DAMON_{VADDR,PADDR,SYSFS} are de-facto essential parts of DAMON for
normal usages.  Because those need to be enabled one by one, however,
and there are other test-purpose or non-essential configurations, it is
easy to be confused and make mistakes at setup.  Make the essential
configurations default to CONFIG_DAMON, so that those can be enabled by
default with a single change.

Signed-off-by: SeongJae Park <sj@kernel.org>
---
 mm/damon/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mm/damon/Kconfig b/mm/damon/Kconfig
index c213cf8b5638..c93d0c56b963 100644
--- a/mm/damon/Kconfig
+++ b/mm/damon/Kconfig
@@ -28,6 +28,7 @@ config DAMON_VADDR
 	bool "Data access monitoring operations for virtual address spaces"
 	depends on DAMON && MMU
 	select PAGE_IDLE_FLAG
+	default DAMON
 	help
 	  This builds the default data access monitoring operations for DAMON
 	  that work for virtual address spaces.
@@ -36,6 +37,7 @@ config DAMON_PADDR
 	bool "Data access monitoring operations for the physical address space"
 	depends on DAMON && MMU
 	select PAGE_IDLE_FLAG
+	default DAMON
 	help
 	  This builds the default data access monitoring operations for DAMON
 	  that works for the physical address space.
@@ -55,6 +57,7 @@ config DAMON_VADDR_KUNIT_TEST
 config DAMON_SYSFS
 	bool "DAMON sysfs interface"
 	depends on DAMON && SYSFS
+	default DAMON
 	help
 	  This builds the sysfs interface for DAMON.  The user space can use
 	  the interface for arbitrary data access monitoring.
-- 
2.39.5

Hi SeongJae,

This is the patch I was waiting for.  Since enabling DAMON build doesn't
directly impact the kernel behaviors as it is disabled by default.

On 5/21/2025 1:27 PM, SeongJae Park wrote:
> DAMON_{VADDR,PADDR,SYSFS} are de-facto essential parts of DAMON for
> normal usages.  Because those need to be enabled one by one, however,
> and there are other test-purpose or non-essential configurations, it is
> easy to be confused and make mistakes at setup.  Make the essential
> configurations default to CONFIG_DAMON, so that those can be enabled by
> default with a single change.
> 
> Signed-off-by: SeongJae Park <sj@kernel.org>
> ---
>   mm/damon/Kconfig | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/mm/damon/Kconfig b/mm/damon/Kconfig
> index c213cf8b5638..c93d0c56b963 100644
> --- a/mm/damon/Kconfig
> +++ b/mm/damon/Kconfig
> @@ -28,6 +28,7 @@ config DAMON_VADDR
>   	bool "Data access monitoring operations for virtual address spaces"
>   	depends on DAMON && MMU
>   	select PAGE_IDLE_FLAG
> +	default DAMON
>   	help
>   	  This builds the default data access monitoring operations for DAMON
>   	  that work for virtual address spaces.
> @@ -36,6 +37,7 @@ config DAMON_PADDR
>   	bool "Data access monitoring operations for the physical address space"
>   	depends on DAMON && MMU
>   	select PAGE_IDLE_FLAG
> +	default DAMON
>   	help
>   	  This builds the default data access monitoring operations for DAMON
>   	  that works for the physical address space.
> @@ -55,6 +57,7 @@ config DAMON_VADDR_KUNIT_TEST
>   config DAMON_SYSFS
>   	bool "DAMON sysfs interface"
>   	depends on DAMON && SYSFS
> +	default DAMON
>   	help
>   	  This builds the sysfs interface for DAMON.  The user space can use
>   	  the interface for arbitrary data access monitoring.

I'm not sure if I'm elighble to ack your patch, but I would like to add

	Acked-by: Honggyu Kim <honggyu.kim@sk.com>

Thanks,
Honggyu

On Thu, 22 May 2025 14:54:33 +0900 Honggyu Kim <honggyu.kim@sk.com> wrote:

> Hi SeongJae,
> 
> This is the patch I was waiting for.

I'm more than glad to hear this :)  Also appreciate/apology for your wait.

[...]
> I'm not sure if I'm elighble to ack your patch, but

I pretty sure you're eligible.

> I would like to add
> 
> 	Acked-by: Honggyu Kim <honggyu.kim@sk.com>

Thank you, this means a lot to me!


Thanks,
SJ

[...]