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Commit 1134e5c1 authored by Alexander Winkowski's avatar Alexander Winkowski Committed by DarkJoker360
Browse files

Revert "sched: fair: Add strict skip buddy support" 



This reverts commit 6f58caae.

It's not present in newer CAF kernels and Google removed it on their
4.14 devices as well.

Change-Id: I3675cbfe4a37ae9ed31bf3659a545965a0d59c6f
Signed-off-by: default avatarAlexander Winkowski <dereference23@outlook.com>
parent 44547dfc

kernel/sched/fair.c

+1 −5
Original line number Diff line number Diff line
@@ -4254,7 +4254,6 @@ pick_next_entity(struct cfs_rq *cfs_rq, struct sched_entity *curr) 
{

	struct sched_entity *left = __pick_first_entity(cfs_rq);

	struct sched_entity *se;

	bool strict_skip = false;



	/*

	 * If curr is set we have to see if its left of the leftmost entity
@@ -4274,16 +4273,13 @@ pick_next_entity(struct cfs_rq *cfs_rq, struct sched_entity *curr) 


		if (se == curr) {

			second = __pick_first_entity(cfs_rq);

			if (sched_feat(STRICT_SKIP_BUDDY))

				strict_skip = true;

		} else {

			second = __pick_next_entity(se);

			if (!second || (curr && entity_before(curr, second)))

				second = curr;

		}



		if (second && (strict_skip ||

		    wakeup_preempt_entity(second, left) < 1))

		if (second && wakeup_preempt_entity(second, left) < 1)

			se = second;

	}

kernel/sched/features.h

+0 −6
Original line number Diff line number Diff line
@@ -26,12 +26,6 @@ SCHED_FEAT(NEXT_BUDDY, false) 
 */

SCHED_FEAT(LAST_BUDDY, true)



/*

 * skip buddy i.e task called yield() is always skipped and the

 * next entity is selected to run irrespective of the vruntime

 */

SCHED_FEAT(STRICT_SKIP_BUDDY, true)



/*

 * Consider buddies to be cache hot, decreases the likelyness of a

 * cache buddy being migrated away, increases cache locality.