man/io_uring_enter.2: clarify -EMFILE per-user case
@@ -186,13 +186,13 @@ exceeds the maximum allowed number of files in a fixed file set.
.BR IORING_REGISTER_FILES
was specified and adding
.I nr_args
-file references would exceed the maximum allowed number of files the process
+file references would exceed the maximum allowed number of files the user
is allowed to have according to the
.B
RLIMIT_NOFILE
resource limit and the caller does not have
.B CAP_SYS_RESOURCE
-capability.
+capability. Note that this is a per user limit, not per process.
.TP
.B ENOMEM
Insufficient kernel resources are available, or the caller had a
