linux-kernel - [PATCH 2/2] mm/damon/Kconfig: enable CONFIG

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Message-Id: <20250521042755.39653-3-sj@kernel.org>
Date: Tue, 20 May 2025 21:27:55 -0700
From: SeongJae Park <sj@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: SeongJae Park <sj@...nel.org>,
	damon@...ts.linux.dev,
	kernel-team@...a.com,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH 2/2] mm/damon/Kconfig: enable CONFIG_DAMON by default

As of this writing, multiple major distros including Alma, Amazon,
Android, CentOS, Debian, Fedora, and Oracle are build-enabling DAMON
(set CONFIG_DAMON[1]).  Enabling it by default will save configuration
setup time for the current and future DAMON users.

Build-enabling DAMON does not introduce a real risk since it makes no
behavioral change by default.  It requires explicit user requests to do
anything.  Only one potential risk is making the size of the kernel a
little bit larger.  On a production-purpose configuration, it increases
the resulting kernel package size by about 0.1 % of the final package
file.  I believe that's too small to be a real problem in common setups.

Hence, the benefit of enabling CONFIG_DAMON outweighs the potential
risk.  Set CONFIG_DAMON by default.

[1] https://oracle.github.io/kconfigs/?config=UTS_RELEASE&config=DAMON

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 mm/damon/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/damon/Kconfig b/mm/damon/Kconfig
index c93d0c56b963..551745df011b 100644
--- a/mm/damon/Kconfig
+++ b/mm/damon/Kconfig
@@ -4,6 +4,7 @@ menu "Data Access Monitoring"

 config DAMON
 	bool "DAMON: Data Access Monitoring Framework"
+	default y
 	help
 	  This builds a framework that allows kernel subsystems to monitor
 	  access frequency of each memory region. The information can be useful
-- 
2.39.5