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sched/fair: remove the DOUBLE_TICK feature

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The patch "5e963f2bd46 sched/fair: Commit to EEVDF"
removed the code following the DOUBLE_TICK:
	-
	-       if (!sched_feat(EEVDF) && cfs_rq->nr_running > 1)
	-               check_preempt_tick(cfs_rq, curr);

The DOUBLE_TICK feature becomes dead code now, so remove it.

Signed-off-by: Huang Shijie <shijie@os.amperecomputing.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: "Christoph Lameter (Ampere)" <cl@linux.com>
Reviewed-by: Vishal Chourasia <vishalc@linux.ibm.com>
Link: https://lore.kernel.org/r/20241001065451.10356-1-shijie@os.amperecomputing.com
This commit is contained in:
Huang Shijie
2024-10-01 14:54:51 +08:00
committed by Peter Zijlstra
parent 5e9f0c4819
commit e31488c9df
2 changed files with 0 additions and 7 deletions
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6
kernel/sched/fair.c
View File

@@ -5680,12 +5680,6 @@ entity_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr, int queued)
resched_curr(rq_of(cfs_rq));
return;
}
/*
* don't let the period tick interfere with the hrtick preemption
*/
if (!sched_feat(DOUBLE_TICK) &&
hrtimer_active(&rq_of(cfs_rq)->hrtick_timer))
return;
#endif
}

1
kernel/sched/features.h
View File

@@ -56,7 +56,6 @@ SCHED_FEAT(WAKEUP_PREEMPTION, true)
SCHED_FEAT(HRTICK, false)
SCHED_FEAT(HRTICK_DL, false)
SCHED_FEAT(DOUBLE_TICK, false)
/*
* Decrement CPU capacity based on time not spent running tasks