Jianchao Wang 85bd6e61f3 blk-mq: fix a hung issue when fsync ... Florian reported a io hung issue when fsync(). It should be triggered by following race condition. data + post flush a flush blk_flush_complete_seq case REQ_FSEQ_DATA blk_flush_queue_rq issued to driver blk_mq_dispatch_rq_list try to issue a flush req failed due to NON-NCQ command .queue_rq return BLK_STS_DEV_RESOURCE request completion req->end_io // doesn't check RESTART mq_flush_data_end_io case REQ_FSEQ_POSTFLUSH blk_kick_flush do nothing because previous flush has not been completed blk_mq_run_hw_queue insert rq to hctx->dispatch due to RESTART is still set, do nothing To fix this, replace the blk_mq_run_hw_queue in mq_flush_data_end_io with blk_mq_sched_restart to check and clear the RESTART flag. Fixes: bd166ef1 (blk-mq-sched: add framework for MQ capable IO schedulers) Reported-by: Florian Stecker <m19@florianstecker.de> Tested-by: Florian Stecker <m19@florianstecker.de> Signed-off-by: Jianchao Wang <jianchao.w.wang@oracle.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2019-01-30 08:53:54 -07:00
..
partitions
badblocks.c
bfq-cgroup.c
bfq-iosched.c
bfq-iosched.h
bfq-wf2q.c	block, bfq: fix comments on __bfq_deactivate_entity	2019-01-14 06:25:44 -07:00
bio-integrity.c	block: remove the bio_integrity_advance export	2018-12-16 08:33:57 -07:00
bio.c	for-4.21/block-20190102	2019-01-02 18:49:58 -08:00
blk-cgroup.c	blkcg: remove unused __blkg_release_rcu()	2018-12-21 08:47:58 -07:00
blk-core.c	block: pass no-op callback to INIT_WORK().	2019-01-30 08:53:20 -07:00
blk-exec.c
blk-flush.c	blk-mq: fix a hung issue when fsync	2019-01-30 08:53:54 -07:00
blk-integrity.c
blk-ioc.c
blk-iolatency.c	block: fix blk-iolatency accounting underflow	2018-12-17 11:19:54 -07:00
blk-lib.c
blk-map.c
blk-merge.c	Revert "block: cover another queue enter recursion via BIO_QUEUE_ENTERED"	2019-01-27 06:35:28 -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	blk-mq: fix the cmd_flag_name array	2019-01-24 08:41:42 -07:00
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	blk-mq: fix dispatch from sw queue	2018-12-17 11:19:54 -07:00
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-tag.h
blk-mq-virtio.c
blk-mq.c	block: don't lose track of REQ_INTEGRITY flag	2019-01-16 07:28:10 -07:00
blk-mq.h	blk-mq: fix dispatch from sw queue	2018-12-17 11:19:54 -07:00
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	SCSI misc on 20181224	2018-12-28 14:48:06 -08:00
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	SCSI misc on 20181224	2018-12-28 14:48:06 -08:00
blk-throttle.c
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
bounce.c
bsg-lib.c
bsg.c	bsg: deprecate BIDI support in bsg	2018-12-21 08:47:58 -07:00
cmdline-parser.c
compat_ioctl.c
elevator.c
genhd.c	block: return just one value from part_in_flight	2018-12-10 08:30:38 -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