From: Bart Van Assche <bart.vanassche@sandisk.com>
To: Ming Lei <tom.leiming@gmail.com>
Cc: Jens Axboe <axboe@fb.com>, Christoph Hellwig <hch@lst.de>,
James Bottomley <jejb@linux.vnet.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Mike Snitzer <snitzer@redhat.com>,
Doug Ledford <dledford@redhat.com>,
Keith Busch <keith.busch@intel.com>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>
Subject: Re: [PATCH 5/9] block: Extend blk_freeze_queue_start() to the non-blk-mq path
Date: Tue, 27 Sep 2016 08:55:42 -0700 [thread overview]
Message-ID: <d15c920e-8333-b970-4e8c-4a3fbf148bb4@sandisk.com> (raw)
In-Reply-To: <a8e8796e-7266-4c8a-a4eb-31cedf73ec8a@sandisk.com>
On 09/27/2016 07:42 AM, Bart Van Assche wrote:
> Jens, regarding non-blk-mq mode and q_usage_counter: do you prefer that
> I rework patch 8/9 such that blk_quiesce_queue() and blk_resume_queue()
> are only used in blk-mq mode or are you OK with adding a
> blk_queue_enter() call in get_request() and a blk_queue_exit() call to
> __blk_put_request()?
(replying to my own e-mail)
Although it is easy to make q_usage_counter count non-blk-mq requests,
extending the blk_quiesce_queue() waiting mechanism to the non-blk-mq
path is non-trivial. To limit the number of changes in this patch series
I will drop the non-blk-mq changes from this patch series.
Bart.
WARNING: multiple messages have this Message-ID (diff)
From: Bart Van Assche <bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
To: Ming Lei <tom.leiming-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Jens Axboe <axboe-b10kYP2dOMg@public.gmane.org>,
Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>,
James Bottomley
<jejb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>,
"Martin K. Petersen"
<martin.petersen-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>,
Mike Snitzer <snitzer-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Keith Busch <keith.busch-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Subject: Re: [PATCH 5/9] block: Extend blk_freeze_queue_start() to the non-blk-mq path
Date: Tue, 27 Sep 2016 08:55:42 -0700 [thread overview]
Message-ID: <d15c920e-8333-b970-4e8c-4a3fbf148bb4@sandisk.com> (raw)
In-Reply-To: <a8e8796e-7266-4c8a-a4eb-31cedf73ec8a-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
On 09/27/2016 07:42 AM, Bart Van Assche wrote:
> Jens, regarding non-blk-mq mode and q_usage_counter: do you prefer that
> I rework patch 8/9 such that blk_quiesce_queue() and blk_resume_queue()
> are only used in blk-mq mode or are you OK with adding a
> blk_queue_enter() call in get_request() and a blk_queue_exit() call to
> __blk_put_request()?
(replying to my own e-mail)
Although it is easy to make q_usage_counter count non-blk-mq requests,
extending the blk_quiesce_queue() waiting mechanism to the non-blk-mq
path is non-trivial. To limit the number of changes in this patch series
I will drop the non-blk-mq changes from this patch series.
Bart.
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WARNING: multiple messages have this Message-ID (diff)
From: bart.vanassche@sandisk.com (Bart Van Assche)
Subject: [PATCH 5/9] block: Extend blk_freeze_queue_start() to the non-blk-mq path
Date: Tue, 27 Sep 2016 08:55:42 -0700 [thread overview]
Message-ID: <d15c920e-8333-b970-4e8c-4a3fbf148bb4@sandisk.com> (raw)
In-Reply-To: <a8e8796e-7266-4c8a-a4eb-31cedf73ec8a@sandisk.com>
On 09/27/2016 07:42 AM, Bart Van Assche wrote:
> Jens, regarding non-blk-mq mode and q_usage_counter: do you prefer that
> I rework patch 8/9 such that blk_quiesce_queue() and blk_resume_queue()
> are only used in blk-mq mode or are you OK with adding a
> blk_queue_enter() call in get_request() and a blk_queue_exit() call to
> __blk_put_request()?
(replying to my own e-mail)
Although it is easy to make q_usage_counter count non-blk-mq requests,
extending the blk_quiesce_queue() waiting mechanism to the non-blk-mq
path is non-trivial. To limit the number of changes in this patch series
I will drop the non-blk-mq changes from this patch series.
Bart.
next prev parent reply other threads:[~2016-09-27 15:55 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 [this message]
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
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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