From: Sagi Grimberg <sagi@grimberg.me> To: linux-nvme@lists.infradead.org, Christoph Hellwig <hch@lst.de>, Keith Busch <kbusch@kernel.org>, Jens Axboe <axboe@kernel.dk> Cc: linux-block@vger.kernel.org, Ming Lin <mlin@kernel.org>, Chao Leng <lengchao@huawei.com> Subject: [PATCH v4 2/2] nvme: improve quiesce time for large amount of namespaces Date: Mon, 27 Jul 2020 15:07:17 -0700 [thread overview] Message-ID: <20200727220717.278116-3-sagi@grimberg.me> (raw) In-Reply-To: <20200727220717.278116-1-sagi@grimberg.me> nvme currently will synchronize queue quiesce for each namespace at once. This can slow down failover time (which first quiesce all ns queues) if we have a large amount of namespaces. Instead, we want to use an async interface and do the namespaces quiesce in parallel rather than serially. Signed-off-by: Sagi Grimberg <sagi@grimberg.me> --- drivers/nvme/host/core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 05aa568a60af..e8cc728dee46 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -4561,7 +4561,9 @@ void nvme_stop_queues(struct nvme_ctrl *ctrl) down_read(&ctrl->namespaces_rwsem); list_for_each_entry(ns, &ctrl->namespaces, list) - blk_mq_quiesce_queue(ns->queue); + blk_mq_quiesce_queue_async(ns->queue); + list_for_each_entry(ns, &ctrl->namespaces, list) + blk_mq_quiesce_queue_async_wait(ns->queue); up_read(&ctrl->namespaces_rwsem); } EXPORT_SYMBOL_GPL(nvme_stop_queues); -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Sagi Grimberg <sagi@grimberg.me> To: linux-nvme@lists.infradead.org, Christoph Hellwig <hch@lst.de>, Keith Busch <kbusch@kernel.org>, Jens Axboe <axboe@kernel.dk> Cc: linux-block@vger.kernel.org, Ming Lin <mlin@kernel.org>, Chao Leng <lengchao@huawei.com> Subject: [PATCH v4 2/2] nvme: improve quiesce time for large amount of namespaces Date: Mon, 27 Jul 2020 15:07:17 -0700 [thread overview] Message-ID: <20200727220717.278116-3-sagi@grimberg.me> (raw) In-Reply-To: <20200727220717.278116-1-sagi@grimberg.me> nvme currently will synchronize queue quiesce for each namespace at once. This can slow down failover time (which first quiesce all ns queues) if we have a large amount of namespaces. Instead, we want to use an async interface and do the namespaces quiesce in parallel rather than serially. Signed-off-by: Sagi Grimberg <sagi@grimberg.me> --- drivers/nvme/host/core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 05aa568a60af..e8cc728dee46 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -4561,7 +4561,9 @@ void nvme_stop_queues(struct nvme_ctrl *ctrl) down_read(&ctrl->namespaces_rwsem); list_for_each_entry(ns, &ctrl->namespaces, list) - blk_mq_quiesce_queue(ns->queue); + blk_mq_quiesce_queue_async(ns->queue); + list_for_each_entry(ns, &ctrl->namespaces, list) + blk_mq_quiesce_queue_async_wait(ns->queue); up_read(&ctrl->namespaces_rwsem); } EXPORT_SYMBOL_GPL(nvme_stop_queues); -- 2.25.1 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme
next prev parent reply other threads:[~2020-07-27 22:07 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-27 22:07 [PATCH v4 0/2] improve quiesce time for large amount of namespaces Sagi Grimberg 2020-07-27 22:07 ` Sagi Grimberg 2020-07-27 22:07 ` [PATCH v4 1/2] blk-mq: add async quiesce interface Sagi Grimberg 2020-07-27 22:07 ` Sagi Grimberg 2020-07-27 22:13 ` Jens Axboe 2020-07-27 22:13 ` Jens Axboe 2020-07-27 22:37 ` Sagi Grimberg 2020-07-27 22:37 ` Sagi Grimberg 2020-07-27 22:07 ` Sagi Grimberg [this message] 2020-07-27 22:07 ` [PATCH v4 2/2] nvme: improve quiesce time for large amount of namespaces Sagi Grimberg
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