When we restart the tick, we catch up with the CPU loads
statistics. But we also scale down the rt power. This
require an uptodate rq clock.
DISCLAIMER: I don't know if this is needed when we wake
up from idle. May be this is handled from the reader side
in scale_rt_power(). I have yet to understand exactly what
this function does.
Also scale_rt_power() also need to handle full tickless
CPUs when they run RT tasks. And also to remotely handle
the missing scaling down usually performed from the tick.
Signed-off-by: Frederic Weisbecker <fweis...@gmail.com>
Cc: Alessio Igor Bogani <abog...@kernel.org>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Chris Metcalf <cmetc...@tilera.com>
Cc: Christoph Lameter <c...@linux.com>
Cc: Geoff Levand <ge...@infradead.org>
Cc: Gilad Ben Yossef <gi...@benyossef.com>
Cc: Hakan Akkan <hakanak...@gmail.com>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Li Zhong <zh...@linux.vnet.ibm.com>
Cc: Namhyung Kim <namhyung....@lge.com>
Cc: Paul E. McKenney <paul...@linux.vnet.ibm.com>
Cc: Paul Gortmaker <paul.gortma...@windriver.com>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Steven Rostedt <rost...@goodmis.org>
Cc: Thomas Gleixner <t...@linutronix.de>
---
kernel/sched/core.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 8dfc461..b35d122 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2650,6 +2650,7 @@ void update_cpu_load_nohz(void)
pending_updates = curr_jiffies - this_rq->last_load_update_tick;
if (pending_updates) {
this_rq->last_load_update_tick = curr_jiffies;
+ update_rq_clock(this_rq);
/*
* We were idle, this means load 0, the current load might be
* !0 due to remote wakeups and the sort.
--
1.7.5.4
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