linux-master/mm/page-writeback.c

1572 			 int *nr_dirtied_pause)
1578 	int pages;	/* target nr_dirtied_pause */
1593 	 * This is a bit convoluted. We try to base the next nr_dirtied_pause
1604 	 *    nr_dirtied_pause so as not to exceed max_pause. When this happens,
1605 	 *    nr_dirtied_pause will be "dancing" with task_ratelimit.
1608 	 *    nr_dirtied_pause will remain as stable as dirty_ratelimit.
1614 	 * Tiny nr_dirtied_pause is found to hurt I/O performance in the test
1618 	 * (deadline is fine). So push nr_dirtied_pause as high as possible
1636 	*nr_dirtied_pause = pages;
1705 	int nr_dirtied_pause;
1804 			current->nr_dirtied_pause = min(intv, m_intv);
1881 					 &nr_dirtied_pause);
1918 			} else if (current->nr_dirtied_pause <= pages_dirtied)
1919 				current->nr_dirtied_pause += pages_dirtied;
1951 		current->nr_dirtied_pause = nr_dirtied_pause;
1984  *		dirty tsk->nr_dirtied_pause pages;
1988  * (tsk->nr_dirtied_pause - 1) pages, balance_dirty_pages() will never be
2032 	ratelimit = current->nr_dirtied_pause;
2041 	 * time, hence all honoured too large initial task->nr_dirtied_pause.