From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chris Down <chris@chrisdown.name>
Subject: Re: [PATCH v1] mm: Add configuration to control whether vmpressure
 notifier is enabled
Date: Fri, 13 Aug 2021 13:36:01 +0100
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To: yongw.pur@gmail.com
Cc: tj@kernel.org, corbet@lwn.net, akpm@linux-foundation.org, mhocko@kernel.org, vdavydov.dev@gmail.com, tglx@linutronix.de, peterz@infradead.org, shakeelb@google.com, guro@fb.com, alexs@kernel.org, richard.weiyang@gmail.com, sh_def@163.com, sfr@canb.auug.org.au, wang.yong12@zte.com.cn, cgroups@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, yang.yang29@zte.com.cn

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.