Ming Lei 5815839b3c blk-mq: introduce new lock for protecting hctx->dispatch_wait ... Now hctx->lock is only acquired when adding hctx->dispatch_wait to one wait queue, but not held when removing it from the wait queue. IO hang can be observed easily if SCHED RESTART is disabled, that means now RESTART exits just for fixing the issue in blk_mq_mark_tag_wait(). This patch fixes the issue by introducing hctx->dispatch_wait_lock and holding it for removing hctx->dispatch_wait in blk_mq_dispatch_wake(), since we need to avoid acquiring hctx->lock in irq context. Fixes: eb619fdb2d ("blk-mq: fix issue with shared tag queue re-running") Cc: Christoph Hellwig <hch@lst.de> Cc: Omar Sandoval <osandov@fb.com> Cc: Bart Van Assche <bart.vanassche@wdc.com> Tested-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2018-07-09 09:07:52 -06:00
..
partitions
badblocks.c
bfq-cgroup.c
bfq-iosched.c	block, bfq: give a better name to bfq_bfqq_may_idle	2018-07-09 09:07:52 -06:00
bfq-iosched.h	block, bfq: add/remove entity weights correctly	2018-07-09 09:07:52 -06:00
bfq-wf2q.c	block, bfq: fix service being wrongly set to zero in case of preemption	2018-07-09 09:07:52 -06:00
bio-integrity.c
bio.c
blk-cgroup.c
blk-core.c
blk-exec.c
blk-flush.c
blk-integrity.c
blk-ioc.c
blk-lib.c
blk-map.c
blk-merge.c
blk-mq-cpumap.c
blk-mq-debugfs-zoned.c	block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n	2018-07-09 09:07:52 -06:00
blk-mq-debugfs.c	block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n	2018-07-09 09:07:52 -06:00
blk-mq-debugfs.h	block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n	2018-07-09 09:07:52 -06:00
blk-mq-pci.c
blk-mq-rdma.c
blk-mq-sched.c
blk-mq-sched.h
blk-mq-sysfs.c
blk-mq-tag.c
blk-mq-tag.h
blk-mq-virtio.c
blk-mq.c	blk-mq: introduce new lock for protecting hctx->dispatch_wait	2018-07-09 09:07:52 -06:00
blk-mq.h	blk-mq: cleanup blk_mq_get_driver_tag()	2018-07-09 09:07:52 -06:00
blk-settings.c
blk-softirq.c
blk-stat.c
blk-stat.h
blk-sysfs.c
blk-tag.c
blk-throttle.c
blk-timeout.c
blk-wbt.c
blk-wbt.h
blk-zoned.c	block: Remove a superfluous cast from blkdev_report_zones()	2018-07-09 09:07:52 -06:00
blk.h
bounce.c
bsg-lib.c
bsg.c
cfq-iosched.c
cmdline-parser.c
compat_ioctl.c
deadline-iosched.c
elevator.c
genhd.c
ioctl.c
ioprio.c
Kconfig	block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n	2018-07-09 09:07:52 -06:00
Kconfig.iosched
kyber-iosched.c
Makefile	block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n	2018-07-09 09:07:52 -06:00
mq-deadline.c
noop-iosched.c
opal_proto.h
partition-generic.c
scsi_ioctl.c
sed-opal.c
t10-pi.c