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From: SeongJae Park <sj@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: SeongJae Park <sj@kernel.org>,
	damon@lists.linux.dev, kernel-team@meta.com,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: [PATCH 2/2] mm/damon/Kconfig: enable CONFIG_DAMON by default
Date: Tue, 20 May 2025 21:27:55 -0700	[thread overview]
Message-ID: <20250521042755.39653-3-sj@kernel.org> (raw)
In-Reply-To: <20250521042755.39653-1-sj@kernel.org>

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@kernel.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


  parent reply	other threads:[~2025-05-21  4:28 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-05-21  4:27 [PATCH 0/2] mm/damon: build-enable essential DAMON components " SeongJae Park
2025-05-21  4:27 ` [PATCH 1/2] mm/damon/Kconfig: set DAMON_{VADDR,PADDR,SYSFS} default to DAMON SeongJae Park
2025-05-22  5:54   ` Honggyu Kim
2025-05-22 17:10     ` SeongJae Park
2025-05-21  4:27 ` SeongJae Park [this message]
2025-05-22  5:55   ` [PATCH 2/2] mm/damon/Kconfig: enable CONFIG_DAMON by default Honggyu Kim

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