Hello Jens,
The 1st 11 patch cleans up elevator change code, and unifying it via single
helper, meantime moves kobject_add/del & debugfs register/unregister out of
queue freezing & elevator_lock. This way fixes many lockdep warnings
reported recently, especially since fs_reclaim is connected with freeze lock
manually by commit ffa1e7ada456 ("block: Make request_queue lockdep splats
show up earlier").
The other 4 ones fixes lockdep warnings from bfq and updating nr_hw_queues
code.
Also the 4th patch fixes kasan warning & oops report from Shinichiro by
preventing elevator switching when updating nr_hw_queues is in-progress.
Thanks,
Ming Lei (15):
block: don't call freeze queue in elevator_switch() and
elevator_disable()
block: add two helpers for registering/un-registering sched debugfs
block: move sched debugfs register into elvevator_register_queue
block: prevent elevator switch during updating nr_hw_queues
block: simplify elevator reset for updating nr_hw_queues
block: add helper of elevator_change()
block: move blk_unregister_queue() & device_del() after freeze wait
block: add `struct elev_change_ctx` for unifying elevator change
block: unifying elevator change
block: pass elevator_queue to elv_register_queue & unregister_queue
block: move elv_register[unregister]_queue out of elevator_lock
block: move debugfs/sysfs register out of freezing queue
block: remove several ->elevator_lock
block: move hctx cpuhp add/del out of queue freezing
block: move wbt_enable_default() out of queue freezing from
scheduler's ->exit()
block/bfq-iosched.c | 2 +-
block/blk-mq-debugfs.c | 13 +--
block/blk-mq-sched.c | 39 +++++---
block/blk-mq.c | 163 +++++++++---------------------
block/blk-sysfs.c | 18 ++--
block/blk.h | 10 +-
block/elevator.c | 221 ++++++++++++++++++++++++++---------------
block/elevator.h | 16 +++
block/genhd.c | 25 +----
include/linux/blk-mq.h | 10 +-
10 files changed, 256 insertions(+), 261 deletions(-)
--
2.47.0
