c->blockio_weight != (unsigned long) -1 ? c->blockio_weight : 1000);
r = cg_set_attribute("blkio", path, "blkio.weight", buf);
if (r < 0)
c->blockio_weight != (unsigned long) -1 ? c->blockio_weight : 1000);
r = cg_set_attribute("blkio", path, "blkio.weight", buf);
if (r < 0)