Tejun Heo
3f91687e6e
block: don't merge across cgroup boundaries if blkcg is enabled ...
commit 6b2b04590b51aa4cf395fcd185ce439cab5961dc upstream.
blk-iocost and iolatency are cgroup aware rq-qos policies but they didn't
disable merges across different cgroups. This obviously can lead to
accounting and control errors but more importantly to priority inversions -
e.g. an IO which belongs to a higher priority cgroup or IO class may end up
getting throttled incorrectly because it gets merged to an IO issued from a
low priority cgroup.
Fix it by adding blk_cgroup_mergeable() which is called from merge paths and
rejects cross-cgroup and cross-issue_as_root merges.
Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: d706751215stable@vger.kernel.org # v4.19+
Cc: Josef Bacik <jbacik@fb.com>
Link: https://lore.kernel.org/r/Yi/eE/6zFNyWJ+qd@slm.duckdns.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-15 14:18:01 +02:00
bfq: fix blkio cgroup leakage v4
2020-09-03 11:26:54 +02:00
block/wbt: fix negative inflight counter when remove scsi device
2022-02-23 11:59:59 +01:00
bfq: fix blkio cgroup leakage v4
2020-09-03 11:26:54 +02:00
bfq: fix blkio cgroup leakage v4
2020-09-03 11:26:54 +02:00
block: bio-integrity: Advance seed correctly for larger interval sizes
2022-02-08 18:24:28 +01:00
block: Fix wrong offset in bio_truncate()
2022-02-01 17:24:39 +01:00
blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd
2021-09-30 10:09:25 +02:00
Revert "Revert "block: end bio with BLK_STS_AGAIN in case of non-mq devs and REQ_NOWAIT""
2021-02-07 15:35:47 +01:00
block: Fix fsync always failed if once failed
2022-03-08 19:07:47 +01:00
blk-iocost: ioc_pd_free() shouldn't assume irq disabled
2020-09-09 19:12:35 +02:00
blk-iolatency: error out if blk_get_queue() failed in iolatency_set_limit()
2021-08-12 13:20:58 +02:00
block: don't merge across cgroup boundaries if blkcg is enabled
2022-04-15 14:18:01 +02:00
kyber: fix out of bounds access when preempted
2021-05-19 10:08:30 +02:00
block: only call sched requeue_request() for scheduled requests
2020-09-23 12:40:37 +02:00
blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue
2020-10-29 09:57:34 +01:00
block: remove inaccurate requeue check
2021-11-17 09:48:31 +01:00
scsi: block: Fix a race in the runtime power management code
2021-01-06 14:48:37 +01:00
rq-qos: fix missed wake-ups in rq_qos_throttle try two
2021-07-19 08:53:16 +02:00
block: fix race between adding/removing rq qos and normal IO
2021-07-14 16:53:18 +02:00
blk-settings: align max_sectors on "logical_block_size" boundary
2021-03-04 10:26:40 +01:00
blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue
2020-10-29 09:57:34 +01:00
blk-throttle: fix UAF by deleteing timer in blk_throtl_exit()
2021-09-26 14:07:13 +02:00
blk-wbt: make sure throttle is enabled properly
2021-07-14 16:53:25 +02:00
blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled()
2021-07-14 16:53:25 +02:00
blk-zoned: allow BLKREPORTZONE without CAP_SYS_ADMIN
2021-09-22 12:26:19 +02:00
scsi: bsg: Remove support for SCSI_IOCTL_SEND_COMMAND
2021-09-22 12:26:23 +02:00
block/wbt: fix negative inflight counter when remove scsi device
2022-02-23 11:59:59 +01:00
block: Suppress uevent for hidden device when removed
2021-03-30 14:35:23 +02:00
block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2)
2021-12-14 14:49:02 +01:00
kyber: fix out of bounds access when preempted
2021-05-19 10:08:30 +02:00
kyber: fix out of bounds access when preempted
2021-05-19 10:08:30 +02:00
3f91687e6e