507 static unsigned long dirty_freerun_ceiling(unsigned long thresh,  in dirty_freerun_ceiling()  argument
510 	return (thresh + bg_thresh) / 2;  in dirty_freerun_ceiling()
513 static unsigned long hard_dirty_limit(unsigned long thresh)  in hard_dirty_limit()  argument
515 	return max(thresh, global_dirty_limit);  in hard_dirty_limit()
668 					unsigned long thresh,  in bdi_position_ratio()  argument
675 	unsigned long freerun = dirty_freerun_ceiling(thresh, bg_thresh);  in bdi_position_ratio()
676 	unsigned long limit = hard_dirty_limit(thresh);  in bdi_position_ratio()
731 		bdi_bg_thresh = div_u64((u64)bdi_thresh * bg_thresh, thresh);  in bdi_position_ratio()
796 	if (unlikely(bdi_thresh > thresh))  in bdi_position_ratio()
797 		bdi_thresh = thresh;  in bdi_position_ratio()
810 	x = div_u64((u64)bdi_thresh << 16, thresh | 1);  in bdi_position_ratio()
820 	span = (thresh - bdi_thresh + 8 * write_bw) * (u64)x >> 16;  in bdi_position_ratio()
896 static void update_dirty_limit(unsigned long thresh, unsigned long dirty)  in update_dirty_limit()  argument
903 	if (limit < thresh) {  in update_dirty_limit()
904 		limit = thresh;  in update_dirty_limit()
913 	thresh = max(thresh, dirty);  in update_dirty_limit()
914 	if (limit > thresh) {  in update_dirty_limit()
915 		limit -= (limit - thresh) >> 5;  in update_dirty_limit()
923 static void global_update_bandwidth(unsigned long thresh,  in global_update_bandwidth()  argument
938 		update_dirty_limit(thresh, dirty);  in global_update_bandwidth()
951 				       unsigned long thresh,  in bdi_update_dirty_ratelimit()  argument
959 	unsigned long freerun = dirty_freerun_ceiling(thresh, bg_thresh);  in bdi_update_dirty_ratelimit()
960 	unsigned long limit = hard_dirty_limit(thresh);  in bdi_update_dirty_ratelimit()
977 	pos_ratio = bdi_position_ratio(bdi, thresh, bg_thresh, dirty,  in bdi_update_dirty_ratelimit()
1115 			    unsigned long thresh,  in __bdi_update_bandwidth()  argument
1143 	if (thresh) {  in __bdi_update_bandwidth()
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()
1158 				 unsigned long thresh,  in bdi_update_bandwidth()  argument
1168 	__bdi_update_bandwidth(bdi, thresh, bg_thresh, dirty,  in bdi_update_bandwidth()
1182 					 unsigned long thresh)  in dirty_poll_interval()  argument
1184 	if (thresh > dirty)  in dirty_poll_interval()
1185 		return 1UL << (ilog2(thresh - dirty) >> 1);  in dirty_poll_interval()
1364 		unsigned long thresh;  in balance_dirty_pages()  local
1386 			thresh = bdi_thresh;  in balance_dirty_pages()
1389 			thresh = dirty_thresh;  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()