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Subject: Re: [RFC PATCH v1 00/11] Create fast idle path for short idle periods
To: Christoph Lameter <cl@linux.com>,
        Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>, Andi Kleen <ak@linux.intel.com>,
        Aubrey Li <aubrey.li@intel.com>, tglx@linutronix.de,
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From: "Li, Aubrey" <aubrey.li@linux.intel.com>
Message-ID: <5de2c77b-0c55-5fd9-64f6-aba67f111db5@linux.intel.com>
Date: Wed, 12 Jul 2017 10:07:50 +0800
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On 2017/7/12 1:58, Christoph Lameter wrote:
> On Tue, 11 Jul 2017, Frederic Weisbecker wrote:
> 
>>> --- a/kernel/time/tick-sched.c
>>> +++ b/kernel/time/tick-sched.c
>>> @@ -787,6 +787,7 @@ 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();
>>
>> This patch seems to make sense. Christoph?
> 
> Ok makes sense to me too. Was never entirely sure where the proper place
> would be to call it.
> 
Do we have another path to invoke tick_nohz_stop_sched_tick() in the interrupt exit context
for nohz full case?

Thanks,
-Aubrey