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Ming Lei 10f7335e36 blk-mq: don't grab ->q_usage_counter in blk_mq_sched_bio_merge 
blk_mq_sched_bio_merge is only called from blk-mq.c:blk_attempt_bio_merge(),
which is called when queue usage counter is grabbed already:

1) blk_mq_get_new_requests()

2) blk_mq_get_request()
- cached request in current plug owns one queue usage counter

So don't grab ->q_usage_counter in blk_mq_sched_bio_merge(), and more
importantly this nest way causes hang in blk_mq_freeze_queue_wait().

Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211111085134.345235-2-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-11-11 11:52:33 -07:00
..
partitions
for-5.16/bdev-size-2021-10-29
2021-11-01 09:50:37 -07:00
badblocks.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
bdev.c
block: simplify the block device syncing code
2021-10-22 08:36:55 -06:00
bfq-cgroup.c
block, bfq: fix UAF problem in bfqg_stats_init()
2021-10-19 15:18:30 -06:00
bfq-iosched.c
blk-mq: Stop using pointers for blk_mq_tags bitmap tags
2021-10-18 06:17:03 -06:00
bfq-iosched.h
block, bfq: cleanup the repeated declaration
2021-08-25 06:45:33 -06:00
bfq-wf2q.c
block: Introduce IOPRIO_NR_LEVELS
2021-08-18 07:21:12 -06:00
bio-integrity.c
block: convert the rest of block to bdev_get_queue
2021-10-18 06:17:37 -06:00
bio.c
block: avoid extra iter advance with async iocb
2021-10-27 06:54:58 -06:00
blk-cgroup-rwstat.c
blk-cgroup: Fix the recursive blkg rwstat
2021-03-05 11:32:15 -07:00
blk-cgroup-rwstat.h
blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT
2019-11-07 12:28:13 -07:00
blk-cgroup.c
blk-cgroup: synchronize blkg creation against policy deactivation
2021-10-25 08:06:27 -06:00
blk-core.c
for-5.16/block-2021-11-09
2021-11-09 11:20:07 -08:00
blk-crypto-fallback.c
blk-crypto: rename blk_keyslot_manager to blk_crypto_profile
2021-10-21 10:49:32 -06:00
blk-crypto-internal.h
block: move struct request to blk-mq.h
2021-10-18 06:17:02 -06:00
blk-crypto-profile.c
blk-crypto: rename blk_keyslot_manager to blk_crypto_profile
2021-10-21 10:49:32 -06:00
blk-crypto.c
blk-crypto: rename blk_keyslot_manager to blk_crypto_profile
2021-10-21 10:49:32 -06:00
blk-exec.c
block: add a struct io_comp_batch argument to fops->iopoll()
2021-10-18 14:40:40 -06:00
blk-flush.c
blk-mq: don't handle non-flush requests in blk_insert_flush
2021-10-19 11:10:09 -06:00
blk-ia-ranges.c
block: fix kerneldoc for disk_register_independent_access__ranges()
2021-11-11 11:52:30 -07:00
blk-integrity.c
blk-crypto: rename blk_keyslot_manager to blk_crypto_profile
2021-10-21 10:49:32 -06:00
blk-ioc.c
block: remove retry loop in ioc_release_fn()
2020-07-16 10:22:15 -06:00
blk-iocost.c
block: convert the rest of block to bdev_get_queue
2021-10-18 06:17:37 -06:00
blk-iolatency.c
mm: don't include <linux/blk-cgroup.h> in <linux/backing-dev.h>
2021-10-18 06:17:01 -06:00
blk-ioprio.c
block: Introduce the ioprio rq-qos policy
2021-06-21 15:03:40 -06:00
blk-ioprio.h
block: Introduce the ioprio rq-qos policy
2021-06-21 15:03:40 -06:00
blk-lib.c
block: export blk_next_bio()
2021-06-17 15:51:20 +02:00
blk-map.c
Merge branch 'akpm' (patches from Andrew)
2021-09-03 10:08:28 -07:00
blk-merge.c
blk-mq: only try to run plug merge if request has same queue with incoming bio
2021-11-03 09:27:57 -06:00
blk-mq-cpumap.c
blk-mq: remove the calling of local_memory_node()
2020-10-20 07:08:17 -06:00
blk-mq-debugfs-zoned.c
block: Cleanup license notice
2019-01-17 21:21:40 -07:00
blk-mq-debugfs.c
for-5.16/block-2021-11-09
2021-11-09 11:20:07 -08:00
blk-mq-debugfs.h
blk-mq: no need to check return value of debugfs_create functions
2019-06-13 03:00:30 -06:00
blk-mq-pci.c
block: Fix blk_mq_*_map_queues() kernel-doc headers
2019-05-31 15:12:34 -06:00
blk-mq-rdma.c
block: Fix blk_mq_*_map_queues() kernel-doc headers
2019-05-31 15:12:34 -06:00
blk-mq-sched.c
blk-mq: don't grab ->q_usage_counter in blk_mq_sched_bio_merge
2021-11-11 11:52:33 -07:00
blk-mq-sched.h
block: clean up blk_mq_submit_bio() merging
2021-10-21 08:27:17 -06:00
blk-mq-sysfs.c
block: remove blk-mq-sysfs dead code
2021-08-02 13:37:29 -06:00
blk-mq-tag.c
blk-mq: Fix blk_mq_tagset_busy_iter() for shared tags
2021-10-21 08:21:52 -06:00
blk-mq-tag.h
block: move blk_mq_tag_to_rq() inline
2021-10-19 05:55:41 -06:00
blk-mq-virtio.c
blk-mq: Fix typo in comment
2020-03-17 20:55:21 +01:00
blk-mq.c
for-5.16/block-2021-11-09
2021-11-09 11:20:07 -08:00
blk-mq.h
block: use enum type for blk_mq_alloc_data->rq_flags
2021-11-09 19:19:15 -07:00
blk-pm.c
scsi: block: Fix a race in the runtime power management code
2020-12-09 11:41:41 -05:00
blk-pm.h
block: Remove unused blk_pm_*() function definitions
2021-02-22 06:33:48 -07:00
blk-rq-qos.c
rq-qos: fix missed wake-ups in rq_qos_throttle try two
2021-06-08 15:12:57 -06:00
blk-rq-qos.h
block: only mark bio as tracked if it really is tracked
2021-10-18 08:50:47 -06:00
blk-settings.c
block: Fix partition check for host-aware zoned block devices
2021-10-27 06:58:01 -06:00
blk-stat.c
blk-stat: make q->stats->lock irqsafe
2020-09-01 16:48:46 -06:00
blk-stat.h
block: deactivate blk_stat timer in wbt_disable_default()
2018-12-12 06:47:51 -07:00
blk-sysfs.c
block: Add independent access ranges support
2021-10-26 20:36:47 -06:00
blk-throttle.c
block: convert the rest of block to bdev_get_queue
2021-10-18 06:17:37 -06:00
blk-throttle.h
block: move blk-throtl fast path inline
2021-10-18 06:17:03 -06:00
blk-timeout.c
block: blk-timeout: delete duplicated word
2020-07-31 16:29:47 -06:00
blk-wbt.c
blk-wbt: prevent NULL pointer dereference in wb_timer_fn
2021-10-19 06:13:41 -06:00
blk-wbt.h
blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled()
2021-06-21 15:03:41 -06:00
blk-zoned.c
blk-zoned: allow BLKREPORTZONE without CAP_SYS_ADMIN
2021-08-24 10:12:36 -06:00
blk.h
block: move queue enter logic into blk_mq_submit_bio()
2021-11-04 23:20:10 -06:00
bounce.c
mm: don't include <linux/blk-cgroup.h> in <linux/backing-dev.h>
2021-10-18 06:17:01 -06:00
bsg-lib.c
bsg-lib: initialize the bsg_job in bsg_transport_sg_io_fn
2021-10-22 08:33:57 -06:00
bsg.c
scsi: bsg: Fix device unregistration
2021-09-14 00:22:15 -04:00
disk-events.c
block: return errors from disk_alloc_events
2021-08-23 12:55:45 -06:00
elevator.c
blk-mq: Change shared sbitmap naming to shared tags
2021-10-18 06:17:03 -06:00
elevator.h
block: move elevator.h to block/
2021-10-18 06:17:01 -06:00
fops.c
for-5.16/bdev-size-2021-11-09
2021-11-09 11:16:20 -08:00
genhd.c
block: add __must_check for *add_disk*() callers
2021-11-09 19:19:34 -07:00
holder.c
block: drop unused includes in <linux/genhd.h>
2021-10-18 06:17:02 -06:00
ioctl.c
block: Hold invalidate_lock in BLKZEROOUT ioctl
2021-11-09 12:41:12 -07:00
ioprio.c
block: fix default IO priority handling
2021-08-18 07:23:15 -06:00
Kconfig
block: move menu "Partition type" to block/partitions/Kconfig
2021-10-18 06:17:35 -06:00
Kconfig.iosched
block: simplify Kconfig files
2021-10-18 06:17:35 -06:00
kyber-iosched.c
blk-mq: Stop using pointers for blk_mq_tags bitmap tags
2021-10-18 06:17:03 -06:00
Makefile
block: Add independent access ranges support
2021-10-26 20:36:47 -06:00
mq-deadline.c
blk-mq: Stop using pointers for blk_mq_tags bitmap tags
2021-10-18 06:17:03 -06:00
opal_proto.h
block: sed-opal: Change the check condition for regular session validity
2020-03-12 08:00:10 -06:00
sed-opal.c
block: sed-opal: Change the check condition for regular session validity
2020-03-12 08:00:10 -06:00
t10-pi.c
block: move integrity handling out of <linux/blkdev.h>
2021-10-18 06:17:02 -06:00