.c | 93 +- drivers/md/dm-bio-prison-v1.h | 15 + drivers/md/dm-bufio.c | 1988 +++++++++++++++++++++++---------- drivers/md/dm-thin.c | 125 ++- drivers/md/dm.c | 25 +- drivers/md/dm.h | 10 + include/linux/device-mapper.h | 6 + include/linux/dm-bufio.h | 6 - include/uapi/linux/dm-ioctl.h | 4 +- 9 files changed, 1558 insertions(+), 714 deletions(-) -- 2.40.0
