| commit | 7c504e65206a4379ff38fe41d21b32b6c2c3e53e | |
| author | Pavel Begunkov <asml.silence@gmail.com> | |
| Wed, 18 Dec 2019 16:53:45 +0000 (18 19:53 +0300) | ||
| committer | Jens Axboe <axboe@kernel.dk> | |
| Wed, 18 Dec 2019 17:01:49 +0000 (18 10:01 -0700) | ||
| tree | 7badbc25ff49df5c2493cd5516b9dcbdfa8d7b50 | treesnapshot (tar.gz zip) |
| parent | e781573e2fb1b75acdba61dcb9bcbfc16f288442 | commitdiff |
io_uring: don't wait when under-submitting
There is no reliable way to submit and wait in a single syscall, as
io_submit_sqes() may under-consume sqes (in case of an early error).
Then it will wait for not-yet-submitted requests, deadlocking the user
in most cases.
Don't wait/poll if can't submit all sqes
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
There is no reliable way to submit and wait in a single syscall, as
io_submit_sqes() may under-consume sqes (in case of an early error).
Then it will wait for not-yet-submitted requests, deadlocking the user
in most cases.
Don't wait/poll if can't submit all sqes
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| fs/io_uring.c | diffblobblamehistory |