Hi Jens,
The 1st patch add .mq_quiesce_mutex for serializing quiesce/unquiesce,
and prepares for replacing srcu with percpu_ref.
The 2nd patch replaces srcu with percpu_ref.
The 3rd patch adds tagset quiesce interface.
The 4th patch applies tagset quiesce interface for NVMe subsystem.
V8:
- rebase on latest linus tree, only there is small fuzz change on 2/4
V7:
- base on latest for-5.10/block, only there is small change on 2/4
V6:
- base on for-5.10/block directly, instead of being against on patchset of
'percpu_ref & block: reduce memory footprint of percpu_ref in fast path',
because these patches don't depend on that patchset.
V5:
- warn once in case that driver unquiesces its queue being
quiesce and not done, only patch 2 is modified
V4:
- remove .mq_quiesce_mutex, and switch to test_and_[set|clear] for
avoiding duplicated quiesce action
- pass blktests(block, nvme)
V3:
- add tagset quiesce interface
- apply tagset quiesce interface for NVMe
- pass blktests(block, nvme)
V2:
- add .mq_quiesce_lock
- add comment on patch 2 wrt. handling hctx_lock() failure
- trivial patch style change
Ming Lei (3):
block: use test_and_{clear|test}_bit to set/clear QUEUE_FLAG_QUIESCED
blk-mq: implement queue quiesce via percpu_ref for BLK_MQ_F_BLOCKING
blk-mq: add tagset quiesce interface
Sagi Grimberg (1):
nvme: use blk_mq_[un]quiesce_tagset
block/blk-core.c | 13 +++
block/blk-mq-sysfs.c | 2 -
block/blk-mq.c | 182 +++++++++++++++++++++++++--------------
block/blk-sysfs.c | 6 +-
block/blk.h | 2 +
drivers/nvme/host/core.c | 19 ++--
include/linux/blk-mq.h | 10 +--
include/linux/blkdev.h | 4 +
8 files changed, 154 insertions(+), 84 deletions(-)
Cc: Hannes Reinecke <hare@xxxxxxx>
Cc: Sagi Grimberg <sagi@xxxxxxxxxxx>
Cc: Bart Van Assche <bvanassche@xxxxxxx>
Cc: Johannes Thumshirn <Johannes.Thumshirn@xxxxxxx>
Cc: Chao Leng <lengchao@xxxxxxxxxx>
--
2.25.2
