diff options
| author | Pavel Begunkov <asml.silence@gmail.com> | 2021-10-23 12:14:02 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-10-25 07:42:35 -0600 |
| commit | fb27274a90eac5a687fe73229775ad36df737d8b (patch) | |
| tree | 10641a2258c2823ec7fe9cff1b0313fc1cb74373 /fs/io_uring.c | |
| parent | b9a6b8f92f6feebf40609e4f5f22a3c0404afb60 (diff) | |
io_uring: clusterise ki_flags access in rw_prep
ioprio setup doesn't depend on other fields that are modified in
io_prep_rw() and we can move it down in the function without worrying
about performance. It's useful as it makes iocb->ki_flags
accesses/modifications closer together, so it's more likely the compiler
will cache it in a register and avoid extra reloads.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/8ee98779c06f1b59f6039b1e292db4332efd664b.1634987320.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 7042ed870b52..bba2f77ae7e7 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -2840,16 +2840,6 @@ static int io_prep_rw(struct io_kiocb *req, const struct io_uring_sqe *sqe) ((file->f_flags & O_NONBLOCK) && !io_file_supports_nowait(req))) req->flags |= REQ_F_NOWAIT; - ioprio = READ_ONCE(sqe->ioprio); - if (ioprio) { - ret = ioprio_check_cap(ioprio); - if (ret) - return ret; - - kiocb->ki_ioprio = ioprio; - } else - kiocb->ki_ioprio = get_current_ioprio(); - if (ctx->flags & IORING_SETUP_IOPOLL) { if (!(kiocb->ki_flags & IOCB_DIRECT) || !file->f_op->iopoll) return -EOPNOTSUPP; @@ -2863,6 +2853,17 @@ static int io_prep_rw(struct io_kiocb *req, const struct io_uring_sqe *sqe) kiocb->ki_complete = io_complete_rw; } + ioprio = READ_ONCE(sqe->ioprio); + if (ioprio) { + ret = ioprio_check_cap(ioprio); + if (ret) + return ret; + + kiocb->ki_ioprio = ioprio; + } else { + kiocb->ki_ioprio = get_current_ioprio(); + } + req->imu = NULL; req->rw.addr = READ_ONCE(sqe->addr); req->rw.len = READ_ONCE(sqe->len); |