sched/debug: Remove the /proc/sys/kernel/sched_child_runs_first sysctl

The /proc/sys/kernel/sched_child_runs_first knob is no longer connected since:

   5e963f2bd4654 ("sched/fair: Commit to EEVDF")

Remove it.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230920130025.412071-2-bigeasy@linutronix.de

diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 4c3d0d9f3db6326703f92aab707771c39921a543..132dfd1e6f475cb32ff83e22f7101fd7bd95273d 100644 (file)
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -864,7 +864,6 @@ static void sched_debug_header(struct seq_file *m)
 #define PN(x) \
        SEQ_printf(m, "  .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
        PN(sysctl_sched_base_slice);
-       P(sysctl_sched_child_runs_first);
        P(sysctl_sched_features);
 #undef PN
 #undef P

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index fcf0c5bc8b478d6cba5703323118ac03a7efe6b2..75720008fdd21196d37d21d3cbfbac100af536da 100644 (file)
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -78,12 +78,6 @@ unsigned int sysctl_sched_tunable_scaling = SCHED_TUNABLESCALING_LOG;
 unsigned int sysctl_sched_base_slice                   = 750000ULL;
 static unsigned int normalized_sysctl_sched_base_slice = 750000ULL;
 
-/*
- * After fork, child runs first. If set to 0 (default) then
- * parent will (try to) run first.
- */
-unsigned int sysctl_sched_child_runs_first __read_mostly;
-
 const_debug unsigned int sysctl_sched_migration_cost   = 500000UL;
 
 int sched_thermal_decay_shift;
@@ -145,13 +139,6 @@ static unsigned int sysctl_numa_balancing_promote_rate_limit = 65536;
 
 #ifdef CONFIG_SYSCTL
 static struct ctl_table sched_fair_sysctls[] = {
-       {
-               .procname       = "sched_child_runs_first",
-               .data           = &sysctl_sched_child_runs_first,
-               .maxlen         = sizeof(unsigned int),
-               .mode           = 0644,
-               .proc_handler   = proc_dointvec,
-       },
 #ifdef CONFIG_CFS_BANDWIDTH
        {
                .procname       = "sched_cfs_bandwidth_slice_us",

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 7e070dcf707470d0d732429e947a2398e9c5ddcf..9260120ed2a5caeefbcf487a1ef7fe51d45c296c 100644 (file)
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -100,8 +100,6 @@ extern __read_mostly int scheduler_running;
 extern unsigned long calc_load_update;
 extern atomic_long_t calc_load_tasks;
 
-extern unsigned int sysctl_sched_child_runs_first;
-
 extern void calc_global_load_tick(struct rq *this_rq);
 extern long calc_load_fold_active(struct rq *this_rq, long adjust);