449 	unsigned long dirty;  in node_dirty_limit()  local
452 		dirty = DIV_ROUND_UP(vm_dirty_bytes, PAGE_SIZE) *  in node_dirty_limit()
455 		dirty = vm_dirty_ratio * node_memory / 100;  in node_dirty_limit()
458 		dirty += dirty / 4;  in node_dirty_limit()
464 	return min_t(unsigned long, dirty, UINT_MAX);  in node_dirty_limit()
840 	unsigned long clean = filepages - min(filepages, mdtc->dirty);  in mdtc_calc_avail()
841 	unsigned long global_clean = gdtc->avail - min(gdtc->avail, gdtc->dirty);  in mdtc_calc_avail()
861 		dtc->dirty = global_node_page_state(NR_FILE_DIRTY);  in domain_dirty_avail()
863 			dtc->dirty += global_node_page_state(NR_WRITEBACK);  in domain_dirty_avail()
867 		mem_cgroup_wb_stats(dtc->wb, &filepages, &headroom, &dtc->dirty,  in domain_dirty_avail()
870 			dtc->dirty += writeback;  in domain_dirty_avail()
930 	if (thresh > dtc->dirty) {  in __wb_calc_thresh()
932 			wb_thresh = max(wb_thresh, (thresh - dtc->dirty) / 100);  in __wb_calc_thresh()
934 			wb_thresh = max(wb_thresh, (thresh - dtc->dirty) / 8);  in __wb_calc_thresh()
979 					  unsigned long dirty,  in pos_ratio_polynom()  argument
985 	x = div64_s64(((s64)setpoint - (s64)dirty) << RATELIMIT_CALC_SHIFT,  in pos_ratio_polynom()
1086 	if (unlikely(dtc->dirty >= limit))  in wb_position_ratio()
1095 	pos_ratio = pos_ratio_polynom(setpoint, dtc->dirty, limit);  in wb_position_ratio()
1304 	thresh = max(thresh, dtc->dirty);  in update_dirty_limit()
1344 	unsigned long dirty = dtc->dirty;  in wb_update_dirty_ratelimit()  local
1452 		dirty = dtc->wb_dirty;  in wb_update_dirty_ratelimit()
1456 	if (dirty < setpoint) {  in wb_update_dirty_ratelimit()
1566 static unsigned long dirty_poll_interval(unsigned long dirty,  in dirty_poll_interval()  argument
1569 	if (thresh > dirty)  in dirty_poll_interval()
1570 		return 1UL << (ilog2(thresh - dirty) >> 1);  in dirty_poll_interval()
1713 	unsigned long dirty, thresh;  in domain_poll_intv()  local
1716 		dirty = dtc->wb_dirty;  in domain_poll_intv()
1719 		dirty = dtc->dirty;  in domain_poll_intv()
1723 	return dirty_poll_interval(dirty, thresh);  in domain_poll_intv()
1738 	unsigned long dirty, thresh, bg_thresh;  in domain_dirty_freerun()  local
1742 		dirty = dtc->wb_dirty;  in domain_dirty_freerun()
1746 		dirty = dtc->dirty;  in domain_dirty_freerun()
1750 	dtc->freerun = dirty <= dirty_freerun_ceiling(thresh, bg_thresh);  in domain_dirty_freerun()
1786 		((dtc->dirty > dtc->thresh) || strictlimit);  in wb_dirty_exceeded()
2142 	if (dtc->dirty > dtc->bg_thresh)  in domain_over_bg_thresh()