From: "Steve Wise" <swise@opengridcomputing.com>
To: "'Bart Van Assche'" <bart.vanassche@sandisk.com>,
"'Jens Axboe'" <axboe@fb.com>
Cc: <linux-block@vger.kernel.org>,
"'James Bottomley'" <jejb@linux.vnet.ibm.com>,
"'Martin K. Petersen'" <martin.petersen@oracle.com>,
"'Mike Snitzer'" <snitzer@redhat.com>,
<linux-rdma@vger.kernel.org>, <linux-nvme@lists.infradead.org>,
"'Keith Busch'" <keith.busch@intel.com>,
"'Doug Ledford'" <dledford@redhat.com>,
<linux-scsi@vger.kernel.org>, "'Christoph Hellwig'" <hch@lst.de>
Subject: RE: [PATCH 9/9] [RFC] nvme: Fix a race condition
Date: Tue, 27 Sep 2016 11:31:03 -0500 [thread overview]
Message-ID: <013c01d218dc$8a5406c0$9efc1440$@opengridcomputing.com> (raw)
In-Reply-To: <9c372b04-a194-58c4-a64f-b155b52a5244@sandisk.com>
> @@ -2079,11 +2075,15 @@ EXPORT_SYMBOL_GPL(nvme_kill_queues);
> void nvme_stop_queues(struct nvme_ctrl *ctrl)
> {
> struct nvme_ns *ns;
> + struct request_queue *q;
>
> mutex_lock(&ctrl->namespaces_mutex);
> list_for_each_entry(ns, &ctrl->namespaces, list) {
> - blk_mq_cancel_requeue_work(ns->queue);
> - blk_mq_stop_hw_queues(ns->queue);
> + q = ns->queue;
> + blk_quiesce_queue(q);
> + blk_mq_cancel_requeue_work(q);
> + blk_mq_stop_hw_queues(q);
> + blk_resume_queue(q);
> }
> mutex_unlock(&ctrl->namespaces_mutex);
Hey Bart, should nvme_stop_queues() really be resuming the blk queue?
WARNING: multiple messages have this Message-ID (diff)
From: "Steve Wise" <swise@opengridcomputing.com>
To: 'Bart Van Assche' <bart.vanassche@sandisk.com>,
'Jens Axboe' <axboe@fb.com>
Cc: linux-block@vger.kernel.org,
'James Bottomley' <jejb@linux.vnet.ibm.com>,
"'Martin K. Petersen'" <martin.petersen@oracle.com>,
'Mike Snitzer' <snitzer@redhat.com>,
linux-rdma@vger.kernel.org, linux-nvme@lists.infradead.org,
'Keith Busch' <keith.busch@intel.com>,
'Doug Ledford' <dledford@redhat.com>,
linux-scsi@vger.kernel.org, 'Christoph Hellwig' <hch@lst.de>
Subject: RE: [PATCH 9/9] [RFC] nvme: Fix a race condition
Date: Tue, 27 Sep 2016 11:31:03 -0500 [thread overview]
Message-ID: <013c01d218dc$8a5406c0$9efc1440$@opengridcomputing.com> (raw)
In-Reply-To: <9c372b04-a194-58c4-a64f-b155b52a5244@sandisk.com>
> @@ -2079,11 +2075,15 @@ EXPORT_SYMBOL_GPL(nvme_kill_queues);
> void nvme_stop_queues(struct nvme_ctrl *ctrl)
> {
> struct nvme_ns *ns;
> + struct request_queue *q;
>
> mutex_lock(&ctrl->namespaces_mutex);
> list_for_each_entry(ns, &ctrl->namespaces, list) {
> - blk_mq_cancel_requeue_work(ns->queue);
> - blk_mq_stop_hw_queues(ns->queue);
> + q = ns->queue;
> + blk_quiesce_queue(q);
> + blk_mq_cancel_requeue_work(q);
> + blk_mq_stop_hw_queues(q);
> + blk_resume_queue(q);
> }
> mutex_unlock(&ctrl->namespaces_mutex);
Hey Bart, should nvme_stop_queues() really be resuming the blk queue?
WARNING: multiple messages have this Message-ID (diff)
From: swise@opengridcomputing.com (Steve Wise)
Subject: [PATCH 9/9] [RFC] nvme: Fix a race condition
Date: Tue, 27 Sep 2016 11:31:03 -0500 [thread overview]
Message-ID: <013c01d218dc$8a5406c0$9efc1440$@opengridcomputing.com> (raw)
In-Reply-To: <9c372b04-a194-58c4-a64f-b155b52a5244@sandisk.com>
> @@ -2079,11 +2075,15 @@ EXPORT_SYMBOL_GPL(nvme_kill_queues);
> void nvme_stop_queues(struct nvme_ctrl *ctrl)
> {
> struct nvme_ns *ns;
> + struct request_queue *q;
>
> mutex_lock(&ctrl->namespaces_mutex);
> list_for_each_entry(ns, &ctrl->namespaces, list) {
> - blk_mq_cancel_requeue_work(ns->queue);
> - blk_mq_stop_hw_queues(ns->queue);
> + q = ns->queue;
> + blk_quiesce_queue(q);
> + blk_mq_cancel_requeue_work(q);
> + blk_mq_stop_hw_queues(q);
> + blk_resume_queue(q);
> }
> mutex_unlock(&ctrl->namespaces_mutex);
Hey Bart, should nvme_stop_queues() really be resuming the blk queue?
next prev parent reply other threads:[~2016-09-27 16:31 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-26 18:25 [PATCH 0/9] Introduce blk_quiesce_queue() and blk_resume_queue() Bart Van Assche
2016-09-26 18:25 ` Bart Van Assche
2016-09-26 18:26 ` [PATCH 1/9] blk-mq: Introduce blk_mq_queue_stopped() Bart Van Assche
2016-09-26 18:26 ` Bart Van Assche
2016-09-26 18:26 ` Bart Van Assche
2016-09-27 6:20 ` Hannes Reinecke
2016-09-27 6:20 ` Hannes Reinecke
2016-09-27 7:38 ` Johannes Thumshirn
2016-09-27 7:38 ` Johannes Thumshirn
2016-09-27 7:38 ` Johannes Thumshirn
2016-09-26 18:26 ` [PATCH 2/9] dm: Fix a race condition related to stopping and starting queues Bart Van Assche
2016-09-26 18:26 ` Bart Van Assche
2016-09-27 6:21 ` Hannes Reinecke
2016-09-27 6:21 ` Hannes Reinecke
2016-09-27 6:21 ` Hannes Reinecke
2016-09-27 7:47 ` Johannes Thumshirn
2016-09-27 7:47 ` Johannes Thumshirn
2016-09-27 7:47 ` Johannes Thumshirn
2016-09-26 18:27 ` [PATCH 3/9] [RFC] nvme: Use BLK_MQ_S_STOPPED instead of QUEUE_FLAG_STOPPED in blk-mq code Bart Van Assche
2016-09-26 18:27 ` Bart Van Assche
2016-09-26 18:27 ` Bart Van Assche
2016-09-26 18:27 ` [PATCH 4/9] block: Move blk_freeze_queue() and blk_unfreeze_queue() code Bart Van Assche
2016-09-26 18:27 ` Bart Van Assche
2016-09-27 6:26 ` Hannes Reinecke
2016-09-27 6:26 ` Hannes Reinecke
2016-09-27 6:26 ` Hannes Reinecke
2016-09-27 7:52 ` Johannes Thumshirn
2016-09-27 7:52 ` Johannes Thumshirn
2016-09-27 7:52 ` Johannes Thumshirn
2016-09-26 18:27 ` [PATCH 5/9] block: Extend blk_freeze_queue_start() to the non-blk-mq path Bart Van Assche
2016-09-26 18:27 ` Bart Van Assche
2016-09-26 18:27 ` Bart Van Assche
2016-09-27 7:50 ` Johannes Thumshirn
2016-09-27 7:50 ` Johannes Thumshirn
2016-09-27 7:50 ` Johannes Thumshirn
2016-09-27 13:22 ` Ming Lei
2016-09-27 13:22 ` Ming Lei
2016-09-27 14:42 ` Bart Van Assche
2016-09-27 14:42 ` Bart Van Assche
2016-09-27 14:42 ` Bart Van Assche
2016-09-27 15:55 ` Bart Van Assche
2016-09-27 15:55 ` Bart Van Assche
2016-09-27 15:55 ` Bart Van Assche
2016-09-26 18:28 ` [PATCH 6/9] block: Rename mq_freeze_wq and mq_freeze_depth Bart Van Assche
2016-09-26 18:28 ` Bart Van Assche
2016-09-27 7:51 ` Johannes Thumshirn
2016-09-27 7:51 ` Johannes Thumshirn
2016-09-27 7:51 ` Johannes Thumshirn
2016-09-26 18:28 ` [PATCH 7/9] blk-mq: Introduce blk_quiesce_queue() and blk_resume_queue() Bart Van Assche
2016-09-26 18:28 ` Bart Van Assche
2016-09-26 18:28 ` [PATCH 8/9] SRP transport: Port srp_wait_for_queuecommand() to scsi-mq Bart Van Assche
2016-09-26 18:28 ` Bart Van Assche
2016-09-26 18:28 ` [PATCH 9/9] [RFC] nvme: Fix a race condition Bart Van Assche
2016-09-26 18:28 ` Bart Van Assche
2016-09-27 16:31 ` Steve Wise [this message]
2016-09-27 16:31 ` Steve Wise
2016-09-27 16:31 ` Steve Wise
2016-09-27 16:43 ` Bart Van Assche
2016-09-27 16:43 ` Bart Van Assche
2016-09-27 16:43 ` Bart Van Assche
2016-09-27 16:56 ` James Bottomley
2016-09-27 16:56 ` James Bottomley
2016-09-27 17:09 ` Bart Van Assche
2016-09-27 17:09 ` Bart Van Assche
2016-09-27 17:09 ` Bart Van Assche
2016-09-28 14:23 ` Steve Wise
2016-09-28 14:23 ` Steve Wise
2016-09-28 14:23 ` Steve Wise
2016-09-27 16:56 ` Steve Wise
2016-09-27 16:56 ` Steve Wise
2016-09-27 16:56 ` Steve Wise
2016-09-26 18:33 ` [PATCH 0/9] Introduce blk_quiesce_queue() and blk_resume_queue() Mike Snitzer
2016-09-26 18:33 ` Mike Snitzer
2016-09-26 18:33 ` Mike Snitzer
2016-09-26 18:46 ` Bart Van Assche
2016-09-26 18:46 ` Bart Van Assche
2016-09-26 18:46 ` Bart Van Assche
2016-09-26 22:26 ` Bart Van Assche
2016-09-26 22:26 ` Bart Van Assche
2016-09-26 22:26 ` Bart Van Assche
2016-10-11 16:27 ` Laurence Oberman
2016-10-11 16:27 ` Laurence Oberman
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