AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/block
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Jens Axboe 77f1e0a52d bfq: update internal depth state when queue depth changes 
A previous commit moved the shallow depth and BFQ depth map calculations
to be done at init time, moving it outside of the hotter IO path. This
potentially causes hangs if the users changes the depth of the scheduler
map, by writing to the 'nr_requests' sysfs file for that device.

Add a blk-mq-sched hook that allows blk-mq to inform the scheduler if
the depth changes, so that the scheduler can update its internal state.

Tested-by: Kai Krakow <kai@kaishome.de>
Reported-by: Paolo Valente <paolo.valente@linaro.org>
Fixes: f0635b8a41 ("bfq: calculate shallow depths at init time")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-13 19:08:22 -06:00
..
partitions
badblocks.c
bfq-cgroup.c blkcg: fix ref count issue with bio_blkcg() using task_css 2018-12-07 22:26:36 -07:00
bfq-iosched.c bfq: update internal depth state when queue depth changes 2019-04-13 19:08:22 -06:00
bfq-iosched.h block, bfq: fix use after free in bfq_bfqq_expire 2019-04-10 07:54:38 -06:00
bfq-wf2q.c block, bfq: fix use after free in bfq_bfqq_expire 2019-04-10 07:54:38 -06:00
bio-integrity.c block: remove the bio_integrity_advance export 2018-12-16 08:33:57 -07:00
bio.c block: do not leak memory in bio_copy_user_iov() 2019-04-10 16:14:40 -06:00
blk-cgroup.c blkcg: Fix kernel-doc warnings 2019-03-20 14:39:09 -06:00
blk-core.c block: Revert v5.0 blk_mq_request_issue_directly() changes 2019-04-05 09:40:46 -06:00
blk-exec.c
blk-flush.c blk-mq: use blk_mq_put_driver_tag() to put tag 2019-03-24 10:26:16 -06:00
blk-integrity.c
blk-ioc.c
blk-iolatency.c blk-iolatency: #include "blk.h" 2019-03-20 14:19:38 -06:00
blk-lib.c
blk-map.c
blk-merge.c block: fix segment calculation for passthrough IO 2019-03-06 09:42:54 -07:00
blk-mq-cpumap.c
blk-mq-debugfs-zoned.c block: Cleanup license notice 2019-01-17 21:21:40 -07:00
blk-mq-debugfs.c SCSI misc on 20190306 2019-03-09 16:53:47 -08:00
blk-mq-debugfs.h blk-mq-debugfs: support rq_qos 2018-12-16 19:53:47 -07:00
blk-mq-pci.c
blk-mq-rdma.c blk-mq-rdma: pass in queue map to blk_mq_rdma_map_queues 2018-12-13 09:59:08 +01:00
blk-mq-sched.c block: Revert v5.0 blk_mq_request_issue_directly() changes 2019-04-05 09:40:46 -06:00
blk-mq-sched.h block: mq-deadline: Fix write completion handling 2018-12-17 11:19:39 -07:00
blk-mq-sysfs.c blk-mq: export hctx->type in debugfs instead of sysfs 2018-12-17 05:44:45 -07:00
blk-mq-tag.c blk-mq: save queue mapping result into ctx directly 2019-02-01 08:33:04 -07:00
blk-mq-tag.h
blk-mq-virtio.c
blk-mq.c bfq: update internal depth state when queue depth changes 2019-04-13 19:08:22 -06:00
blk-mq.h block: Revert v5.0 blk_mq_request_issue_directly() changes 2019-04-05 09:40:46 -06:00
blk-pm.c
blk-pm.h
blk-rq-qos.c blk-mq-debugfs: support rq_qos 2018-12-16 19:53:47 -07:00
blk-rq-qos.h block: fix blk-iolatency accounting underflow 2018-12-17 11:19:54 -07:00
blk-settings.c block: kill QUEUE_FLAG_FLUSH_NQ 2019-02-09 15:40:24 -07:00
blk-softirq.c
blk-stat.c
blk-stat.h block: deactivate blk_stat timer in wbt_disable_default() 2018-12-12 06:47:51 -07:00
blk-sysfs.c block: add BLK_MQ_POLL_CLASSIC for hybrid poll and return EINVAL for unexpected value 2019-03-20 14:02:07 -06:00
blk-throttle.c blkcg: consolidate bio_issue_init() to be a part of core 2018-12-07 22:26:37 -07:00
blk-timeout.c
blk-wbt.c blk-wbt: Declare local functions static 2019-01-24 11:09:21 -07:00
blk-wbt.h
blk-zoned.c for-4.21/block-20181221 2018-12-28 13:19:59 -08:00
blk.h blk-mq: save queue mapping result into ctx directly 2019-02-01 08:33:04 -07:00
bounce.c block: bounce: make sure that bvec table is updated 2019-02-21 10:58:44 -07:00
bsg-lib.c scsi: bsg-lib: handle bidi requests without block layer help 2019-02-05 21:27:40 -05:00
bsg.c scsi: bsg-lib: handle bidi requests without block layer help 2019-02-05 21:27:40 -05:00
cmdline-parser.c
compat_ioctl.c
elevator.c block: avoid setting none scheduler if it's already none 2019-02-11 08:21:40 -07:00
genhd.c block: Replace function name in string with __func__ 2019-02-28 14:09:08 -07:00
ioctl.c
ioprio.c
Kconfig Kconfig updates for v4.21 2018-12-29 13:03:29 -08:00
Kconfig.iosched
kyber-iosched.c kyber: use sbitmap add_wait_queue/list_del wait helpers 2018-12-20 12:17:21 -07:00
Makefile
mq-deadline.c block: mq-deadline: Fix write completion handling 2018-12-17 11:19:39 -07:00
opal_proto.h
partition-generic.c block: return just one value from part_in_flight 2018-12-10 08:30:38 -07:00
scsi_ioctl.c
sed-opal.c
t10-pi.c