Ming Lei df60f6e835 blk-wbt: fix IO hang in wbt_wait() ... On wbt invariant is that if one IO is tracked via WBT_TRACKED, rqw->inflight should be updated for tracking this IO. But commit c1c80384c8 ("block: remove external dependency on wbt_flags") forgets to remove the early handling of !rwb_enabled(rwb) inside wbt_wait(), then the inflight counter may not be increased in wbt_wait(), but decreased in wbt_done() for this kind of IO, so this counter may become negative, then wbt_wait() may wait forever. This patch fixes the report in the following link: https://marc.info/?l=linux-block&m=153221542021033&w=2 Fixes: c1c80384c8 ("block: remove external dependency on wbt_flags") Cc: Josef Bacik <jbacik@fb.com> Reported-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2018-08-14 11:05:52 -06:00
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partitions
badblocks.c
bfq-cgroup.c
bfq-iosched.c
bfq-iosched.h
bfq-wf2q.c
bio-integrity.c
bio.c	block: bvec_nr_vecs() returns value for wrong slab	2018-08-09 08:25:04 -06:00
blk-cgroup.c
blk-core.c	block: don't warn for flush on read-only device	2018-08-14 10:52:40 -06:00
blk-exec.c
blk-flush.c
blk-integrity.c
blk-ioc.c
blk-iolatency.c
blk-lib.c
blk-map.c
blk-merge.c
blk-mq-cpumap.c
blk-mq-debugfs-zoned.c
blk-mq-debugfs.c
blk-mq-debugfs.h
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: count the hctx as active before allocating tag	2018-08-09 08:34:17 -06:00
blk-mq-tag.h
blk-mq-virtio.c
blk-mq.c	blk-mq: count the hctx as active before allocating tag	2018-08-09 08:34:17 -06:00
blk-mq.h
blk-rq-qos.c
blk-rq-qos.h
blk-settings.c
blk-softirq.c
blk-stat.c
blk-stat.h
blk-sysfs.c	blkcg: Make blkg_root_lookup() work for queues in bypass mode	2018-08-11 15:41:25 -06:00
blk-tag.c
blk-throttle.c	Blk-throttle: reduce tail io latency when iops limit is enforced	2018-08-09 12:43:16 -06:00
blk-timeout.c
blk-wbt.c	blk-wbt: fix IO hang in wbt_wait()	2018-08-14 11:05:52 -06:00
blk-wbt.h
blk-zoned.c
blk.h	block: Introduce blk_exit_queue()	2018-08-09 09:12:59 -06:00
bounce.c
bsg-lib.c
bsg.c
cfq-iosched.c	cfq: Suppress compiler warnings about comparisons	2018-08-07 17:57:13 -06:00
cmdline-parser.c
compat_ioctl.c
deadline-iosched.c
elevator.c
genhd.c
ioctl.c
ioprio.c
Kconfig
Kconfig.iosched
kyber-iosched.c
Makefile
mq-deadline.c
noop-iosched.c
opal_proto.h
partition-generic.c
scsi_ioctl.c
sed-opal.c
t10-pi.c