Re: [PATCH v1] mm: Add configuration to control whether vmpressure notifier is enabled

yongw.pur@gmail.com writes:

From: wangyong <redacted>
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.