266 	unsigned long dirty;  in global_dirty_limits()  local
270 		dirty = DIV_ROUND_UP(vm_dirty_bytes, PAGE_SIZE);  in global_dirty_limits()
272 		dirty = (vm_dirty_ratio * available_memory) / 100;  in global_dirty_limits()
279 	if (background >= dirty)  in global_dirty_limits()
280 		background = dirty / 2;  in global_dirty_limits()
284 		dirty += dirty / 4;  in global_dirty_limits()
287 	*pdirty = dirty;  in global_dirty_limits()
288 	trace_global_dirty_state(background, dirty);  in global_dirty_limits()
302 	unsigned long dirty;  in zone_dirty_limit()  local
305 		dirty = DIV_ROUND_UP(vm_dirty_bytes, PAGE_SIZE) *  in zone_dirty_limit()
308 		dirty = vm_dirty_ratio * zone_memory / 100;  in zone_dirty_limit()
311 		dirty += dirty / 4;  in zone_dirty_limit()
313 	return dirty;  in zone_dirty_limit()
540 unsigned long bdi_dirty_limit(struct backing_dev_info *bdi, unsigned long dirty)  in bdi_dirty_limit()  argument
550 	bdi_dirty = (dirty * (100 - bdi_min_ratio)) / 100;  in bdi_dirty_limit()
554 	bdi_dirty += (dirty * bdi->min_ratio) / 100;  in bdi_dirty_limit()
555 	if (bdi_dirty > (dirty * bdi->max_ratio) / 100)  in bdi_dirty_limit()
556 		bdi_dirty = dirty * bdi->max_ratio / 100;  in bdi_dirty_limit()
576 					  unsigned long dirty,  in pos_ratio_polynom()  argument
582 	x = div64_s64(((s64)setpoint - (s64)dirty) << RATELIMIT_CALC_SHIFT,  in pos_ratio_polynom()
670 					unsigned long dirty,  in bdi_position_ratio()  argument
684 	if (unlikely(dirty >= limit))  in bdi_position_ratio()
693 	pos_ratio = pos_ratio_polynom(setpoint, dirty, limit);  in bdi_position_ratio()
805 	bdi_thresh = max(bdi_thresh, (limit - dirty) / 8);  in bdi_position_ratio()
896 static void update_dirty_limit(unsigned long thresh, unsigned long dirty)  in update_dirty_limit()  argument
913 	thresh = max(thresh, dirty);  in update_dirty_limit()
924 				    unsigned long dirty,  in global_update_bandwidth()  argument
938 		update_dirty_limit(thresh, dirty);  in global_update_bandwidth()
953 				       unsigned long dirty,  in bdi_update_dirty_ratelimit()  argument
977 	pos_ratio = bdi_position_ratio(bdi, thresh, bg_thresh, dirty,  in bdi_update_dirty_ratelimit()
1072 		dirty = bdi_dirty;  in bdi_update_dirty_ratelimit()
1080 	if (dirty < setpoint) {  in bdi_update_dirty_ratelimit()
1117 			    unsigned long dirty,  in __bdi_update_bandwidth()  argument
1144 		global_update_bandwidth(thresh, dirty, now);  in __bdi_update_bandwidth()
1145 		bdi_update_dirty_ratelimit(bdi, thresh, bg_thresh, dirty,  in __bdi_update_bandwidth()
1160 				 unsigned long dirty,  in bdi_update_bandwidth()  argument
1168 	__bdi_update_bandwidth(bdi, thresh, bg_thresh, dirty,  in bdi_update_bandwidth()
1181 static unsigned long dirty_poll_interval(unsigned long dirty,  in dirty_poll_interval()  argument
1184 	if (thresh > dirty)  in dirty_poll_interval()
1185 		return 1UL << (ilog2(thresh - dirty) >> 1);  in dirty_poll_interval()
1366 		unsigned long dirty;  in balance_dirty_pages()  local
1385 			dirty = bdi_dirty;  in balance_dirty_pages()
1388 			dirty = nr_dirty;  in balance_dirty_pages()
1402 		if (dirty <= dirty_freerun_ceiling(thresh, bg_thresh)) {  in balance_dirty_pages()
1406 				dirty_poll_interval(dirty, thresh);  in balance_dirty_pages()