diff options
| author | Dylan Yudaken <dylany@meta.com> | 2023-01-27 05:52:26 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-01-29 15:18:26 -0700 |
| commit | c31cc60fddd11134031e7f9eb76812353cfaac84 (patch) | |
| tree | 8b8fcbce4f1b835340c20b6b56a15b9c0b8a27dc /io_uring/advise.c | |
| parent | aebb224fd4fc7352cd839ad90414c548387142fd (diff) | |
| download | lwn-c31cc60fddd11134031e7f9eb76812353cfaac84.tar.gz lwn-c31cc60fddd11134031e7f9eb76812353cfaac84.zip | |
io_uring: always go async for unsupported fadvise flags
No point in issuing -> return -EAGAIN -> go async, when it can be done upfront.
Signed-off-by: Dylan Yudaken <dylany@meta.com>
Link: https://lore.kernel.org/r/20230127135227.3646353-4-dylany@meta.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/advise.c')
| -rw-r--r-- | io_uring/advise.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/io_uring/advise.c b/io_uring/advise.c index cf600579bffe..7085804c513c 100644 --- a/io_uring/advise.c +++ b/io_uring/advise.c @@ -62,6 +62,18 @@ int io_madvise(struct io_kiocb *req, unsigned int issue_flags) #endif } +static bool io_fadvise_force_async(struct io_fadvise *fa) +{ + switch (fa->advice) { + case POSIX_FADV_NORMAL: + case POSIX_FADV_RANDOM: + case POSIX_FADV_SEQUENTIAL: + return false; + default: + return true; + } +} + int io_fadvise_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { struct io_fadvise *fa = io_kiocb_to_cmd(req, struct io_fadvise); @@ -72,6 +84,8 @@ int io_fadvise_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) fa->offset = READ_ONCE(sqe->off); fa->len = READ_ONCE(sqe->len); fa->advice = READ_ONCE(sqe->fadvise_advice); + if (io_fadvise_force_async(fa)) + req->flags |= REQ_F_FORCE_ASYNC; return 0; } @@ -80,16 +94,7 @@ int io_fadvise(struct io_kiocb *req, unsigned int issue_flags) struct io_fadvise *fa = io_kiocb_to_cmd(req, struct io_fadvise); int ret; - if (issue_flags & IO_URING_F_NONBLOCK) { - switch (fa->advice) { - case POSIX_FADV_NORMAL: - case POSIX_FADV_RANDOM: - case POSIX_FADV_SEQUENTIAL: - break; - default: - return -EAGAIN; - } - } + WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK && io_fadvise_force_async(fa)); ret = vfs_fadvise(req->file, fa->offset, fa->len, fa->advice); if (ret < 0) |