Ming Lei 9d497e2941 block: don't protect submit_bio_checks by q_usage_counter ... Commit cc9c884dd7 ("block: call submit_bio_checks under q_usage_counter") uses q_usage_counter to protect submit_bio_checks for avoiding IO after disk is deleted by del_gendisk(). Turns out the protection isn't necessary, because once blk_mq_freeze_queue_wait() in del_gendisk() returns: 1) all in-flight IO has been done 2) all new IO will be failed in __bio_queue_enter() because q_usage_counter is dead, and GD_DEAD is set 3) both disk and request queue instance are safe since caller of submit_bio() guarantees that the disk can't be closed. Once submit_bio_checks() needn't the protection of q_usage_counter, we can move submit_bio_checks before calling blk_mq_submit_bio() and ->submit_bio(). With this change, we needn't to throttle queue with holding one allocated request, then precise driver tag or request won't be wasted in throttling. Meantime we can unify the bio check for both bio based and request based driver. Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20220104134223.590803-1-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>		2022-01-09 18:54:52 -07:00
..
partitions	block: remove GENHD_FL_EXT_DEVT	2021-11-29 06:38:35 -07:00
badblocks.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
bdev.c	bdev: Improve lookup_bdev documentation	2021-12-13 11:29:16 -07:00
bfq-cgroup.c	block, bfq: fix UAF problem in bfqg_stats_init()	2021-10-19 15:18:30 -06:00
bfq-iosched.c	block: simplify ioc_lookup_icq	2021-11-29 06:41:29 -07:00
bfq-iosched.h	bfq: Provide helper to generate bfqq name	2021-11-29 06:38:52 -07:00
bfq-wf2q.c	block: Introduce IOPRIO_NR_LEVELS	2021-08-18 07:21:12 -06:00
bio-integrity.c	block: convert the rest of block to bdev_get_queue	2021-10-18 06:17:37 -06:00
bio.c	block: use singly linked list for bio cache	2021-12-16 08:43:09 -07:00
blk-cgroup-rwstat.c	blk-cgroup: Fix the recursive blkg rwstat	2021-03-05 11:32:15 -07:00
blk-cgroup-rwstat.h	blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT	2019-11-07 12:28:13 -07:00
blk-cgroup.c	block: don't include <linux/part_stat.h> in blk.h	2021-11-29 06:38:44 -07:00
blk-core.c	block: don't protect submit_bio_checks by q_usage_counter	2022-01-09 18:54:52 -07:00
blk-crypto-fallback.c	blk-crypto: rename blk_keyslot_manager to blk_crypto_profile	2021-10-21 10:49:32 -06:00
blk-crypto-internal.h	block: move struct request to blk-mq.h	2021-10-18 06:17:02 -06:00
blk-crypto-profile.c	blk-crypto: remove blk_crypto_unregister()	2021-11-29 06:38:51 -07:00
blk-crypto.c	blk-crypto: rename blk_keyslot_manager to blk_crypto_profile	2021-10-21 10:49:32 -06:00
blk-flush.c	block: switch to atomic_t for request references	2021-12-03 14:51:29 -07:00
blk-ia-ranges.c	block: fix kerneldoc for disk_register_independent_access__ranges()	2021-11-11 11:52:30 -07:00
blk-integrity.c	blk-crypto: remove blk_crypto_unregister()	2021-11-29 06:38:51 -07:00
blk-ioc.c	block: drop needless assignment in set_task_ioprio()	2021-12-23 07:10:07 -07:00
blk-iocost.c	block: convert the rest of block to bdev_get_queue	2021-10-18 06:17:37 -06:00
blk-iolatency.c	mm: don't include <linux/blk-cgroup.h> in <linux/backing-dev.h>	2021-10-18 06:17:01 -06:00
blk-ioprio.c	blk-ioprio: don't set bio priority if not needed	2021-11-29 06:38:35 -07:00
blk-ioprio.h	block: Introduce the ioprio rq-qos policy	2021-06-21 15:03:40 -06:00
blk-lib.c	block: export blk_next_bio()	2021-06-17 15:51:20 +02:00
blk-map.c	Merge branch 'akpm' (patches from Andrew)	2021-09-03 10:08:28 -07:00
blk-merge.c	block: don't check ->rq_disk in merges	2021-11-29 06:41:29 -07:00
blk-mq-cpumap.c	blk-mq: remove the calling of local_memory_node()	2020-10-20 07:08:17 -06:00
blk-mq-debugfs-zoned.c	block: Cleanup license notice	2019-01-17 21:21:40 -07:00
blk-mq-debugfs.c	blk-mq: check q->poll_stat in queue_poll_stat_show	2021-12-02 08:20:49 -07:00
blk-mq-debugfs.h	blk-mq: no need to check return value of debugfs_create functions	2019-06-13 03:00:30 -06:00
blk-mq-pci.c	block: Fix blk_mq_*_map_queues() kernel-doc headers	2019-05-31 15:12:34 -06:00
blk-mq-rdma.c	block: Fix blk_mq_*_map_queues() kernel-doc headers	2019-05-31 15:12:34 -06:00
blk-mq-sched.c	blk-mq: run dispatch lock once in case of issuing from list	2021-12-03 14:51:29 -07:00
blk-mq-sched.h	block: move blk_mq_sched_assign_ioc to blk-ioc.c	2021-11-29 06:41:29 -07:00
blk-mq-sysfs.c	blk-mq: move srcu from blk_mq_hw_ctx to request_queue	2021-12-03 14:51:29 -07:00
blk-mq-tag.c	blk-mq: Optimise blk_mq_queue_tag_busy_iter() for shared tags	2021-12-06 13:18:47 -07:00
blk-mq-tag.h	blk-mq: Delete busy_iter_fn	2021-12-06 13:18:47 -07:00
blk-mq-virtio.c	blk-mq: Fix typo in comment	2020-03-17 20:55:21 +01:00
blk-mq.c	block: don't protect submit_bio_checks by q_usage_counter	2022-01-09 18:54:52 -07:00
blk-mq.h	blk-mq: don't run might_sleep() if the operation needn't blocking	2021-12-06 09:40:42 -07:00
blk-pm.c	scsi: block: Fix a race in the runtime power management code	2020-12-09 11:41:41 -05:00
blk-pm.h	block: Remove unused blk_pm_*() function definitions	2021-02-22 06:33:48 -07:00
blk-rq-qos.c	rq-qos: fix missed wake-ups in rq_qos_throttle try two	2021-06-08 15:12:57 -06:00
blk-rq-qos.h	block: only mark bio as tracked if it really is tracked	2021-10-18 08:50:47 -06:00
blk-settings.c	block: Fix partition check for host-aware zoned block devices	2021-10-27 06:58:01 -06:00
blk-stat.c	block: make queue stat accounting a reference	2021-12-14 17:23:05 -07:00
blk-stat.h	block: make queue stat accounting a reference	2021-12-14 17:23:05 -07:00
blk-sysfs.c	block: call blk_exit_queue() before freeing q->stats	2021-12-20 21:07:51 -07:00
blk-throttle.c	block: don't include blk-mq.h in blk.h	2021-11-29 06:38:44 -07:00
blk-throttle.h	block: move blk-throtl fast path inline	2021-10-18 06:17:03 -06:00
blk-timeout.c	block: blk-timeout: delete duplicated word	2020-07-31 16:29:47 -06:00
blk-wbt.c	blk-wbt: prevent NULL pointer dereference in wb_timer_fn	2021-10-19 06:13:41 -06:00
blk-wbt.h	blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled()	2021-06-21 15:03:41 -06:00
blk-zoned.c	block: Hold invalidate_lock in BLKRESETZONE ioctl	2021-11-11 11:52:46 -07:00
blk.h	block: only build the icq tracking code when needed	2021-12-16 10:59:02 -07:00
bounce.c	mm: don't include <linux/blk-cgroup.h> in <linux/backing-dev.h>	2021-10-18 06:17:01 -06:00
bsg-lib.c	block: remove the gendisk argument to blk_execute_rq	2021-11-29 06:41:29 -07:00
bsg.c	scsi: bsg: Fix device unregistration	2021-09-14 00:22:15 -04:00
disk-events.c	block: return errors from disk_alloc_events	2021-08-23 12:55:45 -06:00
elevator.c	block: remove the e argument to elevator_exit	2021-11-29 06:38:44 -07:00
elevator.h	block: move elevator.h to block/	2021-10-18 06:17:01 -06:00
fops.c	block: move direct_IO into our own read_iter handler	2021-12-03 14:51:29 -07:00
genhd.c	block: check minor range in device_add_disk()	2021-12-21 09:34:29 -07:00
holder.c	block: drop unused includes in <linux/genhd.h>	2021-10-18 06:17:02 -06:00
ioctl.c	block: merge disk_scan_partitions and blkdev_reread_part	2021-11-29 06:35:21 -07:00
ioprio.c	block: move set_task_ioprio to blk-ioc.c	2021-12-16 10:59:01 -07:00
Kconfig	block: only build the icq tracking code when needed	2021-12-16 10:59:02 -07:00
Kconfig.iosched	block: only build the icq tracking code when needed	2021-12-16 10:59:02 -07:00
kyber-iosched.c	block: make queue stat accounting a reference	2021-12-14 17:23:05 -07:00
Makefile	block: remove blk-exec.c	2021-11-29 06:34:50 -07:00
mq-deadline.c	blk-mq: Stop using pointers for blk_mq_tags bitmap tags	2021-10-18 06:17:03 -06:00
opal_proto.h	block: sed-opal: Change the check condition for regular session validity	2020-03-12 08:00:10 -06:00
sed-opal.c	block: sed-opal: Change the check condition for regular session validity	2020-03-12 08:00:10 -06:00
t10-pi.c	block: move integrity handling out of <linux/blkdev.h>	2021-10-18 06:17:02 -06:00