From mboxrd@z Thu Jan 1 00:00:00 1970 From: akpm@linux-foundation.org Subject: [merged] sched-update-the-idle-statistics-in-get_cpu_idle_time_us.patch removed from -mm tree Date: Tue, 11 May 2010 12:16:47 -0400 Message-ID: <201005111918.o4BJIFR4018189@imap1.linux-foundation.org> Reply-To: linux-kernel@vger.kernel.org Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:34714 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752507Ab0EKTSS (ORCPT ); Tue, 11 May 2010 15:18:18 -0400 Sender: mm-commits-owner@vger.kernel.org List-Id: mm-commits@vger.kernel.org To: arjan@linux.intel.com, mm-commits@vger.kernel.org The patch titled sched: update the idle statistics in get_cpu_idle_time_us() has been removed from the -mm tree. Its filename was sched-update-the-idle-statistics-in-get_cpu_idle_time_us.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: sched: update the idle statistics in get_cpu_idle_time_us() From: Arjan van de Ven Right now, get_cpu_idle_time_us() only reports the idle statistics upto the point the CPU entered last idle; not what is valid right now. This patch adds an update of the idle statistics to get_cpu_idle_time_us(), so that calling this function always returns statistics that are accurate at the point of the call. This includes resetting the start of the idle time for accounting purposes to avoid double accounting. Signed-off-by: Arjan van de Ven Signed-off-by: Andrew Morton --- kernel/time/tick-sched.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff -puN kernel/time/tick-sched.c~sched-update-the-idle-statistics-in-get_cpu_idle_time_us kernel/time/tick-sched.c --- a/kernel/time/tick-sched.c~sched-update-the-idle-statistics-in-get_cpu_idle_time_us +++ a/kernel/time/tick-sched.c @@ -161,6 +161,7 @@ static void update_ts_time_stats(struct if (ts->idle_active) { delta = ktime_sub(now, ts->idle_entrytime); ts->idle_sleeptime = ktime_add(ts->idle_sleeptime, delta); + ts->idle_entrytime = now; } } @@ -205,14 +206,18 @@ static ktime_t tick_nohz_start_idle(stru u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time) { struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu); + ktime_t now; if (!tick_nohz_enabled) return -1; + now = ktime_get(); + update_ts_time_stats(ts, now); + if (ts->idle_active) *last_update_time = ktime_to_us(ts->idle_lastupdate); else - *last_update_time = ktime_to_us(ktime_get()); + *last_update_time = ktime_to_us(now); return ktime_to_us(ts->idle_sleeptime); } _ Patches currently in -mm which might be from arjan@linux.intel.com are linux-next.patch cpuidle-add-a-repeating-pattern-detector-to-the-menu-governor.patch