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

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This reverts commit 6f58caae21910a0700592a9acf12d7f6dda2e7bc.

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: Alexander Winkowski <dereference23@outlook.com>
Signed-off-by: Richard Raya <rdxzv.dev@gmail.com>
This commit is contained in:
Alexander Winkowski 2021-08-05 07:31:11 +02:00 committed by Richard Raya
parent d8423889bd
commit 77224feb50
2 changed files with 1 additions and 11 deletions
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6
kernel/sched/fair.c
View File

@ -4340,7 +4340,6 @@ 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
@ -4360,16 +4359,13 @@ 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;
}

6
kernel/sched/features.h
View File

@ -26,12 +26,6 @@ SCHED_FEAT(NEXT_BUDDY, true)
*/
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.