Linux-Block Archive on lore.kernel.org
 help / color / Atom feed
From: Ilya Dryomov <idryomov@gmail.com>
To: Roman Penyaev <rpenyaev@suse.de>
Cc: Jens Axboe <axboe@kernel.dk>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	linux-aio@kvack.org, linux-block <linux-block@vger.kernel.org>,
	linux-arch@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
	jmoyer@redhat.com, avi@scylladb.com,
	linux-block-owner@vger.kernel.org
Subject: Re: [PATCHSET v2] io_uring IO interface
Date: Fri, 11 Jan 2019 17:11:57 +0100
Message-ID: <CAOi1vP9B7Z5jm4vcLux8eOvixgWmC7V=zKBzGnOOJHYO1AhVwA@mail.gmail.com> (raw)
In-Reply-To: <fe686e4316f9746c46b91fd58c984531@suse.de>

On Fri, Jan 11, 2019 at 10:51 AM Roman Penyaev <rpenyaev@suse.de> wrote:
>
> Hi Jens,
>
> That is interesting.  Recently I sent an rfc related to epoll uring:
>
> https://lore.kernel.org/lkml/20190109164025.24554-1-rpenyaev@suse.de
>
> which can be mapped to userspace and all ready events can be consumed
> from it directly.  I am wondering, is it possible to make some common
> API for all kind of ready events / urings, or it doesn't make any
> sense?

I think you can use the new IOCB_CMD_POLL from Christoph and avoid
epoll_wait() in favor of aio/io_uring interface, at least in new high
performance applications.  Reaping events entirely in userspace (i.e.
performing io_getevents() without entering the kernel) has been
possible for a long time even with the existing aio interface.

Thanks,

                Ilya

  reply index

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-10  2:43 Jens Axboe
2019-01-10  2:43 ` [PATCH 01/15] fs: add an iopoll method to struct file_operations Jens Axboe
2019-01-10  2:43 ` [PATCH 02/15] block: wire up block device iopoll method Jens Axboe
2019-01-10  2:43 ` [PATCH 03/15] block: add bio_set_polled() helper Jens Axboe
2019-01-10  2:43 ` [PATCH 04/15] iomap: wire up the iopoll method Jens Axboe
2019-01-10  2:43 ` [PATCH 05/15] Add io_uring IO interface Jens Axboe
2019-01-11 18:19   ` Martin K. Petersen
2019-01-11 18:34     ` Jens Axboe
2019-01-13 16:22       ` Jens Axboe
2019-01-15 17:31         ` Martin K. Petersen
2019-01-10  2:43 ` [PATCH 06/15] io_uring: support for IO polling Jens Axboe
2019-01-10  2:43 ` [PATCH 07/15] io_uring: add submission side request cache Jens Axboe
2019-01-10  2:43 ` [PATCH 08/15] fs: add fget_many() and fput_many() Jens Axboe
2019-01-10  2:43 ` [PATCH 09/15] io_uring: use fget/fput_many() for file references Jens Axboe
2019-01-10  2:43 ` [PATCH 10/15] io_uring: batch io_kiocb allocation Jens Axboe
2019-01-10  2:44 ` [PATCH 11/15] block: implement bio helper to add iter bvec pages to bio Jens Axboe
2019-01-10  2:44 ` [PATCH 12/15] io_uring: add support for pre-mapped user IO buffers Jens Axboe
2019-01-10  2:44 ` [PATCH 13/15] io_uring: support kernel side submission Jens Axboe
2019-01-10  2:44 ` [PATCH 14/15] io_uring: add submission polling Jens Axboe
2019-01-10  2:44 ` [PATCH 15/15] io_uring: add io_uring_event cache hit information Jens Axboe
2019-01-10 23:12   ` Jeff Moyer
2019-01-10 23:47     ` Jens Axboe
2019-01-11  9:46 ` [PATCHSET v2] io_uring IO interface Roman Penyaev
2019-01-11 16:11   ` Ilya Dryomov [this message]
2019-01-11 16:21     ` Christoph Hellwig
2019-01-11 16:39     ` Roman Penyaev
2019-01-11 18:05   ` Jens Axboe

Reply instructions:

You may reply publically 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='CAOi1vP9B7Z5jm4vcLux8eOvixgWmC7V=zKBzGnOOJHYO1AhVwA@mail.gmail.com' \
    --to=idryomov@gmail.com \
    --cc=avi@scylladb.com \
    --cc=axboe@kernel.dk \
    --cc=hch@lst.de \
    --cc=jmoyer@redhat.com \
    --cc=linux-aio@kvack.org \
    --cc=linux-arch@vger.kernel.org \
    --cc=linux-block-owner@vger.kernel.org \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=rpenyaev@suse.de \
    /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

Linux-Block Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-block/0 linux-block/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-block linux-block/ https://lore.kernel.org/linux-block \
		linux-block@vger.kernel.org
	public-inbox-index linux-block

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-block


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git