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(parent: 6eaee85) | patch
io_uring: don't wait when under-submitting
authorPavel Begunkov <asml.silence@gmail.com>
Wed, 18 Dec 2019 16:53:45 +0000 (19:53 +0300)
committerJens Axboe <axboe@kernel.dk>
Wed, 18 Dec 2019 17:01:49 +0000 (10:01 -0700)
commit0c8912cc38edbe23c3ebecdbd59fcbffa43512a1
tree7badbc25ff49df5c2493cd5516b9dcbdfa8d7b50tree | snapshot
parent6eaee857069d111c13628996f1f6c7052cea97a2commit | diff
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>
fs/io_uring.c diff | blob | history
Linux Kernel Source Tree.