linux-kernel - Re: [RFC PATCH 2/2] samples/damon: add `migrate_hot` and `migrate

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Message-Id: <20250703052831.39709-1-sj@kernel.org>
Date: Wed,  2 Jul 2025 22:28:31 -0700
From: SeongJae Park <sj@...nel.org>
To: Yunjeong Mun <yunjeong.mun@...com>
Cc: SeongJae Park <sj@...nel.org>,
	akpm@...ux-foundation.org,
	damon@...ts.linux.dev,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	kernel_team@...ynix.com,
	honggyu.kim@...com
Subject: Re: [RFC PATCH 2/2] samples/damon: add `migrate_hot` and `migrate_cold` knobs

On Thu,  3 Jul 2025 14:18:34 +0900 Yunjeong Mun <yunjeong.mun@...com> wrote:

> Hello SeongJae,
> 
> On Tue,  1 Jul 2025 17:08:25 -0700 SeongJae Park <sj@...nel.org> wrote:
> > Hello Yunjeong,
> > 
> > On Tue,  1 Jul 2025 17:54:17 +0900 Yunjeong Mun <yunjeong.mun@...com> wrote:
[...]
> > Because mtier is a sample code, I think it's primary goal is to help developers
> > know how they can use DAMON API functions for writing kernel code that is
> > required for a situation similar to the sample.  Hence the sample should be
> > clean and simple enough to be understood.
> 
> Thanks for explanation. I understand the intention of mtier module.
> As you mentioned, mtier is helpful for leraning how to configure and 
> run DAMON.

Glad to hear this sample is working for the intended goal!

[...]
> > But, I feel like this change is rather making code too longer and complicated.
> > Hence I would suggest dropping this patch if you agree.  Please let me know if
> > you have different opinions, or I'm missing something.
> > 
> 
> Ok, I will drop this patch in next version RFC. As you mentiond, mtier
> module should be simple and intuitive enough. I will consider this
> kind of tiering module to mm/damon. I'll send you RFC v2 soon.

Thank you for kindly accepting my suggestion.  Looking forward to the next
patches!


Thanks,
SJ

[...]