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Date:   Fri, 13 Aug 2021 13:36:01 +0100
From:   Chris Down <chris@chrisdown.name>
To:     yongw.pur@gmail.com
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Subject: Re: [PATCH v1] mm: Add configuration to control whether vmpressure
 notifier is enabled
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yongw.pur@gmail.com writes:
>From: wangyong <wang.yong12@zte.com.cn>
>Inspired by PSI features, vmpressure inotifier function should also be
>configured to decide whether it is used, because it is an independent
>feature which notifies the user of memory pressure.
>
>Since the vmpressure interface is used in kernel common code, for
>users who do not use the vmpressure function, there will be
>additional overhead.

Could you please demonstrate this additional overhead with profiles or 
demonstrations of other real world effects? Thanks.