qemu-nbd: document --cache and --aio options

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

diff --git a/qemu-nbd.texi b/qemu-nbd.texi
index 6955d903271de24a2c52b544cacdb67183115aeb..3e57200e76f9f14da8b9f304f7929c57930ba85f 100644 (file)
--- a/qemu-nbd.texi
+++ b/qemu-nbd.texi
@@ -29,7 +29,12 @@ Export QEMU disk image using NBD protocol.
 @item -s, --snapshot
   use snapshot file
 @item -n, --nocache
-  disable host cache
+@itemx --cache=@var{cache}
+  set cache mode to be used with the file.  See the documentation of
+  the emulator's @code{-drive cache=...} option for allowed values.
+@item --aio=@var{aio}
+  choose asynchronous I/O mode between @samp{threads} (the default)
+  and @samp{native} (Linux only).
 @item -c, --connect=@var{dev}
   connect @var{filename} to NBD device @var{dev}
 @item -d, --disconnect