[tip: sched/core] sched/eevdf: Remove min_vruntime_copy

tip-bot2 for Peter Zijlstra
2024-08-18T06:23:15Z

The following commit has been merged into the sched/core branch of tip:

Commit-ID: 949090eaf0a3e39aa0f4a675407e16d0e975da11
Gitweb: https://git.kernel.org/tip/949090eaf0a3e39aa0f4a675407e16d0e975da11
Author: Peter Zijlstra <peterz@infradead.org>
AuthorDate: Wed, 04 Oct 2023 12:43:53 +02:00
Committer: Peter Zijlstra <peterz@infradead.org>
CommitterDate: Sat, 17 Aug 2024 11:06:40 +02:00

sched/eevdf: Remove min_vruntime_copy

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>
Reviewed-by: Valentin Schneider <vschneid@redhat.com>
Tested-by: Valentin Schneider <vschneid@redhat.com>
Link: https://lkml.kernel.org/r/20240727105028.395297941@infradead.org
---
kernel/sched/fair.c | 5 ++---
kernel/sched/sched.h | 4 ----
2 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 6d39a82..8201f0f 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -779,8 +779,7 @@ static void update_min_vruntime(struct cfs_rq *cfs_rq)
}

/* 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)
@@ -12933,7 +12932,7 @@ static void set_next_task_fair(struct rq *rq, struct task_struct *p, bool first)
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
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 1e1d1b4..a6d6b6f 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -613,10 +613,6 @@ struct cfs_rq {
u64 min_vruntime_fi;
#endif

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

/*