From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>, Keith Busch <kbusch@kernel.org>,
Sagi Grimberg <sagi@grimberg.me>, Chao Leng <lengchao@huawei.com>
Cc: Ming Lei <ming.lei@redhat.com>,
linux-nvme@lists.infradead.org, linux-block@vger.kernel.org
Subject: [PATCH 2/8] blk-mq: skip non-mq queues in blk_mq_quiesce_queue
Date: Thu, 20 Oct 2022 12:56:02 +0200 [thread overview]
Message-ID: <20221020105608.1581940-3-hch@lst.de> (raw)
In-Reply-To: <20221020105608.1581940-1-hch@lst.de>
For submit_bio based queues there is no (S)RCU critical section during
I/O submission and thus nothing to wait for in blk_mq_wait_quiesce_done,
so skip doing any synchronization.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/blk-mq.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 33292c01875d5..df967c8af9fee 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -280,7 +280,9 @@ EXPORT_SYMBOL_GPL(blk_mq_wait_quiesce_done);
void blk_mq_quiesce_queue(struct request_queue *q)
{
blk_mq_quiesce_queue_nowait(q);
- blk_mq_wait_quiesce_done(q);
+ /* nothing to wait for non-mq queues */
+ if (queue_is_mq(q))
+ blk_mq_wait_quiesce_done(q);
}
EXPORT_SYMBOL_GPL(blk_mq_quiesce_queue);
--
2.30.2
next prev parent reply other threads:[~2022-10-20 11:59 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-20 10:56 per-tagset SRCU struct and quiesce Christoph Hellwig
2022-10-20 10:56 ` [PATCH 1/8] block: set the disk capacity to 0 in blk_mark_disk_dead Christoph Hellwig
2022-10-20 13:16 ` Sagi Grimberg
2022-10-21 1:09 ` Ming Lei
2022-10-21 13:11 ` Christoph Hellwig
2022-10-21 1:53 ` Chao Leng
2022-10-21 6:49 ` Hannes Reinecke
2022-10-21 13:13 ` Christoph Hellwig
2022-10-21 21:12 ` Bart Van Assche
2022-10-20 10:56 ` Christoph Hellwig [this message]
2022-10-20 13:16 ` [PATCH 2/8] blk-mq: skip non-mq queues in blk_mq_quiesce_queue Sagi Grimberg
2022-10-21 1:13 ` Ming Lei
2022-10-21 13:19 ` Christoph Hellwig
2022-10-21 15:08 ` Ming Lei
2022-10-21 2:47 ` Chao Leng
2022-10-21 3:16 ` Chao Leng
2022-10-21 6:49 ` Hannes Reinecke
2022-10-20 10:56 ` [PATCH 3/8] blk-mq: move the srcu_struct used for quiescing to the tagset Christoph Hellwig
2022-10-20 13:23 ` Sagi Grimberg
2022-10-20 17:26 ` Keith Busch
2022-10-21 13:20 ` Christoph Hellwig
2022-10-21 1:41 ` Ming Lei
2022-10-21 2:49 ` Chao Leng
2022-10-21 6:50 ` Hannes Reinecke
2022-10-21 7:16 ` Chao Leng
2022-10-21 13:22 ` Christoph Hellwig
2022-10-20 10:56 ` [PATCH 4/8] blk-mq: pass a tagset to blk_mq_wait_quiesce_done Christoph Hellwig
2022-10-20 13:23 ` Sagi Grimberg
2022-10-21 1:46 ` Ming Lei
2022-10-21 13:23 ` Christoph Hellwig
2022-10-21 2:49 ` Chao Leng
2022-10-21 6:50 ` Hannes Reinecke
2022-10-21 21:18 ` Bart Van Assche
2022-10-20 10:56 ` [PATCH 5/8] blk-mq: add tagset quiesce interface Christoph Hellwig
2022-10-20 13:24 ` Sagi Grimberg
2022-10-21 1:53 ` Ming Lei
2022-10-21 2:49 ` Chao Leng
2022-10-21 6:51 ` Hannes Reinecke
2022-10-21 21:22 ` Bart Van Assche
2022-10-24 1:57 ` Chao Leng
2022-10-24 13:35 ` Bart Van Assche
2022-10-25 1:38 ` Chao Leng
2022-10-20 10:56 ` [PATCH 6/8] nvme: move the NS_DEAD flag to the controller Christoph Hellwig
2022-10-20 13:30 ` Sagi Grimberg
2022-10-21 13:28 ` Christoph Hellwig
2022-10-24 8:43 ` Sagi Grimberg
2022-10-24 8:50 ` Sagi Grimberg
2022-10-21 2:49 ` Chao Leng
2022-10-21 6:51 ` Hannes Reinecke
2022-10-20 10:56 ` [PATCH 7/8] nvme: remove nvme_set_queue_dying Christoph Hellwig
2022-10-20 13:10 ` Sagi Grimberg
2022-10-21 13:29 ` Christoph Hellwig
2022-10-24 8:48 ` Sagi Grimberg
2022-10-21 2:50 ` Chao Leng
2022-10-21 6:52 ` Hannes Reinecke
2022-10-20 10:56 ` [PATCH 8/8] nvme: use blk_mq_[un]quiesce_tagset Christoph Hellwig
2022-10-20 13:35 ` Sagi Grimberg
2022-10-21 2:50 ` Chao Leng
2022-10-21 6:52 ` Hannes Reinecke
2022-10-20 13:16 ` per-tagset SRCU struct and quiesce Sagi Grimberg
2022-10-21 18:06 ` Keith Busch
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