[RFC][PATCH 02/10] sched/eevdf: Remove min_vruntime_copy

Peter Zijlstra
2024-04-05T11:04:01Z

Since commit e8f331bcc270 ("sched/smp: Use lag to simplify
cross-runqueue placement") the min_vruntime_copy is no longer used.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
kernel/sched/fair.c | 5 ++---
kernel/sched/sched.h | 4 ----
2 files changed, 2 insertions(+), 7 deletions(-)

--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -780,8 +780,7 @@ static void update_min_vruntime(struct c
}

/* ensure we never gain time by being placed backwards. */
- u64_u32_store(cfs_rq->min_vruntime,
- __update_min_vruntime(cfs_rq, vruntime));
+ cfs_rq->min_vruntime = __update_min_vruntime(cfs_rq, vruntime);
}

static inline bool __entity_less(struct rb_node *a, const struct rb_node *b)
@@ -12876,7 +12875,7 @@ static void set_next_task_fair(struct rq
void init_cfs_rq(struct cfs_rq *cfs_rq)
{
cfs_rq->tasks_timeline = RB_ROOT_CACHED;
- u64_u32_store(cfs_rq->min_vruntime, (u64)(-(1LL << 20)));
+ cfs_rq->min_vruntime = (u64)(-(1LL << 20));
#ifdef CONFIG_SMP
raw_spin_lock_init(&cfs_rq->removed.lock);
#endif
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -599,10 +599,6 @@ struct cfs_rq {
u64 min_vruntime_fi;
#endif

-#ifndef CONFIG_64BIT
- u64 min_vruntime_copy;
-#endif
-
struct rb_root_cached tasks_timeline;

/*