Ming Lei 6ff18507a7 blk-mq: don't hold q->sysfs_lock in blk_mq_map_swqueue ...

commit c6ba933358 upstream.

blk_mq_map_swqueue() is called from blk_mq_init_allocated_queue()
and blk_mq_update_nr_hw_queues(). For the former caller, the kobject
isn't exposed to userspace yet. For the latter caller, hctx sysfs entries
and debugfs are un-registered before updating nr_hw_queues.

On the other hand, commit 2f8f1336a4 ("blk-mq: always free hctx after
request queue is freed") moves freeing hctx into queue's release
handler, so there won't be race with queue release path too.

So don't hold q->sysfs_lock in blk_mq_map_swqueue().

Cc: Christoph Hellwig <hch@infradead.org>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Mike Snitzer <snitzer@redhat.com>
Cc: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2021-02-13 13:51:15 +01:00

..

partitions

partitions/aix: append null character to print data from disk

2018-07-27 09:17:41 -06:00

badblocks.c

badblocks: fix wrong return value in badblocks_set if badblocks are disabled

2017-11-03 11:29:50 -07:00

bfq-cgroup.c

block, bfq: fix overwrite of bfq_group pointer in bfq_find_set_group()

2020-03-25 08:06:08 +01:00

bfq-iosched.c

bfq: Fix computation of shallow depth

2021-01-19 18:22:36 +01:00

bfq-iosched.h

block, bfq: inject other-queue I/O into seeky idle queues on NCQ flash

2019-11-20 18:46:44 +01:00

bfq-wf2q.c

block, bfq: correctly charge and reset entity service in all cases

2018-11-13 11:08:28 -08:00

bio-integrity.c

block: release bip in a right way in error path

2020-07-16 08:17:23 +02:00

bio.c

block: do not leak memory in bio_copy_user_iov()

2019-04-17 08:38:51 +02:00

blk-cgroup.c

blk-cgroup: Pre-allocate tree node on blkg_conf_prep

2020-11-10 12:35:59 +01:00

blk-core.c

Revert "block: ratelimit handle_bad_sector() message"

2020-11-05 11:08:35 +01:00

blk-exec.c

blk-mq-sched: remove unused 'can_block' arg from blk_mq_sched_insert_request

2018-01-17 09:49:21 -07:00

blk-flush.c

block: fix null pointer dereference in blk_mq_rq_timed_out()

2019-10-05 13:10:08 +02:00

blk-integrity.c

block drivers/block: Use octal not symbolic permissions

2018-05-24 13:38:59 -06:00

blk-ioc.c

block: Fix use-after-free issue accessing struct io_cq

2020-04-17 10:48:41 +02:00

blk-iolatency.c

blk-iolatency: fix STS_AGAIN handling

2019-09-16 08:21:41 +02:00

blk-lib.c

block: fix 32 bit overflow in __blkdev_issue_discard()

2020-02-01 09:37:12 +00:00

blk-map.c

block: fix memleak when __blk_rq_map_user_iov() is failed

2020-01-12 12:17:22 +01:00

blk-merge.c

block: don't use bio->bi_vcnt to figure out segment number

2020-01-27 14:50:23 +01:00

blk-mq-cpumap.c

blk-mq: don't keep offline CPUs mapped to hctx 0

2018-04-10 08:38:46 -06:00

blk-mq-debugfs-zoned.c

block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n

2018-07-09 09:07:52 -06:00

blk-mq-debugfs.c

block, scsi: Change the preempt-only flag into a counter

2019-08-04 09:30:57 +02:00

blk-mq-debugfs.h

block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n

2018-07-09 09:07:52 -06:00

blk-mq-pci.c

blk-mq: code clean-up by adding an API to clear set->mq_map

2018-07-09 09:07:53 -06:00

blk-mq-rdma.c

block: Add rdma affinity based queue mapping helper

2017-08-08 14:58:03 -04:00

blk-mq-sched.c

blk-mq: order adding requests to hctx->dispatch and checking SCHED_RESTART

2020-09-03 11:24:26 +02:00

blk-mq-sched.h

block: mq-deadline: Fix write completion handling

2019-01-13 09:51:07 +01:00

blk-mq-sysfs.c

blk-mq: make sure that line break can be printed

2019-12-17 20:35:48 +01:00

blk-mq-tag.c

blk-mq: Allow blocking queue tag iter callbacks

2018-09-25 20:17:59 -06:00

blk-mq-tag.h

Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block

2017-11-14 15:32:19 -08:00

blk-mq-virtio.c

…

blk-mq.c

blk-mq: don't hold q->sysfs_lock in blk_mq_map_swqueue

2021-02-13 13:51:15 +01:00

blk-mq.h

blk-mq: free hw queue's resource in hctx's release handler

2019-09-16 08:22:13 +02:00

blk-rq-qos.c

blk-wbt: fix performance regression in wbt scale_up/scale_down

2019-10-17 13:45:16 -07:00

blk-rq-qos.h

blk-rq-qos: fix first node deletion of rq_qos_del()

2019-10-29 09:20:09 +01:00

blk-settings.c

block: keep bdi->io_pages in sync with max_sectors_kb for stacked devices

2020-04-17 10:48:39 +02:00

blk-softirq.c

block: fix timeout changes for legacy request drivers

2018-06-19 11:27:18 -06:00

blk-stat.c

blk-stat: export helpers for modifying blk_rq_stat

2018-07-09 09:07:54 -06:00

blk-stat.h

block: deactivate blk_stat timer in wbt_disable_default()

2019-01-13 09:51:06 +01:00

blk-sysfs.c

block: call rq_qos_exit() after queue is frozen

2019-12-01 09:17:06 +01:00

blk-tag.c

Merge tag 'for-linus-20180616' of git://git.kernel.dk/linux-block

2018-06-17 05:37:55 +09:00

blk-throttle.c

blk-throttle: fix zero wait time for iops throttled group

2019-07-26 09:14:30 +02:00

blk-timeout.c

blk-mq: Fix timeout handling in case the timeout handler returns BLK_EH_DONE

2018-06-23 10:25:45 -06:00

blk-wbt.c

blk-wbt: fix performance regression in wbt scale_up/scale_down

2019-10-17 13:45:16 -07:00

blk-wbt.h

block: remove external dependency on wbt_flags

2018-07-09 09:07:54 -06:00

blk-zoned.c

block: Remove a superfluous cast from blkdev_report_zones()

2018-07-09 09:07:52 -06:00

blk.h

block: fix null pointer dereference in blk_mq_rq_timed_out()

2019-10-05 13:10:08 +02:00

bounce.c

block: copy ioprio in __bio_clone_fast() and bounce

2018-12-01 09:37:32 +01:00

bsg-lib.c

block/bsg-lib: use PTR_ERR_OR_ZERO to simplify the flow path

2018-08-01 09:13:03 -06:00

bsg.c

block: bsg: move atomic_t ref_count variable to refcount API

2018-08-27 19:17:02 -06:00

cfq-iosched.c

cfq: Suppress compiler warnings about comparisons

2018-08-07 17:57:13 -06:00

cmdline-parser.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

compat_ioctl.c

compat_ioctl: block: handle BLKREPORTZONE/BLKRESETZONE

2020-01-09 10:19:01 +01:00

deadline-iosched.c

block drivers/block: Use octal not symbolic permissions

2018-05-24 13:38:59 -06:00

elevator.c

block: don't hold q->sysfs_lock in elevator_init_mq

2021-02-13 13:51:15 +01:00

genhd.c

block: fix NULL pointer dereference in register_disk

2021-02-13 13:51:13 +01:00

ioctl.c

block: pass inclusive 'lend' parameter to truncate_inode_pages_range

2018-02-23 15:20:19 -07:00

ioprio.c

block: add ioprio_check_cap function

2018-05-31 10:50:54 -04:00

Kconfig

block: introduce blk-iolatency io controller

2018-07-09 09:07:54 -06:00

Kconfig.iosched

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

kyber-iosched.c

block: kyber: make kyber more friendly with merging

2018-05-30 10:47:40 -06:00

Makefile

block: introduce blk-iolatency io controller

2018-07-09 09:07:54 -06:00

mq-deadline.c

block: mq-deadline: Fix queue restart handling

2019-10-07 18:57:19 +02:00

noop-iosched.c

…

opal_proto.h

block: sed-opal: Set MBRDone on S3 resume path if TPER is MBREnabled

2017-09-11 09:45:52 -06:00

partition-generic.c

block: fix use-after-free on gendisk

2019-05-31 06:46:18 -07:00

scsi_ioctl.c

block: consistently use GFP_NOIO instead of __GFP_NORECLAIM

2018-05-14 08:55:18 -06:00

sed-opal.c

block: sed-opal: fix IOC_OPAL_ENABLE_DISABLE_MBR

2019-05-31 06:46:24 -07:00

t10-pi.c

block: move dif_prepare/dif_complete functions to block layer

2018-07-30 08:27:02 -06:00