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Subject: Re: [PATCH 2/3] mm: Handle numa statistics distinctively based-on
 different VM stats modes
To: kemi <kemi.wang@intel.com>, Michal Hocko <mhocko@kernel.org>
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Cc: "Luis R . Rodriguez" <mcgrof@kernel.org>,
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From: Dave Hansen <dave.hansen@linux.intel.com>
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Date: Sun, 17 Sep 2017 21:13:13 -0700
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On 09/17/2017 08:07 PM, kemi wrote:
>>> +	if (vmstat_mode) {
>>> +		if (vmstat_mode == VMSTAT_COARSE_MODE)
>>> +			return;
>>> +	} else if (disable_zone_statistics)
>>> +		return;
>>> +
>>>  	if (z->node != numa_node_id())
>>>  		local_stat = NUMA_OTHER;
>>
>> A jump label could make this completely out of the way for the case
>> where every single cycle matters.
> 
> Could you be more explicit for how to implement it here. Thanks very much.

Take a look at include/linux/jump_label.h.