From: Pavel Begunkov <asml.silence@gmail.com>
To: Jens Axboe <axboe@kernel.dk>, io-uring@vger.kernel.org
Subject: [PATCH 01/14] io_uring: optimise io_rw_reissue()
Date: Tue, 19 Jan 2021 13:32:34 +0000 [thread overview]
Message-ID: <c0da843b0707e793e6a8a9ffc52e8d7eb8a2d37f.1611062505.git.asml.silence@gmail.com> (raw)
In-Reply-To: <cover.1611062505.git.asml.silence@gmail.com>
The hot path is IO completing on the first try. Reshuffle io_rw_reissue() so
it's checked first.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
fs/io_uring.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 4bcabc51fc5a..7f4bc5092b5c 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2713,12 +2713,13 @@ static bool io_resubmit_prep(struct io_kiocb *req, int error)
static bool io_rw_reissue(struct io_kiocb *req, long res)
{
#ifdef CONFIG_BLOCK
- umode_t mode = file_inode(req->file)->i_mode;
+ umode_t mode;
int ret;
- if (!S_ISBLK(mode) && !S_ISREG(mode))
+ if (res != -EAGAIN && res != -EOPNOTSUPP)
return false;
- if ((res != -EAGAIN && res != -EOPNOTSUPP) || io_wq_current_is_worker())
+ mode = file_inode(req->file)->i_mode;
+ if ((!S_ISBLK(mode) && !S_ISREG(mode)) || io_wq_current_is_worker())
return false;
lockdep_assert_held(&req->ctx->uring_lock);
--
2.24.0
next prev parent reply other threads:[~2021-01-19 14:57 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-19 13:32 [PATCH for-next 00/14] mostly cleanups for 5.12 Pavel Begunkov
2021-01-19 13:32 ` Pavel Begunkov [this message]
2021-01-19 13:32 ` [PATCH 02/14] io_uring: refactor io_resubmit_prep() Pavel Begunkov
2021-01-19 13:32 ` [PATCH 03/14] io_uring: cleanup personalities under uring_lock Pavel Begunkov
2021-01-19 13:32 ` [PATCH 04/14] io_uring: inline io_async_submit() Pavel Begunkov
2021-01-19 13:32 ` [PATCH 05/14] io_uring: inline __io_commit_cqring() Pavel Begunkov
2021-01-19 13:32 ` [PATCH 06/14] io_uring: further deduplicate #CQ events calc Pavel Begunkov
2021-01-19 13:32 ` [PATCH 07/14] io_uring: simplify io_alloc_req() Pavel Begunkov
2021-01-19 13:32 ` [PATCH 08/14] io_uring: remove __io_state_file_put Pavel Begunkov
2021-01-19 13:32 ` [PATCH 09/14] io_uring: deduplicate failing task_work_add Pavel Begunkov
2021-01-19 13:32 ` [PATCH 10/14] io_uring: don't block resource recycle by oveflows Pavel Begunkov
2021-01-19 22:59 ` Jens Axboe
2021-01-19 23:08 ` Pavel Begunkov
2021-01-19 13:32 ` [PATCH 11/14] io_uring: add a helper timeout mode calculation Pavel Begunkov
2021-01-19 13:32 ` [PATCH 12/14] io_uring: help inlining of io_req_complete() Pavel Begunkov
2021-01-19 13:32 ` [PATCH 13/14] io_uring: don't flush CQEs deep down the stack Pavel Begunkov
2021-01-19 13:32 ` [PATCH 14/14] io_uring: save atomic dec for inline executed reqs Pavel Begunkov
2021-01-19 23:01 ` [PATCH for-next 00/14] mostly cleanups for 5.12 Jens Axboe
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