sched/fair: remove the DOUBLE_TICK feature

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

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 225b31aaee558a5bd6cfbc85eac9647d84c1a762..c9e3b8d2a85fecd59ab7fc7ef31d670cd4eedf5b 100644 (file)
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -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
 }
 

diff --git a/kernel/sched/features.h b/kernel/sched/features.h
index 290874079f60d9709202c120576930854215bd54..7c22b33fb9d3003ca33c2df8a823ad725c6a17e1 100644 (file)
--- a/kernel/sched/features.h
+++ b/kernel/sched/features.h
@@ -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