public inbox for [email protected]
 help / color / mirror / Atom feed
From: Pavel Begunkov <[email protected]>
To: Jens Axboe <[email protected]>, [email protected]
Subject: [RFC][PATCH 0/3] allow to skip CQE posting
Date: Sat, 11 Sep 2021 14:51:59 +0100	[thread overview]
Message-ID: <[email protected]> (raw)

It's expensive enough to post an CQE, and there are other
reasons to want to ignore them, e.g. for link handling and
it may just be more convenient for the userspace.

Try to cover most of the use cases with one flag. The overhead
is one "if (cqe->flags & IOSQE_CQE_SKIP_SUCCESS)" check per
requests and a bit bloated req_set_fail(), should be bearable.

See 2/3 for the actual description of the flag.

Pavel Begunkov (3):
  io_uring: clean cqe filling functions
  io_uring: add option to skip CQE posting
  io_uring: don't spinlock when not posting CQEs

 fs/io_uring.c                 | 103 ++++++++++++++++++++++------------
 include/uapi/linux/io_uring.h |   3 +
 2 files changed, 70 insertions(+), 36 deletions(-)

-- 
2.33.0


             reply	other threads:[~2021-09-11 13:52 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-11 13:51 Pavel Begunkov [this message]
2021-09-11 13:52 ` [PATCH 1/3] io_uring: clean cqe filling functions Pavel Begunkov
2021-09-12 18:24   ` Hao Xu
2021-09-12 23:20     ` Pavel Begunkov
2021-09-11 13:52 ` [PATCH 2/3] io_uring: add option to skip CQE posting Pavel Begunkov
2021-09-11 13:52 ` [PATCH 3/3] io_uring: don't spinlock when not posting CQEs Pavel Begunkov
2021-09-11 20:12   ` Hao Xu
2021-09-11 21:10     ` Pavel Begunkov
2021-09-12 18:14       ` Hao Xu
2021-09-12 22:16         ` Pavel Begunkov
2021-09-12 23:49 ` [RFC][PATCH 0/3] allow to skip CQE posting Pavel Begunkov

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 \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox