[PATCH] sched/fair: Kill the unused sched_shares_window_ns tunable

[Matt Fleming]

The last user of this tunable was removed in 2012 in commit 8295836
("sched: Replace update_shares weight distribution with per-entity
computation").

Delete it since its very existence confuses people.

Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Dietmar Eggemann <dietmar.eggem...@arm.com>
Cc: Paul Turner <p...@google.com>
Cc: Mike Galbraith <umgwanakikb...@gmail.com>
Signed-off-by: Matt Fleming <m...@codeblueprint.co.uk>
---
 include/linux/sched/sysctl.h | 1 -
 kernel/sched/fair.c          | 7 -------
 kernel/sysctl.c              | 7 -------
 3 files changed, 15 deletions(-)

diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h
index 22db1e63707e..441145351301 100644
--- a/include/linux/sched/sysctl.h
+++ b/include/linux/sched/sysctl.h
@@ -36,7 +36,6 @@ extern unsigned int sysctl_numa_balancing_scan_size;
 extern unsigned int sysctl_sched_migration_cost;
 extern unsigned int sysctl_sched_nr_migrate;
 extern unsigned int sysctl_sched_time_avg;
-extern unsigned int sysctl_sched_shares_window;
 
 int sched_proc_update_handler(struct ctl_table *table, int write,
                void __user *buffer, size_t *length,
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 543b2f291152..f026050c15cc 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -93,13 +93,6 @@ unsigned int normalized_sysctl_sched_wakeup_granularity = 
1000000UL;
 
 const_debug unsigned int sysctl_sched_migration_cost = 500000UL;
 
-/*
- * The exponential sliding  window over which load is averaged for shares
- * distribution.
- * (default: 10msec)
- */
-unsigned int __read_mostly sysctl_sched_shares_window = 10000000UL;
-
 #ifdef CONFIG_CFS_BANDWIDTH
 /*
  * Amount of runtime to allocate from global (tg) to local (per-cfs_rq) pool
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index a13bbdaab47d..2a361dc6e1eb 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -347,13 +347,6 @@ static struct ctl_table kern_table[] = {
                .mode           = 0644,
                .proc_handler   = proc_dointvec,
        },
-       {
-               .procname       = "sched_shares_window_ns",
-               .data           = &sysctl_sched_shares_window,
-               .maxlen         = sizeof(unsigned int),
-               .mode           = 0644,
-               .proc_handler   = proc_dointvec,
-       },
 #ifdef CONFIG_SCHEDSTATS
        {
                .procname       = "sched_schedstats",
-- 
2.10.0