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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2021-10-16 20:32:29 -0500 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-10-19 05:49:56 -0600 |
| commit | b10841c98c8980ee50cc1e90640b04c935a24285 (patch) | |
| tree | 21c5dee4a3dee2cf92eab1ad648d29d06ab95a7c /fs/io_uring.c | |
| parent | 5cb03d63420bcf533111d30690141a5b28c172fa (diff) | |
| download | linux-b10841c98c8980ee50cc1e90640b04c935a24285.tar.bz2 | |
fs/io_uring: Prioritise checking faster conditions first in io_write
This commit reorders the conditions in a branch in io_write. The
reorder to check 'ret2 == -EAGAIN' first as checking
'(req->ctx->flags & IORING_SETUP_IOPOLL)' will likely be more
expensive due to 2x memory derefences.
Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com>
Link: https://lore.kernel.org/r/20211017013229.4124279-1-goldstein.w.n@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index d5d06e034959..11bd0dd1425a 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -3654,7 +3654,7 @@ static int io_write(struct io_kiocb *req, unsigned int issue_flags) goto done; if (!force_nonblock || ret2 != -EAGAIN) { /* IOPOLL retry should happen for io-wq threads */ - if ((req->ctx->flags & IORING_SETUP_IOPOLL) && ret2 == -EAGAIN) + if (ret2 == -EAGAIN && (req->ctx->flags & IORING_SETUP_IOPOLL)) goto copy_iov; done: kiocb_done(kiocb, ret2, issue_flags); |