global_avail      408 mm/page-writeback.c 		unsigned long global_avail = gdtc->avail;
global_avail      418 mm/page-writeback.c 			ratio = min(DIV_ROUND_UP(bytes, global_avail),
global_avail      421 mm/page-writeback.c 			bg_ratio = min(DIV_ROUND_UP(bg_bytes, global_avail),