From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@fb.com>,
linux-block@vger.kernel.org,
Christoph Hellwig <hch@infradead.org>,
Bart Van Assche <bart.vanassche@sandisk.com>,
linux-scsi@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>,
"James E . J . Bottomley" <jejb@linux.vnet.ibm.com>
Cc: Oleksandr Natalenko <oleksandr@natalenko.name>,
Johannes Thumshirn <jthumshirn@suse.de>,
Tejun Heo <tj@kernel.org>, Ming Lei <ming.lei@redhat.com>
Subject: [PATCH V3 3/8] blk-mq: only run hw queues for blk-mq
Date: Sat, 2 Sep 2017 21:08:35 +0800 [thread overview]
Message-ID: <20170902130840.24609-4-ming.lei@redhat.com> (raw)
In-Reply-To: <20170902130840.24609-1-ming.lei@redhat.com>
This patch just makes it explicitely.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
block/blk-mq.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 8cf1f7cbef2b..4c532d8612e1 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -125,7 +125,8 @@ void blk_freeze_queue_start(struct request_queue *q)
freeze_depth = atomic_inc_return(&q->mq_freeze_depth);
if (freeze_depth == 1) {
percpu_ref_kill(&q->q_usage_counter);
- blk_mq_run_hw_queues(q, false);
+ if (q->mq_ops)
+ blk_mq_run_hw_queues(q, false);
}
}
EXPORT_SYMBOL_GPL(blk_freeze_queue_start);
--
2.9.5
next prev parent reply other threads:[~2017-09-02 13:09 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-02 13:08 [PATCH V3 0/8] block/scsi: safe SCSI quiescing Ming Lei
2017-09-02 13:08 ` [PATCH V3 1/8] blk-mq: rename blk_mq_unfreeze_queue as blk_unfreeze_queue Ming Lei
2017-09-02 13:08 ` [PATCH V3 2/8] blk-mq: rename blk_mq_freeze_queue as blk_freeze_queue Ming Lei
2017-09-02 13:08 ` Ming Lei [this message]
2017-09-02 13:08 ` [PATCH V3 4/8] blk-mq: rename blk_mq_freeze_queue_wait as blk_freeze_queue_wait Ming Lei
2017-09-02 13:08 ` [PATCH V3 5/8] block: tracking request allocation with q_usage_counter Ming Lei
2017-09-02 13:08 ` [PATCH V3 6/8] block: introduce preempt version of blk_[freeze|unfreeze]_queue Ming Lei
2017-09-04 15:21 ` Bart Van Assche
2017-09-04 16:20 ` Ming Lei
2017-09-02 13:08 ` [PATCH V3 7/8] block: allow to allocate req with REQF_PREEMPT when queue is preempt frozen Ming Lei
2017-09-02 13:12 ` Ming Lei
2017-09-04 4:13 ` Bart Van Assche
2017-09-04 7:16 ` Ming Lei
2017-09-04 15:40 ` Bart Van Assche
2017-09-04 16:08 ` Ming Lei
2017-09-04 16:18 ` Bart Van Assche
2017-09-04 16:28 ` Ming Lei
2017-09-05 1:40 ` Bart Van Assche
2017-09-05 2:23 ` Ming Lei
2017-09-08 3:08 ` Ming Lei
2017-09-08 17:28 ` Bart Van Assche
2017-09-09 7:21 ` Ming Lei
2017-09-02 13:08 ` [PATCH V3 8/8] SCSI: preempt freeze block queue when SCSI device is put into quiesce Ming Lei
2017-09-02 14:47 ` [PATCH V3 0/8] block/scsi: safe SCSI quiescing Oleksandr Natalenko
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