BLKIF_RING_SIZE
ring->ri_nentry = BLKIF_RING_SIZE;
vdp->xs_nentry = BLKIF_RING_SIZE;
if (xvdi_alloc_ring(dip, BLKIF_RING_SIZE,
#define XB_MAXPHYS (XB_MAX_XFER * BLKIF_RING_SIZE)
sizeof (*map->um_outstanding_reqs) * BLKIF_RING_SIZE);
xpvtap_rs_init(0, (BLKIF_RING_SIZE - 1), &map->um_rs);
sizeof (*map->um_outstanding_reqs) * BLKIF_RING_SIZE,
sizeof (*map->um_outstanding_reqs) * BLKIF_RING_SIZE);
(BLKIF_RING_SIZE * BLKIF_MAX_SEGMENTS_PER_REQUEST * PAGESIZE)