From: Jens Axboe <axboe@fb.com>
To: Keith Busch <keith.busch@intel.com>, Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>,
Max Gurtovoy <maxg@mellanox.com>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>
Subject: Re: [PATCH 01/13] block: move queues types to the block layer
Date: Thu, 29 Nov 2018 20:25:10 +0000 [thread overview]
Message-ID: <74fb1df7-f1c4-93e9-0340-4c11e5147a9d@fb.com> (raw)
In-Reply-To: <20181129201914.GB9377@localhost.localdomain>
On 11/29/18 1:19 PM, Keith Busch wrote:
> On Thu, Nov 29, 2018 at 08:12:58PM +0100, Christoph Hellwig wrote:
>> +enum hctx_type {
>> + HCTX_TYPE_DEFAULT, /* all I/O not otherwise accounted for */
>> + HCTX_TYPE_READ, /* just for READ I/O */
>> + HCTX_TYPE_POLL, /* polled I/O of any kind */
>> +
>> + HCTX_MAX_TYPES,
>> };
>
> Well, there goes my plan to use this with Weighted-Round-Robin NVMe IO
> queues!
>
> I'm not that sad about it, though.
That's why I wanted these to be driver private, so you could just expand
at will. But it's not like we can't do that now, we'll just add some
extra types in here. The downside is that if we have a bunch of drivers
having dis-separate queues, then we end up with a bigger MAX number than
we would have with driver private queues.
IOW, I don't think this is ruining anything for you.
--
Jens Axboe
WARNING: multiple messages have this Message-ID (diff)
From: axboe@fb.com (Jens Axboe)
Subject: [PATCH 01/13] block: move queues types to the block layer
Date: Thu, 29 Nov 2018 20:25:10 +0000 [thread overview]
Message-ID: <74fb1df7-f1c4-93e9-0340-4c11e5147a9d@fb.com> (raw)
In-Reply-To: <20181129201914.GB9377@localhost.localdomain>
On 11/29/18 1:19 PM, Keith Busch wrote:
> On Thu, Nov 29, 2018@08:12:58PM +0100, Christoph Hellwig wrote:
>> +enum hctx_type {
>> + HCTX_TYPE_DEFAULT, /* all I/O not otherwise accounted for */
>> + HCTX_TYPE_READ, /* just for READ I/O */
>> + HCTX_TYPE_POLL, /* polled I/O of any kind */
>> +
>> + HCTX_MAX_TYPES,
>> };
>
> Well, there goes my plan to use this with Weighted-Round-Robin NVMe IO
> queues!
>
> I'm not that sad about it, though.
That's why I wanted these to be driver private, so you could just expand
at will. But it's not like we can't do that now, we'll just add some
extra types in here. The downside is that if we have a bunch of drivers
having dis-separate queues, then we end up with a bigger MAX number than
we would have with driver private queues.
IOW, I don't think this is ruining anything for you.
--
Jens Axboe
next prev parent reply other threads:[~2018-11-29 20:25 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-29 19:12 block and nvme polling improvements V2 Christoph Hellwig
2018-11-29 19:12 ` Christoph Hellwig
2018-11-29 19:12 ` [PATCH 01/13] block: move queues types to the block layer Christoph Hellwig
2018-11-29 19:12 ` Christoph Hellwig
2018-11-29 19:50 ` Jens Axboe
2018-11-29 19:50 ` Jens Axboe
2018-11-30 7:56 ` Christoph Hellwig
2018-11-30 7:56 ` Christoph Hellwig
2018-11-30 15:20 ` Jens Axboe
2018-11-30 15:20 ` Jens Axboe
2018-11-30 15:21 ` Christoph Hellwig
2018-11-30 15:21 ` Christoph Hellwig
2018-11-29 20:19 ` Keith Busch
2018-11-29 20:19 ` Keith Busch
2018-11-29 20:25 ` Jens Axboe [this message]
2018-11-29 20:25 ` Jens Axboe
2018-11-30 8:00 ` Christoph Hellwig
2018-11-30 8:00 ` Christoph Hellwig
2018-11-30 14:40 ` Keith Busch
2018-11-30 14:40 ` Keith Busch
2018-11-30 15:20 ` Jens Axboe
2018-11-30 15:20 ` Jens Axboe
2018-11-29 19:12 ` [PATCH 02/13] nvme-pci: use atomic bitops to mark a queue enabled Christoph Hellwig
2018-11-29 19:12 ` Christoph Hellwig
2018-11-29 20:19 ` Keith Busch
2018-11-29 20:19 ` Keith Busch
2018-11-29 19:13 ` [PATCH 03/13] nvme-pci: cleanup SQ allocation a bit Christoph Hellwig
2018-11-29 19:13 ` Christoph Hellwig
2018-11-29 20:22 ` Keith Busch
2018-11-29 20:22 ` Keith Busch
2018-11-29 19:13 ` [PATCH 04/13] nvme-pci: only allow polling with separate poll queues Christoph Hellwig
2018-11-29 19:13 ` Christoph Hellwig
2018-11-29 19:13 ` [PATCH 05/13] nvme-pci: consolidate code for polling non-dedicated queues Christoph Hellwig
2018-11-29 19:13 ` Christoph Hellwig
2018-11-29 19:13 ` [PATCH 06/13] nvme-pci: refactor nvme_disable_io_queues Christoph Hellwig
2018-11-29 19:13 ` Christoph Hellwig
2018-11-29 20:37 ` Keith Busch
2018-11-29 20:37 ` Keith Busch
2018-11-29 19:13 ` [PATCH 07/13] nvme-pci: don't poll from irq context when deleting queues Christoph Hellwig
2018-11-29 19:13 ` Christoph Hellwig
2018-11-29 20:36 ` Keith Busch
2018-11-29 20:36 ` Keith Busch
2018-11-30 8:08 ` Christoph Hellwig
2018-11-30 8:08 ` Christoph Hellwig
2018-11-30 14:45 ` Keith Busch
2018-11-30 14:45 ` Keith Busch
2018-11-29 19:13 ` [PATCH 08/13] nvme-pci: remove the CQ lock for interrupt driven queues Christoph Hellwig
2018-11-29 19:13 ` Christoph Hellwig
2018-11-29 21:08 ` Keith Busch
2018-11-29 21:08 ` Keith Busch
2018-11-30 8:16 ` Christoph Hellwig
2018-11-30 8:16 ` Christoph Hellwig
2018-11-29 19:13 ` [PATCH 09/13] nvme-rdma: remove I/O polling support Christoph Hellwig
2018-11-29 19:13 ` Christoph Hellwig
2018-11-29 19:13 ` [PATCH 10/13] nvme-mpath: " Christoph Hellwig
2018-11-29 19:13 ` Christoph Hellwig
2018-11-29 19:13 ` [PATCH 11/13] block: remove ->poll_fn Christoph Hellwig
2018-11-29 19:13 ` Christoph Hellwig
2018-11-29 19:13 ` [PATCH 12/13] block: only allow polling if a poll queue_map exists Christoph Hellwig
2018-11-29 19:13 ` Christoph Hellwig
2018-11-29 19:13 ` [PATCH 13/13] block: enable polling by default if a poll map is initalized Christoph Hellwig
2018-11-29 19:13 ` Christoph Hellwig
-- strict thread matches above, loose matches on Subject: below --
2018-12-02 16:46 block and nvme polling improvements V3 Christoph Hellwig
2018-12-02 16:46 ` [PATCH 01/13] block: move queues types to the block layer Christoph Hellwig
2018-12-02 16:46 ` Christoph Hellwig
2018-12-04 0:49 ` Sagi Grimberg
2018-12-04 0:49 ` Sagi Grimberg
2018-12-04 15:00 ` Christoph Hellwig
2018-12-04 15:00 ` Christoph Hellwig
2018-12-04 17:08 ` Sagi Grimberg
2018-12-04 17:08 ` Sagi Grimberg
2018-11-21 16:23 block and nvme polling improvements Christoph Hellwig
2018-11-21 16:23 ` [PATCH 01/13] block: move queues types to the block layer Christoph Hellwig
2018-11-21 16:23 ` Christoph Hellwig
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