9 #include "ordered-data.h"
119  *     running delalloc, but usually we need to wait for ordered extents to
636 	 * If we are doing more ordered than delalloc we need to just wait on  in shrink_delalloc()
637 	 * ordered extents, otherwise we'll waste time trying to flush delalloc  in shrink_delalloc()
659 		 * their jobs and thus have ordered extents set up properly.  in shrink_delalloc()
665 		 * that we know we'll have ordered extents for everything and we  in shrink_delalloc()
860 	u64 ordered, delalloc;  in need_preemptive_reclaim()  local
934 	 * If we have more ordered bytes than delalloc bytes then we're either  in need_preemptive_reclaim()
938 	 * of ordered extents, preemptively waiting on ordered extents gets us  in need_preemptive_reclaim()
939 	 * nothing, if our reservations are tied up in ordered extents we'll  in need_preemptive_reclaim()
940 	 * simply have to slow down writers by forcing them to wait on ordered  in need_preemptive_reclaim()
943 	 * In the case that ordered is larger than delalloc, only include the  in need_preemptive_reclaim()
947 	 * of heavy DIO or ordered reservations, preemptive flushing will just  in need_preemptive_reclaim()
950 	 * We want to make sure we truly are maxed out on ordered however, so  in need_preemptive_reclaim()
951 	 * cut ordered in half, and if it's still higher than delalloc then we  in need_preemptive_reclaim()
953 	 * flushing, and now delalloc == ordered and we stop preemptively  in need_preemptive_reclaim()
956 	ordered = percpu_counter_read_positive(&fs_info->ordered_bytes) >> 1;  in need_preemptive_reclaim()
958 	if (ordered >= delalloc)  in need_preemptive_reclaim()
1257  *   For #2 this is trickier.  Once the ordered extent runs we will drop the
1581 	u64 ordered = percpu_counter_sum_positive(&fs_info->ordered_bytes);  in maybe_clamp_preempt()  local
1585 	 * If we're heavy on ordered operations then clamping won't help us.  We  in maybe_clamp_preempt()
1589 	 * delayed nodes.  If we're already more ordered than delalloc then  in maybe_clamp_preempt()
1592 	if (ordered < delalloc)  in maybe_clamp_preempt()