man/io_uring_setup.2: Improve IORING_SETUP_REGISTERED_FD_ONLY documen…

…tation Document that IORING_SETUP_REGISTERED_FD_ONLY depends on IORING_SETUP_NO_MMAP being set. Closes: #1087 Signed-off-by: Gabriel Krisman Bertazi <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jens Axboe <[email protected]>
axboe · Apr 6, 2024 · e4cfc72 · e4cfc72
1 parent 501c78d
commit e4cfc72
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/man/io_uring_setup.2 b/man/io_uring_setup.2
@@ -325,6 +325,9 @@ file descriptor. The caller will need to use
 .B IORING_REGISTER_USE_REGISTERED_RING
 when calling
 .BR io_uring_register (2).
+This flag only makes sense when used alongside with
+.B IORING_SETUP_NO_MMAP,
+which also needs to be set.
 Available since 6.5.
 
 .TP
@@ -690,6 +693,10 @@ was not, or
 was specified, but
 .I io_uring_params.cq_entries
 was invalid.
+.B IORING_SETUP_REGISTERED_FD_ONLY
+was specified, but
+.B IORING_SETUP_NO_MMAP
+was not.
 .TP
 .B EMFILE
 The per-process limit on the number of open file descriptors has been