From: Bart Van Assche <bart.vanassche@sandisk.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: <linux-block@vger.kernel.org>,
Bart Van Assche <bart.vanassche@sandisk.com>
Subject: [PATCH v3 0/5] Avoid that scsi-mq queue processing stalls
Date: Thu, 6 Apr 2017 11:10:45 -0700 [thread overview]
Message-ID: <20170406181050.12137-1-bart.vanassche@sandisk.com> (raw)
Hello Jens,
The five patches in this patch series fix the queue lockup I reported
recently on the linux-block mailing list. Please consider these patches
for inclusion in the upstream kernel.
Thanks,
Bart.
Changes between v2 and v3:
- Removed the blk_mq_ops.restart_hctx function pointer again.
- Modified blk_mq_sched_restart_queues() such that only a single hardware
queue is restarted instead of multiple if hardware queues are shared.
- Introduced a new function in the block layer, namely
blk_mq_delay_run_hw_queue().
Changes between v1 and v2:
- Reworked scsi_restart_queues() such that it no longer takes the SCSI
host lock.
- Added two patches - one for exporting blk_mq_sched_restart_hctx() and
another one to make iterating with RCU over blk_mq_tag_set.tag_list safe.
Bart Van Assche (5):
blk-mq: Make it safe to use RCU to iterate over
blk_mq_tag_set.tag_list
blk-mq: Restart a single queue if tag sets are shared
blk-mq: Clarify comments in blk_mq_dispatch_rq_list()
blk-mq: Introduce blk_mq_delay_run_hw_queue()
scsi: Avoid that SCSI queues get stuck
block/blk-mq-sched.c | 60 +++++++++++++++++++++++++++++++++++--------
block/blk-mq-sched.h | 16 +-----------
block/blk-mq.c | 68 +++++++++++++++++++++++++++++++++++++++----------
drivers/scsi/scsi_lib.c | 6 ++---
include/linux/blk-mq.h | 2 ++
include/linux/blkdev.h | 1 -
6 files changed, 111 insertions(+), 42 deletions(-)
--
2.12.0
next reply other threads:[~2017-04-06 18:10 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-06 18:10 Bart Van Assche [this message]
2017-04-06 18:10 ` [PATCH v3 1/5] blk-mq: Make it safe to use RCU to iterate over blk_mq_tag_set.tag_list Bart Van Assche
2017-04-07 9:46 ` Ming Lei
2017-04-07 15:15 ` Bart Van Assche
2017-04-06 18:10 ` [PATCH v3 2/5] blk-mq: Restart a single queue if tag sets are shared Bart Van Assche
2017-04-06 19:12 ` Jens Axboe
2017-04-06 19:21 ` Jens Axboe
2017-04-07 15:12 ` Bart Van Assche
2017-04-06 18:10 ` [PATCH v3 3/5] blk-mq: Clarify comments in blk_mq_dispatch_rq_list() Bart Van Assche
2017-04-06 18:10 ` [PATCH v3 4/5] blk-mq: Introduce blk_mq_delay_run_hw_queue() Bart Van Assche
2017-04-07 10:23 ` Ming Lei
2017-04-07 15:13 ` Bart Van Assche
2017-04-06 18:10 ` [PATCH v3 5/5] scsi: Avoid that SCSI queues get stuck Bart Van Assche
2017-04-07 9:41 ` [PATCH v3 0/5] Avoid that scsi-mq queue processing stalls Ming Lei
2017-04-07 15:18 ` Bart Van Assche
2017-04-07 15:34 ` Ming Lei
2017-04-07 15:46 ` Bart Van Assche
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