Julian Sun 8f5845e074 block: restore default wbt enablement ... The commit 245618f8e4 ("block: protect wbt_lat_usec using q->elevator_lock") protected wbt_enable_default() with q->elevator_lock; however, it also placed wbt_enable_default() before blk_queue_flag_set(QUEUE_FLAG_REGISTERED, q);, resulting in wbt failing to be enabled. Moreover, the protection of wbt_enable_default() by q->elevator_lock was removed in commit 78c271344b ("block: move wbt_enable_default() out of queue freezing from sched ->exit()"), so we can directly fix this issue by placing wbt_enable_default() after blk_queue_flag_set(QUEUE_FLAG_REGISTERED, q);. Additionally, this issue also causes the inability to read the wbt_lat_usec file, and the scenario is as follows: root@q:/sys/block/sda/queue# cat wbt_lat_usec cat: wbt_lat_usec: Invalid argument root@q:/data00/sjc/linux# ls /sys/kernel/debug/block/sda/rqos cannot access '/sys/kernel/debug/block/sda/rqos': No such file or directory root@q:/data00/sjc/linux# find /sys -name wbt /sys/kernel/debug/tracing/events/wbt After testing with this patch, wbt can be enabled normally. Signed-off-by: Julian Sun <sunjunchao@bytedance.com> Cc: stable@vger.kernel.org Fixes: 245618f8e4 ("block: protect wbt_lat_usec using q->elevator_lock") Reviewed-by: Nilay Shroff <nilay@linux.ibm.com> Reviewed-by: Yu Kuai <yukuai3@huawei.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20250812154257.57540-1-sunjunchao@bytedance.com Signed-off-by: Jens Axboe <axboe@kernel.dk>		2025-08-13 05:33:48 -06:00
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partitions	…
Kconfig	…
Kconfig.iosched	…
Makefile	…
badblocks.c	…
bdev.c	…
bfq-cgroup.c	…
bfq-iosched.c	block, bfq: remove redundant __GFP_NOWARN	2025-08-11 07:59:22 -06:00
bfq-iosched.h	lib/sbitmap: convert shallow_depth from one word to the whole sbitmap	2025-08-07 06:30:17 -06:00
bfq-wf2q.c	…
bio-integrity-auto.c	…
bio-integrity.c	…
bio.c	…
blk-cgroup-fc-appid.c	…
blk-cgroup-rwstat.c	…
blk-cgroup-rwstat.h	…
blk-cgroup.c	blk-cgroup: remove redundant __GFP_NOWARN	2025-08-11 07:59:40 -06:00
blk-cgroup.h	…
blk-core.c	…
blk-crypto-fallback.c	…
blk-crypto-internal.h	…
blk-crypto-profile.c	…
blk-crypto-sysfs.c	…
blk-crypto.c	…
blk-flush.c	…
blk-ia-ranges.c	…
blk-integrity.c	…
blk-ioc.c	…
blk-iocost.c	…
blk-iolatency.c	…
blk-ioprio.c	…
blk-ioprio.h	…
blk-lib.c	…
blk-map.c	…
blk-merge.c	…
blk-mq-cpumap.c	…
blk-mq-debugfs.c	…
blk-mq-debugfs.h	…
blk-mq-dma.c	…
blk-mq-sched.c	…
blk-mq-sched.h	…
blk-mq-sysfs.c	…
blk-mq-tag.c	…
blk-mq.c	…
blk-mq.h	…
blk-pm.c	…
blk-pm.h	…
blk-rq-qos.c	…
blk-rq-qos.h	…
blk-settings.c	…
blk-stat.c	…
blk-stat.h	…
blk-sysfs.c	block: restore default wbt enablement	2025-08-13 05:33:48 -06:00
blk-throttle.c	…
blk-throttle.h	…
blk-timeout.c	…
blk-wbt.c	blk-wbt: Eliminate ambiguity in the comments of struct rq_wb	2025-08-11 10:21:38 -06:00
blk-wbt.h	…
blk-zoned.c	…
blk.h	block: fix kobject double initialization in add_disk	2025-08-11 08:00:49 -06:00
bsg-lib.c	…
bsg.c	…
disk-events.c	…
early-lookup.c	…
elevator.c	…
elevator.h	…
fops.c	…
genhd.c	block: fix kobject double initialization in add_disk	2025-08-11 08:00:49 -06:00
holder.c	…
ioctl.c	…
ioprio.c	…
kyber-iosched.c	lib/sbitmap: convert shallow_depth from one word to the whole sbitmap	2025-08-07 06:30:17 -06:00
mq-deadline.c	lib/sbitmap: convert shallow_depth from one word to the whole sbitmap	2025-08-07 06:30:17 -06:00
opal_proto.h	…
sed-opal.c	…
t10-pi.c	…