Bart Van Assche d55450b96f block/mq-deadline: Fix the tag reservation code ... commit 39823b47bb upstream. The current tag reservation code is based on a misunderstanding of the meaning of data->shallow_depth. Fix the tag reservation code as follows: * By default, do not reserve any tags for synchronous requests because for certain use cases reserving tags reduces performance. See also Harshit Mogalapalli, [bug-report] Performance regression with fio sequential-write on a multipath setup, 2024-03-07 (https://lore.kernel.org/linux-block/5ce2ae5d-61e2-4ede-ad55-551112602401@oracle.com/) * Reduce min_shallow_depth to one because min_shallow_depth must be less than or equal any shallow_depth value. * Scale dd->async_depth from the range [1, nr_requests] to [1, bits_per_sbitmap_word]. Cc: Christoph Hellwig <hch@lst.de> Cc: Damien Le Moal <dlemoal@kernel.org> Cc: Zhiguo Niu <zhiguo.niu@unisoc.com> Fixes: 07757588e5 ("block/mq-deadline: Reserve 25% of scheduler tags for synchronous requests") Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20240509170149.7639-3-bvanassche@acm.org Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-08-14 13:53:02 +02:00
..
partitions	block: Move checking GENHD_FL_NO_PART to bdev_add_partition()	2024-01-31 16:17:11 -08:00
badblocks.c	block/badblocks: Remove redundant assignments	2022-04-23 07:15:26 -06:00
bdev.c	block: update the stable_writes flag in bdev_add	2024-01-10 17:10:32 +01:00
bfq-cgroup.c	block, bfq: fix uaf for bfqq in bic_set_bfqq()	2023-02-09 11:28:06 +01:00
bfq-iosched.c	block, bfq: Fix division by zero error on zero wsum	2023-05-24 17:32:38 +01:00
bfq-iosched.h	block, bfq: remove unused variable for bfq_queue	2022-10-20 05:46:49 -07:00
bfq-wf2q.c	block, bfq: remove useless parameter for bfq_add/del_bfqq_busy()	2022-08-22 10:07:56 -06:00
bio-integrity.c	block: initialize integrity buffer to zero before writing it to media	2024-08-03 08:48:53 +02:00
bio.c	block: Fix page refcounts for unaligned buffers in __bio_release_pages()	2024-04-03 15:19:46 +02:00
blk-cgroup-fc-appid.c	cgroup: Homogenize cgroup_get_from_id() return value	2022-08-26 10:57:41 -10:00
blk-cgroup-rwstat.c
blk-cgroup-rwstat.h	block: Use the new blk_opf_t type	2022-07-14 12:14:30 -06:00
blk-cgroup.c	blk-cgroup: bypass blkcg_deactivate_policy after destroying	2023-12-20 17:00:21 +01:00
blk-cgroup.h	blk-cgroup: pass a gendisk to blkcg_init_queue and blkcg_exit_queue	2022-09-26 19:09:31 -06:00
blk-core.c	block: support to account io_ticks precisely	2024-06-12 11:03:07 +02:00
blk-crypto-fallback.c	blk-crypto: dynamically allocate fallback profile	2023-08-23 17:52:39 +02:00
blk-crypto-internal.h	blk-mq: release crypto keyslot before reporting I/O complete	2023-05-11 23:03:00 +09:00
blk-crypto-profile.c	blk-crypto: use dynamic lock class for blk_crypto_profile::lock	2023-07-23 13:49:21 +02:00
blk-crypto-sysfs.c	blk-crypto: show crypto capabilities in sysfs	2022-02-28 06:40:23 -07:00
blk-crypto.c	blk-crypto: make blk_crypto_evict_key() more robust	2023-05-11 23:03:01 +09:00
blk-flush.c	block: change request end_io handler to pass back a return value	2022-09-30 07:49:09 -06:00
blk-ia-ranges.c	block: simplify disk_set_independent_access_ranges	2022-06-29 08:36:46 -06:00
blk-integrity.c
blk-ioc.c	block: fix default IO priority handling again	2022-06-27 06:29:12 -06:00
blk-iocost.c	blk-iocost: avoid out of bounds shift	2024-05-17 11:56:07 +02:00
blk-iolatency.c	blk-cgroup: pass a gendisk to blkcg_schedule_throttle	2022-09-26 19:17:28 -06:00
blk-ioprio.c	blk-ioprio: pass a gendisk to blk_ioprio_init and blk_ioprio_exit	2022-09-26 19:09:31 -06:00
blk-ioprio.h	blk-ioprio: pass a gendisk to blk_ioprio_init and blk_ioprio_exit	2022-09-26 19:09:31 -06:00
blk-lib.c	blk-lib: fix blkdev_issue_secure_erase	2022-09-15 00:25:17 -06:00
blk-map.c	block: Fix WARNING in _copy_from_iter	2024-03-01 13:26:25 +01:00
blk-merge.c	block: support to account io_ticks precisely	2024-06-12 11:03:07 +02:00
blk-mq-cpumap.c	block: Change the return type of blk_mq_map_queues() into void	2022-08-22 10:07:53 -06:00
blk-mq-debugfs-zoned.c	block: move zone related fields to struct gendisk	2022-07-06 06:46:26 -06:00
blk-mq-debugfs.c	blk-mq: fix potential io hang by wrong 'wake_batch'	2023-07-19 16:20:55 +02:00
blk-mq-debugfs.h	block: remove per-disk debugfs files in blk_unregister_queue	2022-06-17 07:31:05 -06:00
blk-mq-pci.c	block: Change the return type of blk_mq_map_queues() into void	2022-08-22 10:07:53 -06:00
blk-mq-rdma.c	block: Change the return type of blk_mq_map_queues() into void	2022-08-22 10:07:53 -06:00
blk-mq-sched.c	blk-mq: correct stale comment of .get_budget	2023-03-10 09:32:44 +01:00
blk-mq-sched.h
blk-mq-sysfs.c	blk-mq: fix possible memleak when register 'hctx' failed	2022-12-31 13:33:03 +01:00
blk-mq-tag.c	blk-mq: fix potential io hang by wrong 'wake_batch'	2023-07-19 16:20:55 +02:00
blk-mq-tag.h	blk-mq: blk_mq_tag_busy is no need to return a value	2022-06-27 06:29:12 -06:00
blk-mq-virtio.c	block: Change the return type of blk_mq_map_queues() into void	2022-08-22 10:07:53 -06:00
blk-mq.c	block: Call .limit_depth() after .hctx has been set	2024-08-14 13:53:02 +02:00
blk-mq.h	blk-mq: fix potential io hang by wrong 'wake_batch'	2023-07-19 16:20:55 +02:00
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
blk-rq-qos.c	block/rq_qos: Use atomic_try_cmpxchg in atomic_inc_below	2022-07-12 14:38:52 -06:00
blk-rq-qos.h	block/blk-rq-qos: delete useless enmu RQ_QOS_IOPRIO	2022-09-21 19:50:53 -06:00
blk-settings.c	block: Clear zone limits for a non-zoned stacked queue	2024-04-03 15:19:27 +02:00
blk-stat.c	block: prevent division by zero in blk_rq_stat_sum()	2024-04-13 13:05:12 +02:00
blk-stat.h
blk-sysfs.c	block: fix use-after-free of q->q_usage_counter	2023-10-10 22:00:37 +02:00
blk-throttle.c	blk-throttle: fix lockdep warning of "cgroup_mutex or RCU read lock required!"	2023-12-20 17:00:21 +01:00
blk-throttle.h	blk-throttle: pass a gendisk to blk_throtl_cancel_bios	2022-09-26 19:17:28 -06:00
blk-timeout.c
blk-wbt.c	blk-wbt: fix that 'rwb->wc' is always set to 1 in wbt_init()	2022-10-09 07:48:16 -06:00
blk-wbt.h	blk-wbt: remove wbt_track stub	2022-03-31 12:58:38 -06:00
blk-zoned.c	block: adapt blk_mq_plug() to not plug for writes that require a zone lock	2022-09-29 07:45:47 -06:00
blk.h	block: support to account io_ticks precisely	2024-06-12 11:03:07 +02:00
bounce.c	block: change the blk_queue_bounce calling convention	2022-08-02 17:22:54 -06:00
bsg-lib.c	blk-mq: Drop blk_mq_ops.timeout 'reserved' arg	2022-07-06 06:33:53 -06:00
bsg.c	scsi: core: bsg: Remove usage of the deprecated ida_simple_xxx() API	2022-06-21 21:22:51 -04:00
disk-events.c	block: increment diskseq on all media change events	2023-07-19 16:21:47 +02:00
elevator.c	blk-mq: use quiesced elevator switch when reinitializing queues	2022-09-27 09:58:56 -06:00
elevator.h	block: Use the new blk_opf_t type	2022-07-14 12:14:30 -06:00
fops.c	block: Don't invalidate pagecache for invalid falloc modes	2024-01-10 17:10:20 +01:00
genhd.c	block: support to account io_ticks precisely	2024-06-12 11:03:07 +02:00
holder.c	block: remove WARN_ON() from bd_link_disk_holder	2022-06-23 07:48:05 -06:00
ioctl.c	block/ioctl: prefer different overflow check	2024-06-27 13:46:15 +02:00
ioprio.c	block: Fix handling of tasks without ioprio in ioprio_get(2)	2022-06-27 06:29:12 -06:00
Kconfig	block: remove "select BLK_RQ_IO_DATA_LEN" from BLK_CGROUP_IOCOST dependency	2022-06-29 08:35:57 -06:00
Kconfig.iosched	block: only build the icq tracking code when needed	2021-12-16 10:59:02 -07:00
kyber-iosched.c	block/kyber: Use the new blk_opf_t type	2022-07-14 12:14:30 -06:00
Makefile	blk-cgroup: move blkcg_{get,set}_fc_appid out of line	2022-05-02 14:06:20 -06:00
mq-deadline.c	block/mq-deadline: Fix the tag reservation code	2024-08-14 13:53:02 +02:00
opal_proto.h	block: sed-opal: handle empty atoms when parsing response	2024-03-26 18:20:26 -04:00
sed-opal.c	block: sed-opal: handle empty atoms when parsing response	2024-03-26 18:20:26 -04:00
t10-pi.c	block: add pi for extended integrity	2022-03-07 12:48:35 -07:00