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* [RFC PATCH 0/2] block: support to freeze bio based queue
@ 2021-04-15 10:33 Ming Lei
  2021-04-15 10:33 ` [RFC PATCH 1/2] percpu_ref: add percpu_ref_tryget_many_live Ming Lei
  2021-04-15 10:33 ` [RFC PATCH 2/2] block: support to freeze bio based request queue Ming Lei
  0 siblings, 2 replies; 11+ messages in thread
From: Ming Lei @ 2021-04-15 10:33 UTC (permalink / raw)
  To: Jens Axboe
  Cc: linux-block, Jeffle Xu, Mike Snitzer, dm-devel, linux-raid,
	Song Liu, linux-nvme, Ming Lei

Hello,

For bio based request queue, the queue usage refcnt is only grabbed
during submission, which isn't consistent with request base queue.

Queue freezing has been used widely, and turns out it is very useful
to quiesce queue activity.

So try to support to freeze bio based queue by ->q_usage_counter.

Any comment are welcome!


Ming Lei (2):
  percpu_ref: add percpu_ref_tryget_many_live
  block: support to freeze bio based request queue

 block/bio.c                     | 12 ++++++++++--
 block/blk-core.c                | 23 +++++++++++++++++------
 drivers/nvme/host/core.c        | 16 ++++++++++++++++
 drivers/nvme/host/multipath.c   |  6 ++++++
 include/linux/blk-mq.h          |  2 ++
 include/linux/blk_types.h       |  1 +
 include/linux/blkdev.h          |  7 ++++++-
 include/linux/percpu-refcount.h | 30 ++++++++++++++++++++++++++----
 8 files changed, 84 insertions(+), 13 deletions(-)

-- 
2.29.2


^ permalink raw reply	[flat|nested] 11+ messages in thread

end of thread, other threads:[~2021-04-20  7:59 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-04-15 10:33 [RFC PATCH 0/2] block: support to freeze bio based queue Ming Lei
2021-04-15 10:33 ` [RFC PATCH 1/2] percpu_ref: add percpu_ref_tryget_many_live Ming Lei
2021-04-15 19:50   ` Bart Van Assche
2021-04-15 10:33 ` [RFC PATCH 2/2] block: support to freeze bio based request queue Ming Lei
2021-04-15 13:56   ` Ming Lei
2021-04-15 20:16   ` [dm-devel] " Bart Van Assche
2021-04-16  1:28     ` Ming Lei
2021-04-19 12:05   ` JeffleXu
2021-04-19 13:50     ` Ming Lei
2021-04-20  7:21       ` JeffleXu
2021-04-20  7:58         ` Ming Lei

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