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Jan Kara 09df6a75ff bfq: Fix warning in bfqq_request_over_limit() 
People are occasionally reporting a warning bfqq_request_over_limit()
triggering reporting that BFQ's idea of cgroup hierarchy (and its depth)
does not match what generic blkcg code thinks. This can actually happen
when bfqq gets moved between BFQ groups while bfqq_request_over_limit()
is running. Make sure the code is safe against BFQ queue being moved to
a different BFQ group.

Fixes: 76f1df88bbc2 ("bfq: Limit number of requests consumed by each cgroup")
CC: stable@vger.kernel.org
Link: https://lore.kernel.org/all/CAJCQCtTw_2C7ZSz7as5Gvq=OmnDiio=HRkQekqWpKot84sQhFA@mail.gmail.com/
Reported-by: Chris Murphy <lists@colorremedies.com>
Reported-by: "yukuai (C)" <yukuai3@huawei.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20220407140738.9723-1-jack@suse.cz
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-29 06:45:37 -06:00
..
partitions
block: remove genhd.h
2022-02-02 07:49:59 -07:00
badblocks.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
bdev.c
Merge branch 'akpm' (patches from Andrew)
2022-03-22 16:11:53 -07:00
bfq-cgroup.c
block, bfq: don't move oom_bfqq
2022-02-18 06:13:00 -07:00
bfq-iosched.c
bfq: Fix warning in bfqq_request_over_limit()
2022-04-29 06:45:37 -06:00
bfq-iosched.h
block, bfq: cleanup bfq_bfqq_to_bfqg()
2022-02-18 06:13:00 -07:00
bfq-wf2q.c
block, bfq: cleanup bfq_bfqq_to_bfqg()
2022-02-18 06:13:00 -07:00
bio-integrity.c
for-5.18/block-2022-03-18
2022-03-21 16:48:55 -07:00
bio.c
block: fix offset/size check in bio_trim()
2022-04-14 10:15:24 -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
block: partition include/linux/blk-cgroup.h
2022-02-11 10:02:41 -07:00
blk-cgroup.c
for-5.18/block-2022-04-01
2022-04-01 16:20:00 -07:00
blk-cgroup.h
block: don't merge across cgroup boundaries if blkcg is enabled
2022-03-14 19:14:37 -06:00
blk-core.c
SCSI misc on 20220324
2022-03-24 19:37:53 -07:00
blk-crypto-fallback.c
block: remove the per-bio/request write hint
2022-03-07 12:45:57 -07:00
blk-crypto-internal.h
blk-crypto: show crypto capabilities in sysfs
2022-02-28 06:40:23 -07:00
blk-crypto-profile.c
blk-crypto: remove blk_crypto_unregister()
2021-11-29 06:38:51 -07:00
blk-crypto-sysfs.c
blk-crypto: show crypto capabilities in sysfs
2022-02-28 06:40:23 -07:00
blk-crypto.c
blk-crypto: show crypto capabilities in sysfs
2022-02-28 06:40:23 -07:00
blk-flush.c
block: pass a block_device and opf to bio_init
2022-02-02 07:49:59 -07:00
blk-ia-ranges.c
block: fix memory leak in disk_register_independent_access_ranges
2022-01-23 09:13:09 -07:00
blk-integrity.c
blk-crypto: remove blk_crypto_unregister()
2021-11-29 06:38:51 -07:00
blk-ioc.c
block: restore the old set_task_ioprio() behaviour wrt PF_EXITING
2022-03-28 06:34:11 -06:00
blk-iocost.c
iocost: don't reset the inuse weight of under-weighted debtors
2022-04-27 08:41:11 -06:00
blk-iolatency.c
block: fix rq-qos breakage from skipping rq_qos_done_bio()
2022-03-14 14:23:13 -06:00
blk-ioprio.c
block: partition include/linux/blk-cgroup.h
2022-02-11 10:02:41 -07:00
blk-ioprio.h
block: Introduce the ioprio rq-qos policy
2021-06-21 15:03:40 -06:00
blk-lib.c
SCSI misc on 20220324
2022-03-24 19:37:53 -07:00
blk-map.c
block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern
2022-02-17 07:54:03 -07:00
blk-merge.c
for-5.18/write-streams-2022-03-18
2022-03-26 11:51:46 -07:00
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-5.18/write-streams-2022-03-18
2022-03-26 11:51:46 -07:00
blk-mq-debugfs.h
blk-mq: manage hctx map via xarray
2022-03-08 19:39:38 -07:00
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
block: limit request dispatch loop duration
2022-03-17 20:31:43 -06:00
blk-mq-sched.h
block: move blk_mq_sched_assign_ioc to blk-ioc.c
2021-11-29 06:41:29 -07:00
blk-mq-sysfs.c
blk-mq: prepare for implementing hctx table via xarray
2022-03-08 17:57:19 -07:00
blk-mq-tag.c
blk-mq: manage hctx map via xarray
2022-03-08 19:39:38 -07:00
blk-mq-tag.h
blk-mq: Delete busy_iter_fn
2021-12-06 13:18:47 -07:00
blk-mq-virtio.c
blk-mq: Fix typo in comment
2020-03-17 20:55:21 +01:00
blk-mq.c
Revert "block: inherit request start time from bio for BLK_CGROUP"
2022-04-27 13:51:28 -06:00
blk-mq.h
blk-mq: manage hctx map via xarray
2022-03-08 19:39:38 -07:00
blk-pm.c
scsi: block: pm: Always set request queue runtime active in blk_post_runtime_resume()
2021-12-22 23:38:29 -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: fix rq-qos breakage from skipping rq_qos_done_bio()
2022-03-14 14:23:13 -06:00
blk-settings.c
scsi: block: Remove REQ_OP_WRITE_SAME support
2022-02-22 21:11:08 -05:00
blk-stat.c
block: make queue stat accounting a reference
2021-12-14 17:23:05 -07:00
blk-stat.h
block: make queue stat accounting a reference
2021-12-14 17:23:05 -07:00
blk-sysfs.c
SCSI misc on 20220324
2022-03-24 19:37:53 -07:00
blk-throttle.c
block: cancel all throttled bios in del_gendisk()
2022-03-18 09:57:56 -06:00
blk-throttle.h
block: cancel all throttled bios in del_gendisk()
2022-03-18 09:57:56 -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: remove wbt_track stub
2022-03-31 12:58:38 -06:00
blk-zoned.c
SCSI misc on 20220324
2022-03-24 19:37:53 -07:00
blk.h
SCSI misc on 20220324
2022-03-24 19:37:53 -07:00
bounce.c
for-5.18/write-streams-2022-03-18
2022-03-26 11:51:46 -07:00
bsg-lib.c
block: remove the gendisk argument to blk_execute_rq
2021-11-29 06:41:29 -07:00
bsg.c
scsi: bsg: Fix device unregistration
2021-09-14 00:22:15 -04:00
disk-events.c
block: remove genhd.h
2022-02-02 07:49:59 -07:00
elevator.c
for-5.18/block-2022-03-18
2022-03-21 16:48:55 -07:00
elevator.h
block: move elevator.h to block/
2021-10-18 06:17:01 -06:00
fops.c
for-5.18/write-streams-2022-03-18
2022-03-26 11:51:46 -07:00
genhd.c
for-5.18/block-2022-04-01
2022-04-01 16:20:00 -07:00
holder.c
block: remove genhd.h
2022-02-02 07:49:59 -07:00
ioctl.c
block/compat_ioctl: fix range check in BLKGETSIZE
2022-04-15 06:32:40 -06:00
ioprio.c
for-5.17/block-2022-01-11
2022-01-12 10:26:52 -08:00
Kconfig
block: add pi for extended integrity
2022-03-07 12:48:35 -07:00
Kconfig.iosched
block: only build the icq tracking code when needed
2021-12-16 10:59:02 -07:00
kyber-iosched.c
block: make queue stat accounting a reference
2021-12-14 17:23:05 -07:00
Makefile
blk-crypto: show crypto capabilities in sysfs
2022-02-28 06:40:23 -07:00
mq-deadline.c
block: fix async_depth sysfs interface for mq-deadline
2022-01-20 10:54:02 -07:00
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: remove genhd.h
2022-02-02 07:49:59 -07:00
t10-pi.c
block: add pi for extended integrity
2022-03-07 12:48:35 -07:00