diff mbox series

[liburing,1/3] io_uring_enter.2: add sendzc -EOPNOTSUPP note

Message ID dfe582705c8c3458f14c6d7f0db9a8bbd371f749.1666357688.git.asml.silence@gmail.com (mailing list archive)
State New
Headers show
Series improve sendzc man pages | expand

Commit Message

Pavel Begunkov Oct. 21, 2022, 1:10 p.m. UTC 
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 man/io_uring_enter.2 | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/man/io_uring_enter.2 b/man/io_uring_enter.2
index 2ebc6e3..25fdc1e 100644
--- a/man/io_uring_enter.2
+++ b/man/io_uring_enter.2
@@ -1098,8 +1098,11 @@  Available since 5.19.
 Issue the zerocopy equivalent of a
 .BR send(2)
 system call. Similar to IORING_OP_SEND, but tries to avoid making intermediate
-copies of data. Zerocopy execution is not guaranteed and it may fall back to
-copying.
+copies of data. Zerocopy execution is not guaranteed and may fall back to
+copying. The request may also fail with
+.B -EOPNOTSUPP,
+for instance when a protocol doesn't support zerocopy in the first place, in
+which case users are recommended to use copying sends instead.
 
 The
 .I flags