THROTL_TG_CANCELING
if (tg->flags & THROTL_TG_CANCELING)
tg->flags |= THROTL_TG_CANCELING;
if (bps_limit == U64_MAX || tg->flags & THROTL_TG_CANCELING ||
if (iops_limit == UINT_MAX || tg->flags & THROTL_TG_CANCELING)