kernel-hacking-2024-linux-s.../block
Ming Lei 0416f3be58 blk-cgroup: don't update io stat for root cgroup
We source root cgroup stats from the system-wide stats, see blkcg_print_stat
and blkcg_rstat_flush, so don't update io state for root cgroup.

Fixes blkg leak issue introduced in commit 3b8cc62987 ("blk-cgroup: Optimize blkcg_rstat_flush()")
which starts to grab blkg's reference when adding iostat_cpu into percpu
blkcg list, but this state won't be consumed by blkcg_rstat_flush() where
the blkg reference is dropped.

Tested-by: Bart van Assche <bvanassche@acm.org>
Reported-by: Bart van Assche <bvanassche@acm.org>
Fixes: 3b8cc62987 ("blk-cgroup: Optimize blkcg_rstat_flush()")
Cc: Tejun Heo <tj@kernel.org>
Cc: Waiman Long <longman@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230202021804.278582-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2023-02-01 19:26:41 -07:00
..
partitions
badblocks.c
bdev.c block: bdev & blktrace: use consistent function doc. notation 2022-12-01 09:16:46 -07:00
bfq-cgroup.c block, bfq: fix uaf for bfqq in bic_set_bfqq() 2023-01-29 18:57:01 -07:00
bfq-iosched.c block, bfq: fix uaf for bfqq in bic_set_bfqq() 2023-01-29 18:57:01 -07:00
bfq-iosched.h block, bfq: switch 'bfqg->ref' to use atomic refcount apis 2023-01-15 20:53:27 -07:00
bfq-wf2q.c block, bfq: only do counting of pending-request for BFQ_GROUP_IOSCHED 2022-12-15 05:11:59 -07:00
bio-integrity.c
bio.c Revert "block: bio_copy_data_iter" 2023-01-04 14:43:27 -07:00
blk-cgroup-fc-appid.c
blk-cgroup-rwstat.c
blk-cgroup-rwstat.h
blk-cgroup.c blk-cgroup: don't update io stat for root cgroup 2023-02-01 19:26:41 -07:00
blk-cgroup.h blk-cgroup: Optimize blkcg_rstat_flush() 2022-11-16 16:58:44 -07:00
blk-core.c block: Drop spurious might_sleep() from blk_put_queue() 2023-01-08 20:29:28 -07:00
blk-crypto-fallback.c
blk-crypto-internal.h blk-crypto: pass a gendisk to blk_crypto_sysfs_{,un}register 2022-11-30 11:09:00 -07:00
blk-crypto-profile.c blk-crypto: Add a missing include directive 2022-11-23 10:38:54 -07:00
blk-crypto-sysfs.c block: untangle request_queue refcounting from sysfs 2022-11-30 11:09:00 -07:00
blk-crypto.c for-6.2/block-2022-12-08 2022-12-13 10:43:59 -08:00
blk-flush.c
blk-ia-ranges.c block: untangle request_queue refcounting from sysfs 2022-11-30 11:09:00 -07:00
blk-integrity.c
blk-ioc.c
blk-iocost.c block/blk-iocost (gcc13): keep large values in a new enum 2022-12-14 09:56:10 -07:00
blk-iolatency.c
blk-ioprio.c
blk-ioprio.h
blk-lib.c
blk-map.c block: set FOLL_PCI_P2PDMA in bio_map_user_iov() 2022-11-09 11:29:21 -07:00
blk-merge.c block: don't allow splitting of a REQ_NOWAIT bio 2023-01-04 13:24:44 -07:00
blk-mq-cpumap.c
blk-mq-debugfs-zoned.c
blk-mq-debugfs.c
blk-mq-debugfs.h
blk-mq-pci.c
blk-mq-rdma.c
blk-mq-sched.c
blk-mq-sched.h
blk-mq-sysfs.c blk-mq: fix possible memleak when register 'hctx' failed 2022-11-25 06:34:03 -07:00
blk-mq-tag.c
blk-mq-tag.h
blk-mq-virtio.c
blk-mq.c block: Fix the blk_mq_destroy_queue() documentation 2023-01-31 11:46:15 -07:00
blk-mq.h blk-mq: move the srcu_struct used for quiescing to the tagset 2022-11-02 08:35:34 -06:00
blk-pm.c
blk-pm.h
blk-rq-qos.c
blk-rq-qos.h
blk-settings.c for-6.2/block-2022-12-08 2022-12-13 10:43:59 -08:00
blk-stat.c
blk-stat.h
blk-sysfs.c block: untangle request_queue refcounting from sysfs 2022-11-30 11:09:00 -07:00
blk-throttle.c blk-throttle: Use more suitable time_after check for update of slice_start 2022-12-05 13:45:31 -07:00
blk-throttle.h
blk-timeout.c
blk-wbt.c
blk-wbt.h
blk-zoned.c
blk.h for-6.2/block-2022-12-08 2022-12-13 10:43:59 -08:00
bounce.c
bsg-lib.c
bsg.c block: untangle request_queue refcounting from sysfs 2022-11-30 11:09:00 -07:00
disk-events.c
elevator.c block: untangle request_queue refcounting from sysfs 2022-11-30 11:09:00 -07:00
elevator.h
fops.c block: remove blkdev_writepages 2022-11-16 11:32:53 -07:00
genhd.c Revert "block: remove devnode callback from struct block_device_operations" 2023-01-04 14:44:02 -07:00
holder.c block: don't allow a disk link holder to itself 2022-11-16 15:19:56 -07:00
ioctl.c block: Do not reread partition table on exclusively open device 2022-12-01 07:44:03 -07:00
ioprio.c
Kconfig block: Remove "select SRCU" 2023-01-05 08:50:10 -07:00
Kconfig.iosched
kyber-iosched.c
Makefile
mq-deadline.c block: mq-deadline: Rename deadline_is_seq_writes() 2022-11-28 19:27:45 -07:00
opal_proto.h
sed-opal.c for-6.2/block-2022-12-08 2022-12-13 10:43:59 -08:00
t10-pi.c