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[v4,0/2] cancel all throttled bios in del_gendisk()

Message ID 20211202130440.1943847-1-yukuai3@huawei.com (mailing list archive)
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Series cancel all throttled bios in del_gendisk() | expand

Message

Yu Kuai Dec. 2, 2021, 1:04 p.m. UTC 
If del_gendisk() is done when some io are still throttled, such io
will not be handled until the throttle is done, which is not
necessary.

Changes in v2:
 - move WARN_ON_ONCE() from throtl_rb_first() to it's caller
 - merge some patches into one.

Changes in v3:
 - some code optimization in patch 1
 - hold queue lock to cancel bios in patch 2

Changes in v4:
 - delete rcu_read_lock() and rcu_read_unlock() in patch 2

Yu Kuai (2):
  blk-throtl: move WARN_ON_ONCE() from throtl_rb_first() to it's caller
  block: cancel all throttled bios in del_gendisk()

 block/blk-throttle.c | 74 ++++++++++++++++++++++++++++++++++++++++++--
 block/blk-throttle.h |  2 ++
 block/genhd.c        |  2 ++
 3 files changed, 75 insertions(+), 3 deletions(-)