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),