On Jan 28, 2020, at 5:50 AM, sjpark@amazon.com wrote:

For the comments from perf maintainers, I added Steven Rostedt and Arnaldo
Carvalho de Melo first, but I might missed someone.  If you recommend some more
people, I will add them to recipients.

I made DAMON as a new subsystem because I think no existing subsystem fits well
to be a base of DAMON, due to DAMON's unique goals and mechanisms described
below in the original cover letter.

The existing subsystem that most similar to DAMON might be 'mm/page_idle.c'.
However, there are many conceptual differences with DAMON.  One biggest
difference I think is the target.  'page_idle' deals with physical page frames
while DAMON deals with virtual address of specific processes.

Nevertheless, if you have some different opinion, please let me know.

I thought everyone should know to go to the MAINTAINERS file and search PERFORMANCE EVENTS SUBSYSTEM.

It might be difficult but there is a perf subcommand for some subsystems like sched: tracing/measuring of scheduler actions and latencies.