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| author | Pavel Begunkov <asml.silence@gmail.com> | 2020-05-01 17:09:38 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-05-01 08:50:57 -0600 |
| commit | 2fb3e82284fca40afbde5351907f0a5b3be717f9 (patch) | |
| tree | f373b9b6706caa213245c7131d286f34e6000361 | |
| parent | 4ee3631451c9a62e6b6bc7ee51fb9a5b34e33509 (diff) | |
| download | lwn-2fb3e82284fca40afbde5351907f0a5b3be717f9.tar.gz lwn-2fb3e82284fca40afbde5351907f0a5b3be717f9.zip | |
io_uring: punt splice async because of inode mutex
Nonblocking do_splice() still may wait for some time on an inode mutex.
Let's play safe and always punt it async.
Reported-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | fs/io_uring.c | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 91ddc27b5173..0b91b0631173 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -2768,15 +2768,6 @@ static int io_splice_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) return 0; } -static bool io_splice_punt(struct file *file, int rw) -{ - if (get_pipe_info(file)) - return false; - if (!io_file_supports_async(file, rw)) - return true; - return !(file->f_flags & O_NONBLOCK); -} - static int io_splice(struct io_kiocb *req, bool force_nonblock) { struct io_splice *sp = &req->splice; @@ -2786,11 +2777,8 @@ static int io_splice(struct io_kiocb *req, bool force_nonblock) loff_t *poff_in, *poff_out; long ret; - if (force_nonblock) { - if (io_splice_punt(in, READ) || io_splice_punt(out, WRITE)) - return -EAGAIN; - flags |= SPLICE_F_NONBLOCK; - } + if (force_nonblock) + return -EAGAIN; poff_in = (sp->off_in == -1) ? NULL : &sp->off_in; poff_out = (sp->off_out == -1) ? NULL : &sp->off_out; |