From: Jens Axboe <axboe@kernel.dk>
To: Jonathan Corbet <corbet@lwn.net>
Cc: linux-fsdevel@vger.kernel.org, linux-aio@kvack.org,
linux-block@vger.kernel.org, linux-arch@vger.kernel.org,
hch@lst.de, jmoyer@redhat.com, avi@scylladb.com
Subject: Re: [PATCH 05/16] Add io_uring IO interface
Date: Tue, 15 Jan 2019 10:26:22 -0700 [thread overview]
Message-ID: <a101eebf-d232-7a31-ee81-ba43c36ff794@kernel.dk> (raw)
In-Reply-To: <5e1fe0b7-7998-d15d-267b-4dbbc01b0b53@kernel.dk>
On 1/15/19 9:55 AM, Jens Axboe wrote:
> On 1/15/19 9:51 AM, Jonathan Corbet wrote:
>> On Mon, 14 Jan 2019 19:55:20 -0700
>> Jens Axboe <axboe@kernel.dk> wrote:
>>
>> So the [0/16] cover letter seems to have gone astray this time?
>
> It did go out, but I forgot to add a Subject line to it...
>
> https://marc.info/?l=linux-block&m=154752095709422&w=2
>
>
>>> The submission queue (SQ) and completion queue (CQ) rings are shared
>>> between the application and the kernel. This eliminates the need to
>>> copy data back and forth to submit and complete IO.
>>>
>>> IO submissions use the io_uring_sqe data structure, and completions
>>> are generated in the form of io_uring_sqe data structures. The SQ
>>> ring is an index into the io_uring_sqe array, which makes it possible
>>> to submit a batch of IOs without them being contiguous in the ring.
>>> The CQ ring is always contiguous, as completion events are inherently
>>> unordered and can point to any io_uring_iocb.
>>>
>>> Two new system calls are added for this:
>>>
>>> io_uring_setup(entries, iovecs, params)
>>> Sets up a context for doing async IO. On success, returns a file
>>> descriptor that the application can mmap to gain access to the
>>> SQ ring, CQ ring, and io_uring_iocbs.
>>
>> Looking at the code, it would appear that the "iovecs" parameter doesn't
>> actually exist.
>
> Indeed, need to update that commit message. and io_uring_iocbs should
> now be io_uring_sqes.
>
> The iovec/file registration is done through io_uring_register(2).
Updated commit message which covers both this one, and the
IORING_ENTER_GETEVENTS below.
http://git.kernel.dk/cgit/linux-block/commit/?h=io_uring&id=d14a06629baef2b0701dbd01ac9c9066f73065ec
--
Jens Axboe
--
To unsubscribe, send a message with 'unsubscribe linux-aio' in
the body to majordomo@kvack.org. For more info on Linux AIO,
see: http://www.kvack.org/aio/
Don't email: <a href=mailto:"aart@kvack.org">aart@kvack.org</a>
WARNING: multiple messages have this Message-ID (diff)
From: Jens Axboe <axboe@kernel.dk>
To: Jonathan Corbet <corbet@lwn.net>
Cc: linux-fsdevel@vger.kernel.org, linux-aio@kvack.org,
linux-block@vger.kernel.org, linux-arch@vger.kernel.org,
hch@lst.de, jmoyer@redhat.com, avi@scylladb.com
Subject: Re: [PATCH 05/16] Add io_uring IO interface
Date: Tue, 15 Jan 2019 10:26:22 -0700 [thread overview]
Message-ID: <a101eebf-d232-7a31-ee81-ba43c36ff794@kernel.dk> (raw)
Message-ID: <20190115172622.RRYbPDDA4YAdVe0ZsbFgcw8kCAufGPC3wiQBwge0Yh0@z> (raw)
In-Reply-To: <5e1fe0b7-7998-d15d-267b-4dbbc01b0b53@kernel.dk>
On 1/15/19 9:55 AM, Jens Axboe wrote:
> On 1/15/19 9:51 AM, Jonathan Corbet wrote:
>> On Mon, 14 Jan 2019 19:55:20 -0700
>> Jens Axboe <axboe@kernel.dk> wrote:
>>
>> So the [0/16] cover letter seems to have gone astray this time?
>
> It did go out, but I forgot to add a Subject line to it...
>
> https://marc.info/?l=linux-block&m=154752095709422&w=2
>
>
>>> The submission queue (SQ) and completion queue (CQ) rings are shared
>>> between the application and the kernel. This eliminates the need to
>>> copy data back and forth to submit and complete IO.
>>>
>>> IO submissions use the io_uring_sqe data structure, and completions
>>> are generated in the form of io_uring_sqe data structures. The SQ
>>> ring is an index into the io_uring_sqe array, which makes it possible
>>> to submit a batch of IOs without them being contiguous in the ring.
>>> The CQ ring is always contiguous, as completion events are inherently
>>> unordered and can point to any io_uring_iocb.
>>>
>>> Two new system calls are added for this:
>>>
>>> io_uring_setup(entries, iovecs, params)
>>> Sets up a context for doing async IO. On success, returns a file
>>> descriptor that the application can mmap to gain access to the
>>> SQ ring, CQ ring, and io_uring_iocbs.
>>
>> Looking at the code, it would appear that the "iovecs" parameter doesn't
>> actually exist.
>
> Indeed, need to update that commit message. and io_uring_iocbs should
> now be io_uring_sqes.
>
> The iovec/file registration is done through io_uring_register(2).
Updated commit message which covers both this one, and the
IORING_ENTER_GETEVENTS below.
http://git.kernel.dk/cgit/linux-block/commit/?h=io_uring&id=d14a06629baef2b0701dbd01ac9c9066f73065ec
--
Jens Axboe
next prev parent reply other threads:[~2019-01-15 17:26 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-15 2:55 (unknown), Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 01/16] fs: add an iopoll method to struct file_operations Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 02/16] block: wire up block device iopoll method Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 03/16] block: add bio_set_polled() helper Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 04/16] iomap: wire up the iopoll method Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 05/16] Add io_uring IO interface Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-15 16:51 ` Jonathan Corbet
2019-01-15 16:51 ` Jonathan Corbet
2019-01-15 16:55 ` Jens Axboe
2019-01-15 16:55 ` Jens Axboe
2019-01-15 17:26 ` Jens Axboe [this message]
2019-01-15 17:26 ` Jens Axboe
2019-01-16 10:41 ` Arnd Bergmann
2019-01-16 10:41 ` Arnd Bergmann
2019-01-16 11:00 ` Arnd Bergmann
2019-01-16 11:00 ` Arnd Bergmann
2019-01-16 15:12 ` Jens Axboe
2019-01-16 15:12 ` Jens Axboe
2019-01-16 15:16 ` Arnd Bergmann
2019-01-16 15:16 ` Arnd Bergmann
2019-01-16 15:25 ` Jens Axboe
2019-01-16 15:25 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 06/16] io_uring: add fsync support Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 07/16] io_uring: support for IO polling Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 08/16] io_uring: add submission side request cache Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 09/16] fs: add fget_many() and fput_many() Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 10/16] io_uring: use fget/fput_many() for file references Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 11/16] io_uring: batch io_kiocb allocation Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 12/16] block: implement bio helper to add iter bvec pages to bio Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 13/16] io_uring: add support for pre-mapped user IO buffers Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-16 10:53 ` Arnd Bergmann
2019-01-16 15:14 ` Jens Axboe
2019-01-16 15:14 ` Jens Axboe
2019-01-16 15:32 ` Jens Axboe
2019-01-16 15:32 ` Jens Axboe
2019-01-16 15:41 ` Arnd Bergmann
2019-01-16 15:47 ` Jens Axboe
2019-01-16 15:47 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 14/16] io_uring: add submission polling Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 15/16] io_uring: add file registration Jens Axboe
2019-01-15 2:55 ` Jens Axboe
2019-01-16 10:45 ` Arnd Bergmann
2019-01-16 10:45 ` Arnd Bergmann
2019-01-16 15:15 ` Jens Axboe
2019-01-16 15:15 ` Jens Axboe
2019-01-15 2:55 ` [PATCH 16/16] io_uring: add io_uring_event cache hit information Jens Axboe
2019-01-15 2:55 ` Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
2019-01-12 21:29 [PATCHSET v3] io_uring IO interface Jens Axboe
2019-01-12 21:30 ` [PATCH 05/16] Add " Jens Axboe
2019-01-12 21:30 ` Jens Axboe
2019-01-08 16:56 [PATCHSET v1] " Jens Axboe
2019-01-08 16:56 ` [PATCH 05/16] Add " Jens Axboe
2019-01-08 16:56 ` Jens Axboe
2019-01-09 12:10 ` Christoph Hellwig
2019-01-09 15:53 ` Jens Axboe
2019-01-09 15:53 ` Jens Axboe
2019-01-09 18:30 ` Christoph Hellwig
2019-01-09 18:30 ` Christoph Hellwig
2019-01-09 20:07 ` Jens Axboe
2019-01-09 20:07 ` Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=a101eebf-d232-7a31-ee81-ba43c36ff794@kernel.dk \
--to=axboe@kernel.dk \
--cc=avi@scylladb.com \
--cc=corbet@lwn.net \
--cc=hch@lst.de \
--cc=jmoyer@redhat.com \
--cc=linux-aio@kvack.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-block@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.