linux-kernel - [tip:sched/core] sched: Add missing call to calc_load_exit

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Message-ID: <tip-749c8814f08f12baa4a9c2812a7c6ede7d69507d@git.kernel.org>
Date:	Tue, 4 Sep 2012 11:44:49 -0700
From:	tip-bot for Charles Wang <muming.wq@...bao.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	muming.wq@...bao.com, a.p.zijlstra@...llo.nl, tglx@...utronix.de
Subject: [tip:sched/core] sched: Add missing call to calc_load_exit_idle()

Commit-ID:  749c8814f08f12baa4a9c2812a7c6ede7d69507d
Gitweb:     http://git.kernel.org/tip/749c8814f08f12baa4a9c2812a7c6ede7d69507d
Author:     Charles Wang <muming.wq@...bao.com>
AuthorDate: Mon, 20 Aug 2012 16:02:33 +0800
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 4 Sep 2012 14:30:29 +0200

sched: Add missing call to calc_load_exit_idle()

Azat Khuzhin reported high loadavg in Linux v3.6

After checking the upstream scheduler code, I found Peter's commit:

  5167e8d5417b sched/nohz: Rewrite and fix load-avg computation -- again

not fully applied, missing the call to calc_load_exit_idle().

After that idle exit in sampling window will always be calculated
to non-idle, and the load will be higher than normal.

This patch adds the missing call to calc_load_exit_idle().

Signed-off-by: Charles Wang <muming.wq@...bao.com>
Cc: stable@...nel.org
Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/r/1345449754-27130-1-git-send-email-muming.wq@gmail.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 kernel/time/tick-sched.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 024540f..3a9e5d5 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -573,6 +573,7 @@ static void tick_nohz_restart_sched_tick(struct tick_sched *ts, ktime_t now)
 	tick_do_update_jiffies64(now);
 	update_cpu_load_nohz();
 
+	calc_load_exit_idle();
 	touch_softlockup_watchdog();
 	/*
 	 * Cancel the scheduled timer and restore the tick
--
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