linux-kernel - [PATCH 0/2] optimise sqe-to-req flags

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Date:   Sat, 18 Jan 2020 01:41:37 +0300
From:   Pavel Begunkov <asml.silence@...il.com>
To:     Jens Axboe <axboe@...nel.dk>, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 0/2] optimise sqe-to-req flags

*lost the cover-letter, but here we go*

The main idea is to optimise code like the following by directly
copying sqe flags:

if (sqe_flags & IOSQE_IO_HARDLINK)
	req->flags |= REQ_F_HARDLINK;

The first patch is a minor cleanup, and the second one do the
trick. No functional changes.

The other thing to consider is whether to use such flags as 
REQ_F_LINK = IOSQE_IO_LINK, or directly use IOSQE_IO_LINK instead.

Pavel Begunkov (2):
  io_uring: remove REQ_F_IO_DRAINED
  io_uring: optimise sqe-to-req flags translation

 fs/io_uring.c | 65 ++++++++++++++++++++++++---------------------------
 1 file changed, 31 insertions(+), 34 deletions(-)

-- 
2.24.0