From 62cb1188ed86a9cf082fd2f757d4dd9b54741f24 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Tue, 29 Aug 2017 15:07:54 +0200 Subject: sched/idle: Move quiet_vmstate() into the NOHZ code quiet_vmstat() is an expensive function that only makes sense when we go into NOHZ. Signed-off-by: Peter Zijlstra (Intel) Cc: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: aubrey.li@linux.intel.com Cc: cl@linux.com Cc: fweisbec@gmail.com Signed-off-by: Ingo Molnar --- kernel/sched/idle.c | 1 - kernel/time/tick-sched.c | 2 ++ 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index 257f4f0b4532..b2e8f0afbb42 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -219,7 +219,6 @@ static void do_idle(void) */ __current_set_polling(); - quiet_vmstat(); tick_nohz_idle_enter(); while (!need_resched()) { diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index c7a899c5ce64..7b258c59d78a 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -27,6 +27,7 @@ #include #include #include +#include #include @@ -787,6 +788,7 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts, if (!ts->tick_stopped) { calc_load_nohz_start(); cpu_load_update_nohz_start(); + quiet_vmstat(); ts->last_tick = hrtimer_get_expires(&ts->sched_timer); ts->tick_stopped = 1; -- cgit