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-rw-r--r--lib/libc/sys/aio_error.220
1 files changed, 20 insertions, 0 deletions
diff --git a/lib/libc/sys/aio_error.2 b/lib/libc/sys/aio_error.2
index 4347758..3881a2a 100644
--- a/lib/libc/sys/aio_error.2
+++ b/lib/libc/sys/aio_error.2
@@ -70,6 +70,23 @@ function will fail if:
.Fa iocb
does not reference an outstanding asynchronous I/O request.
.El
+.Sh KERNEL OPTIONS
+The following kernel configuration option
+(see
+.Xr config 8 )
+is required:
+.Pp
+.Dl "options VFS_AIO"
+.Pp
+If you do not want AIO support included in the kernel, but
+want to use it occasionally, do not add the
+.Dv VFS_AIO
+option. Instead, load the
+.Nm aio
+module as desired:
+.Pp
+.Dl kldload aio
+.Pp
.Sh SEE ALSO
.Xr aio_cancel 2 ,
.Xr aio_read 2 ,
@@ -79,6 +96,9 @@ does not reference an outstanding asynchronous I/O request.
.Xr fsync 2 ,
.Xr read 2 ,
.Xr write 2
+.Xr config 8 ,
+.Xr kldload 8 ,
+.Xr kldunload 8
.Sh STANDARDS
.Fn aio_error
is expected to conform to the
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