Ming Lei 454be724f6 block: drain queue before waiting for q_usage_counter becoming zero ... Now we track legacy requests with .q_usage_counter in commit 055f6e18e0 ("block: Make q_usage_counter also track legacy requests"), but that commit never runs and drains legacy queue before waiting for this counter becoming zero, then IO hang is caused in the test of pulling disk during IO. This patch fixes the issue by draining requests before waiting for q_usage_counter becoming zero, both Mauricio and chenxiang reported this issue, and observed that it can be fixed by this patch. Link: https://marc.info/?l=linux-block&m=151192424731797&w=2 Fixes: 055f6e18e08f("block: Make q_usage_counter also track legacy requests") Cc: Wen Xiong <wenxiong@us.ibm.com> Tested-by: "chenxiang (M)" <chenxiang66@hisilicon.com> Tested-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2018-01-05 09:09:48 -07:00
..
partitions
badblocks.c
bfq-cgroup.c
bfq-iosched.c
bfq-iosched.h
bfq-wf2q.c
bio-integrity.c
bio.c	block-throttle: avoid double charge	2017-12-20 11:10:17 -07:00
blk-cgroup.c
blk-core.c	block: drain queue before waiting for q_usage_counter becoming zero	2018-01-05 09:09:48 -07:00
blk-exec.c
blk-flush.c
blk-integrity.c
blk-ioc.c
blk-lib.c
blk-map.c	block: fix blk_rq_append_bio	2017-12-18 13:55:43 -07:00
blk-merge.c
blk-mq-cpumap.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-tag.h
blk-mq-virtio.c
blk-mq.c	block: drain queue before waiting for q_usage_counter becoming zero	2018-01-05 09:09:48 -07:00
blk-mq.h
blk-settings.c
blk-softirq.c
blk-stat.c
blk-stat.h
blk-sysfs.c
blk-tag.c
blk-throttle.c	block-throttle: avoid double charge	2017-12-20 11:10:17 -07:00
blk-timeout.c
blk-wbt.c
blk-wbt.h
blk-zoned.c
blk.h	block: drain queue before waiting for q_usage_counter becoming zero	2018-01-05 09:09:48 -07:00
bounce.c	block: don't let passthrough IO go into .make_request_fn()	2017-12-18 13:55:43 -07:00
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
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