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| author | Jens Axboe <axboe@kernel.dk> | 2022-05-10 14:38:19 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-05-10 14:39:29 -0600 |
| commit | e597622672fcfdab486337b5a80be49cfe25a99c (patch) | |
| tree | b98fbe0a05ee112cbc711262cee29daa9a08f7bf | |
| parent | 95bcdd2f4bdd0dc702d9eb77675a31c0f0935dc6 (diff) | |
| download | liburing-e597622672fcfdab486337b5a80be49cfe25a99c.tar.gz liburing-e597622672fcfdab486337b5a80be49cfe25a99c.tar.bz2 | |
man: update man pages for waiting on a CQE with a timeout
On older kernels, it was indeed true that you did not need to separately
submit before doing a wait, IFF you used a timeout. However, this is
not true since kernels supported IORING_ENTER_EXT_ARG.
Link: https://github.com/axboe/liburing/issues/579
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | man/io_uring_wait_cqe_timeout.3 | 10 | ||||
| -rw-r--r-- | man/io_uring_wait_cqes.3 | 10 |
2 files changed, 16 insertions, 4 deletions
diff --git a/man/io_uring_wait_cqe_timeout.3 b/man/io_uring_wait_cqe_timeout.3 index 64e920b..e81018a 100644 --- a/man/io_uring_wait_cqe_timeout.3 +++ b/man/io_uring_wait_cqe_timeout.3 @@ -28,8 +28,14 @@ param is filled in on success. If .I ts -is specified, the application does not need to call io_uring_submit (3) before -calling io_uring_wait_cqes (3). +is specified and an older kernel without +.B IORING_FEAT_EXT_ARG +is used, the application does not need to call +.BR io_uring_submit (3) +before calling +.BR io_uring_wait_cqes (3). +For newer kernels with that feature flag set, there is no implied submit +when waiting for a request. .SH RETURN VALUE On success diff --git a/man/io_uring_wait_cqes.3 b/man/io_uring_wait_cqes.3 index a9a4a0c..2fb727c 100644 --- a/man/io_uring_wait_cqes.3 +++ b/man/io_uring_wait_cqes.3 @@ -35,8 +35,14 @@ param is filled in on success. If .I ts -is specified, the application does not need to call io_uring_submit (3) before -calling io_uring_wait_cqes (3). +is specified and an older kernel without +.B IORING_FEAT_EXT_ARG +is used, the application does not need to call +.BR io_uring_submit (3) +before calling +.BR io_uring_wait_cqes (3). +For newer kernels with that feature flag set, there is no implied submit +when waiting for a request. .SH RETURN VALUE On success |