[SAFS]: add comments to remote_io.
[SAFS]: add comments to remote_io.

icoming/FlashGraph,zheng-da/FlashX,icoming/FlashGraph,flashxio/FlashX,icoming/FlashGraph,icoming/FlashX,icoming/FlashGraph,flashxio/FlashX,flashxio/FlashX,icoming/FlashX,icoming/FlashX,flashxio/FlashX,flashxio/FlashX,zheng-da/FlashX,flashxio/FlashX,icoming/FlashX,icoming/FlashX,zheng-da/FlashX,zheng-da/FlashX,icoming/FlashGraph,zheng-da/FlashX