[Graph]: modify for the interface change of I/O scheduler.
[Graph]: modify for the interface change of I/O scheduler.

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