9 #include "ordered-data.h"
115  *     running delalloc, but usually we need to wait for ordered extents to
525 	 * If we are doing more ordered than delalloc we need to just wait on  in shrink_delalloc()
526 	 * ordered extents, otherwise we'll waste time trying to flush delalloc  in shrink_delalloc()
548 		 * their jobs and thus have ordered extents set up properly.  in shrink_delalloc()
554 		 * that we know we'll have ordered extents for everything and we  in shrink_delalloc()
736 	u64 ordered, delalloc;  in need_preemptive_reclaim()  local
806 	 * If we have more ordered bytes than delalloc bytes then we're either  in need_preemptive_reclaim()
810 	 * of ordered extents, preemptively waiting on ordered extents gets us  in need_preemptive_reclaim()
811 	 * nothing, if our reservations are tied up in ordered extents we'll  in need_preemptive_reclaim()
812 	 * simply have to slow down writers by forcing them to wait on ordered  in need_preemptive_reclaim()
815 	 * In the case that ordered is larger than delalloc, only include the  in need_preemptive_reclaim()
819 	 * of heavy DIO or ordered reservations, preemptive flushing will just  in need_preemptive_reclaim()
822 	 * We want to make sure we truly are maxed out on ordered however, so  in need_preemptive_reclaim()
823 	 * cut ordered in half, and if it's still higher than delalloc then we  in need_preemptive_reclaim()
825 	 * flushing, and now delalloc == ordered and we stop preemptively  in need_preemptive_reclaim()
828 	ordered = percpu_counter_read_positive(&fs_info->ordered_bytes) >> 1;  in need_preemptive_reclaim()
830 	if (ordered >= delalloc)  in need_preemptive_reclaim()
1120  *   For #2 this is trickier.  Once the ordered extent runs we will drop the
1406 	u64 ordered = percpu_counter_sum_positive(&fs_info->ordered_bytes);  in maybe_clamp_preempt()  local
1410 	 * If we're heavy on ordered operations then clamping won't help us.  We  in maybe_clamp_preempt()
1414 	 * delayed nodes.  If we're already more ordered than delalloc then  in maybe_clamp_preempt()
1417 	if (ordered < delalloc)  in maybe_clamp_preempt()