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Bart Van Assche d60055cf52 block/mq-deadline: Switch back to a single dispatch list 
Commit c807ab520f ("block/mq-deadline: Add I/O priority support")
modified the behavior of request flag BLK_MQ_INSERT_AT_HEAD from
dispatching a request before other requests into dispatching a request
before other requests with the same I/O priority. This is not correct since
BLK_MQ_INSERT_AT_HEAD is used when requeuing requests and also when a flush
request is inserted.  Both types of requests should be dispatched as soon
as possible. Hence, make the mq-deadline I/O scheduler again ignore the I/O
priority for BLK_MQ_INSERT_AT_HEAD requests.

Cc: Damien Le Moal <dlemoal@kernel.org>
Cc: Yu Kuai <yukuai@kernel.org>
Reported-by: chengkaitao <chengkaitao@kylinos.cn>
Closes: https://lore.kernel.org/linux-block/20251009155253.14611-1-pilgrimtao@gmail.com/
Fixes: c807ab520f ("block/mq-deadline: Add I/O priority support")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moalv <dlemoal@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 		2025-10-20 10:37:42 -06:00
..
partitions block: switch ->getgeo() to struct gendisk 2025-08-13 02:59:29 -04:00
Kconfig block: Remove obsolete configs BLK_MQ_{PCI,VIRTIO} 2025-05-14 05:43:56 -06:00
Kconfig.iosched
…
Makefile blk-mq: move the DMA mapping code to a separate file 2025-05-16 08:43:41 -06:00
badblocks.c badblocks: Fix a nonsense WARN_ON() which checks whether a u64 variable < 0 2025-03-10 07:41:58 -06:00
bdev.c fs: rename generic_delete_inode() and generic_drop_inode() 2025-09-15 16:09:42 +02:00
bfq-cgroup.c Revert "block, bfq: merge bfq_release_process_ref() into bfq_put_cooperator()" 2024-11-19 19:05:32 -07:00
bfq-iosched.c blk-mq: fix elevator depth_updated method 2025-09-05 13:52:52 -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 block: rename tuple_size field in blk_integrity to metadata_size 2025-07-01 14:00:14 +02:00
bio-integrity.c blk-integrity: enable p2p source and destination 2025-09-09 10:33:27 -06:00
bio.c block: rename bio_iov_iter_get_pages_aligned to bio_iov_iter_get_pages 2025-10-07 08:05:44 -06:00
blk-cgroup-fc-appid.c
…
blk-cgroup-rwstat.c blk-cgroup: use group allocation/free of per-cpu counters API 2024-04-03 09:10:17 -06:00
blk-cgroup-rwstat.h blk-cgroup: rwstat: fix kernel-doc warnings in header file 2025-01-13 07:47:09 -07:00
blk-cgroup.c block: Remove elevator_lock usage from blkg_conf frozen operations 2025-10-15 08:00:19 -06:00
blk-cgroup.h block: initialize bio issue time in blk_mq_submit_bio() 2025-09-10 05:23:45 -06:00
blk-core.c for-6.18/block-20250929 2025-10-02 10:16:56 -07:00
blk-crypto-fallback.c blk-crypto: convert to use bio_submit_split_bioset() 2025-09-10 05:23:46 -06:00
blk-crypto-internal.h blk-crypto: add ioctls to create and prepare hardware-wrapped keys 2025-02-10 09:54:19 -07:00
blk-crypto-profile.c blk-crypto: export wrapped key functions 2025-05-06 19:08:08 +02:00
blk-crypto-sysfs.c blk-crypto: show supported key types in sysfs 2025-02-10 09:54:19 -07:00
blk-crypto.c blk-crypto: add ioctls to create and prepare hardware-wrapped keys 2025-02-10 09:54:19 -07:00
blk-flush.c block: remove unused parameter 2025-03-12 08:25:28 -06:00
blk-ia-ranges.c block: get rid of request queue ->sysfs_dir_lock 2025-01-29 07:16:47 -07:00
blk-integrity.c for-6.18/block-20250929 2025-10-02 10:16:56 -07:00
blk-ioc.c copy_process: pass clone_flags as u64 across calltree 2025-09-01 15:31:34 +02:00
blk-iocost.c for-6.15/block-20250322 2025-03-26 18:08:55 -07:00
blk-iolatency.c blk-mq: add QUEUE_FLAG_BIO_ISSUE_TIME 2025-09-10 05:23:45 -06:00
blk-ioprio.c blk-cgroup: Simplify policy files registration 2025-03-11 09:22:55 -10:00
blk-ioprio.h blk-ioprio: remove per-disk structure 2024-07-28 16:47:51 -06:00
blk-lib.c block: use largest_zero_folio in __blkdev_issue_zero_pages() 2025-09-13 16:54:54 -07:00
blk-map.c block: rename bio_iov_iter_get_pages_aligned to bio_iov_iter_get_pages 2025-10-07 08:05:44 -06:00
blk-merge.c block: fix ordering of recursive split IO 2025-09-10 05:23:46 -06:00
blk-mq-cpumap.c blk-mq: add number of queue calc helper 2025-07-01 10:24:19 -06:00
blk-mq-debugfs.c blk-mq: add QUEUE_FLAG_BIO_ISSUE_TIME 2025-09-10 05:23:45 -06:00
blk-mq-debugfs.h block: Replace zone_wlock debugfs entry with zone_wplugs entry 2024-04-17 08:44:03 -06:00
blk-mq-dma.c blk-mq-dma: bring back p2p request flags 2025-09-09 10:33:35 -06:00
blk-mq-sched.c blk-mq: fix stale tag depth for shared sched tags in blk_mq_update_nr_requests() 2025-10-15 07:49:19 -06:00
blk-mq-sched.h blk-mq-sched: add new parameter nr_requests in blk_mq_alloc_sched_tags() 2025-09-10 05:25:56 -06:00
blk-mq-sysfs.c blk-mq: Move flush queue allocation into blk_mq_init_hctx() 2025-09-08 08:05:32 -06:00
blk-mq-tag.c blk-mq: fix stale tag depth for shared sched tags in blk_mq_update_nr_requests() 2025-10-15 07:49:19 -06:00
blk-mq.c blk-mq: fix stale tag depth for shared sched tags in blk_mq_update_nr_requests() 2025-10-15 07:49:19 -06:00
blk-mq.h blk-mq: fix stale tag depth for shared sched tags in blk_mq_update_nr_requests() 2025-10-15 07:49:19 -06:00
blk-pm.c block: force noio scope in blk_mq_freeze_queue 2025-01-31 07:20:08 -07:00
blk-pm.h
…
blk-rq-qos.c block: avoid cpu_hotplug_lock depedency on freeze_lock 2025-08-21 07:11:11 -06:00
blk-rq-qos.h block: validate QoS before calling __rq_qos_done_bio() 2025-08-26 10:34:08 -06:00
blk-settings.c block: relax atomic write boundary vs chunk size check 2025-09-16 12:29:10 -06:00
blk-stat.c treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
blk-stat.h treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
blk-sysfs.c blk-mq: fix potential deadlock while nr_requests grown 2025-09-10 05:25:56 -06:00
blk-throttle.c blk-throttle: fix throtl_data leak during disk release 2025-09-17 07:27:29 -06:00
blk-throttle.h blk-throttle: fix access race during throttle policy activation 2025-09-08 08:24:44 -06:00
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-wbt: remove the separate write cache tracking 2023-12-26 09:28:10 -07:00
blk-zoned.c blk-zoned: Fix a lockdep complaint about recursive locking 2025-08-26 08:27:24 -06:00
blk.h block: fix ordering of recursive split IO 2025-09-10 05:23:46 -06:00
bsg-lib.c block: remove unused parameter 'q' parameter in __blk_rq_map_sg() 2025-03-13 05:46:19 -06:00
bsg.c SCSI misc on 20230629 2023-06-30 11:57:07 -07:00
disk-events.c block: move bdev_mark_dead out of disk_check_media_change 2023-10-28 13:29:23 +02:00
early-lookup.c wrapper for access to ->bd_partno 2024-05-02 17:48:09 -04:00
elevator.c blk-mq-sched: add new parameter nr_requests in blk_mq_alloc_sched_tags() 2025-09-10 05:25:56 -06:00
elevator.h blk-mq: fix elevator depth_updated method 2025-09-05 13:52:52 -06:00
fops.c block: move bio_iov_iter_get_bdev_pages to block/fops.c 2025-10-07 08:05:44 -06:00
genhd.c block: fix kobject double initialization in add_disk 2025-08-11 08:00:49 -06:00
holder.c block: fix deadlock between bd_link_disk_holder and partition scan 2024-02-23 07:44:19 -07:00
ioctl.c for-6.18/block-20250929 2025-10-02 10:16:56 -07:00
ioprio.c block: remove test of incorrect io priority level 2025-05-08 09:04:12 -06:00
kyber-iosched.c blk-mq: fix elevator depth_updated method 2025-09-05 13:52:52 -06:00
mq-deadline.c block/mq-deadline: Switch back to a single dispatch list 2025-10-20 10:37:42 -06:00
opal_proto.h block: sed-opal: handle empty atoms when parsing response 2024-02-16 15:52:45 -07:00
sed-opal.c block: sed-opal: add ioctl IOC_OPAL_SET_SID_PW 2024-10-22 08:16:40 -06:00
t10-pi.c block: rename tuple_size field in blk_integrity to metadata_size 2025-07-01 14:00:14 +02:00