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Sebastian Andrzej Siewior 71425189b2 blk-mq: Don't complete on a remote CPU in force threaded mode 
With force threaded interrupts enabled, raising softirq from an SMP
function call will always result in waking the ksoftirqd thread. This is
not optimal given that the thread runs at SCHED_OTHER priority.

Completing the request in hard IRQ-context on PREEMPT_RT (which enforces
the force threaded mode) is bad because the completion handler may
acquire sleeping locks which violate the locking context.

Disable request completing on a remote CPU in force threaded mode.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-12-17 13:41:30 -07:00
..
partitions
block: merge struct block_device and struct hd_struct
2020-12-01 14:53:40 -07:00
badblocks.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
bfq-cgroup.c
bfq: fix blkio cgroup leakage v4
2020-08-18 07:48:08 -07:00
bfq-iosched.c
block-5.10-2020-10-12
2020-10-13 12:12:44 -07:00
bfq-iosched.h
bfq: fix blkio cgroup leakage v4
2020-08-18 07:48:08 -07:00
bfq-wf2q.c
bfq: fix blkio cgroup leakage v4
2020-08-18 07:48:08 -07:00
bio-integrity.c
block: make function __bio_integrity_free() static
2020-07-02 12:38:18 -06:00
bio.c
bio: optimise bvec iteration
2020-12-02 09:46:55 -07:00
blk-cgroup-rwstat.c
blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT
2019-11-07 12:28:13 -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: merge struct block_device and struct hd_struct
2020-12-01 14:53:40 -07:00
blk-core.c
block: remove the request_queue argument to the block_bio_remap tracepoint
2020-12-04 09:42:00 -07:00
blk-crypto-fallback.c
block: rename generic_make_request to submit_bio_noacct
2020-07-01 07:27:24 -06:00
blk-crypto-internal.h
block: make blk_crypto_rq_bio_prep() able to fail
2020-10-05 10:47:43 -06:00
blk-crypto.c
block: warn if !__GFP_DIRECT_RECLAIM in bio_crypt_set_ctx()
2020-10-05 10:47:43 -06:00
blk-exec.c
block: add a blk_account_io_merge_bio helper
2020-05-27 05:21:23 -06:00
blk-flush.c
for-5.11/block-2020-12-14
2020-12-16 12:57:51 -08:00
blk-integrity.c
block: remove the unused blk_integrity_merge_bio export
2020-10-06 07:29:53 -06:00
blk-ioc.c
block: remove retry loop in ioc_release_fn()
2020-07-16 10:22:15 -06:00
blk-iocost.c
blk-iocost: Add iocg idle state tracepoint
2020-12-17 07:55:44 -07:00
blk-iolatency.c
block: Remove redundant 'return' statement
2020-10-08 07:59:48 -06:00
blk-lib.c
block: move the start_sect field to struct block_device
2020-12-01 14:53:40 -07:00
blk-map.c
block: fix bmd->is_null_mapped initialization
2020-09-23 09:18:39 -06:00
blk-merge.c
for-5.11/block-2020-12-14
2020-12-16 12:57:51 -08:00
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
bdi: replace BDI_CAP_STABLE_WRITES with a queue and a sb flag
2020-09-24 13:43:39 -06:00
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
block: remove the request_queue to argument request based tracepoints
2020-12-04 09:42:00 -07:00
blk-mq-sched.h
block-5.10-2020-10-12
2020-10-13 12:12:44 -07:00
blk-mq-sysfs.c
blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue
2020-10-09 12:46:28 -06:00
blk-mq-tag.c
block-mq: fix comments in blk_mq_queue_tag_busy_iter
2020-09-29 08:11:00 -06:00
blk-mq-tag.h
blk-mq: Relocate hctx_may_queue()
2020-09-03 15:20:47 -06:00
blk-mq-virtio.c
blk-mq: Fix typo in comment
2020-03-17 20:55:21 +01:00
blk-mq.c
blk-mq: Don't complete on a remote CPU in force threaded mode
2020-12-17 13:41:30 -07:00
blk-mq.h
blk-mq: update arg in comment of blk_mq_map_queue
2020-12-12 11:13:41 -07:00
blk-pm.c
scsi: block: pm: Simplify resume handling
2020-07-24 22:09:55 -04:00
blk-pm.h
block: remove the queue_lock indirection
2018-11-15 12:17:28 -07:00
blk-rq-qos.c
Revert "blk-rq-qos: remove redundant finish_wait to rq_qos_wait."
2020-07-15 09:33:37 -06:00
blk-rq-qos.h
blk-rq-qos: fix first node deletion of rq_qos_del()
2019-10-15 10:13:13 -06:00
blk-settings.c
for-5.11/drivers-2020-12-14
2020-12-16 13:09:32 -08:00
blk-stat.c
blk-stat: make q->stats->lock irqsafe
2020-09-01 16:48:46 -06:00
blk-stat.h
block: deactivate blk_stat timer in wbt_disable_default()
2018-12-12 06:47:51 -07:00
blk-sysfs.c
blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue
2020-10-09 12:46:28 -06:00
blk-throttle.c
blk-throttle: don't check whether or not lower limit is valid if CONFIG_BLK_DEV_THROTTLING_LOW is off
2020-12-02 12:44:20 -07:00
blk-timeout.c
block: blk-timeout: delete duplicated word
2020-07-31 16:29:47 -06:00
blk-wbt.c
block: wbt: Remove unnecessary invoking of wbt_update_limits in wbt_init
2020-11-30 15:01:18 -07:00
blk-wbt.h
blk-wbt: remove wbt_update_limits
2020-05-29 16:30:39 -06:00
blk-zoned.c
block: Improve blk_revalidate_disk_zones() checks
2020-12-07 17:34:21 -07:00
blk.h
for-5.11/drivers-2020-12-14
2020-12-16 13:09:32 -08:00
bounce.c
block: simplify and extend the block_bio_merge tracepoint class
2020-12-04 09:42:00 -07:00
bsg-lib.c
block: drop double zeroing
2020-09-23 09:18:13 -06:00
bsg.c
compat_ioctl: bsg: add handler
2020-01-03 09:33:21 +01:00
cmdline-parser.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
elevator.c
block: fix comment and add lockdep assert
2020-10-09 12:34:06 -06:00
genhd.c
block: stop using bdget_disk for partition 0
2020-12-01 14:53:40 -07:00
ioctl.c
block: move the policy field to struct block_device
2020-12-01 14:53:40 -07:00
ioprio.c
block: grant IOPRIO_CLASS_RT to CAP_SYS_NICE
2020-09-01 19:38:33 -06:00
Kconfig
blk-wbt: Remove obsolete multiqueue I/O scheduling comment
2020-09-01 16:49:26 -06:00
Kconfig.iosched
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
keyslot-manager.c
block/keyslot-manager: prevent crash when num_slots=1
2020-11-20 11:52:52 -07:00
kyber-iosched.c
blk-mq: Use pointers for blk_mq_tags bitmap tags
2020-09-03 15:20:47 -06:00
Makefile
blk-mq: merge blk-softirq.c into blk-mq.c
2020-06-24 09:15:56 -06:00
mq-deadline.c
blk-mq, elevator: Count requests per hctx to improve performance
2020-09-03 15:20:47 -06:00
opal_proto.h
block: sed-opal: Change the check condition for regular session validity
2020-03-12 08:00:10 -06:00
scsi_ioctl.c
drivers-5.10-2020-10-12
2020-10-13 13:04:41 -07:00
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: Allow t10-pi to be modular
2020-01-06 20:59:04 -07:00