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[PATCH v2 1/2] mm/damon: Move has filter to ops-common

Yueyang Pan posted 2 patches 2 months, 1 week ago
There is a newer version of this series
[PATCH v2 1/2] mm/damon: Move has filter to ops-common
Posted by Yueyang Pan 2 months, 1 week ago 
This patch moves damon_pa_scheme_has_filter to ops-common. renaming
to damon_scheme_has_filter.
Doing so allows us to reuse its logic in the vaddr version
of DAMOS_STAT

Signed-off-by: Yueyang Pan <pyyjason@gmail.com>
---
 mm/damon/ops-common.c |  9 +++++++++
 mm/damon/ops-common.h |  2 ++
 mm/damon/paddr.c      | 11 +----------
 3 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/mm/damon/ops-common.c b/mm/damon/ops-common.c
index 99321ff5cb92..3ebfa356ca46 100644
--- a/mm/damon/ops-common.c
+++ b/mm/damon/ops-common.c
@@ -412,3 +412,12 @@ unsigned long damon_migrate_pages(struct list_head *folio_list, int target_nid)
 
 	return nr_migrated;
 }
+
+bool damon_scheme_has_filter(struct damos *s)
+{
+	struct damos_filter *f;
+
+	damos_for_each_ops_filter(f, s)
+		return true;
+	return false;
+}
diff --git a/mm/damon/ops-common.h b/mm/damon/ops-common.h
index 61ad54aaf256..8d5c5c7631ac 100644
--- a/mm/damon/ops-common.h
+++ b/mm/damon/ops-common.h
@@ -21,3 +21,5 @@ int damon_hot_score(struct damon_ctx *c, struct damon_region *r,
 
 bool damos_folio_filter_match(struct damos_filter *filter, struct folio *folio);
 unsigned long damon_migrate_pages(struct list_head *folio_list, int target_nid);
+
+bool damon_scheme_has_filter(struct damos *s);
diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index 53a55c5114fb..daeceed981a0 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -262,22 +262,13 @@ static unsigned long damon_pa_migrate(struct damon_region *r, struct damos *s,
 	return applied * PAGE_SIZE;
 }
 
-static bool damon_pa_scheme_has_filter(struct damos *s)
-{
-	struct damos_filter *f;
-
-	damos_for_each_ops_filter(f, s)
-		return true;
-	return false;
-}
-
 static unsigned long damon_pa_stat(struct damon_region *r, struct damos *s,
 		unsigned long *sz_filter_passed)
 {
 	unsigned long addr;
 	struct folio *folio;
 
-	if (!damon_pa_scheme_has_filter(s))
+	if (!damon_scheme_has_filter(s))
 		return 0;
 
 	addr = r->ar.start;
-- 
2.47.3
Re: [PATCH v2 1/2] mm/damon: Move has filter to ops-common
Posted by SeongJae Park 2 months, 1 week ago 
On Wed, 30 Jul 2025 10:19:55 -0700 Yueyang Pan <pyyjason@gmail.com> wrote:

> This patch moves damon_pa_scheme_has_filter to ops-common. renaming
> to damon_scheme_has_filter.
> Doing so allows us to reuse its logic in the vaddr version
> of DAMOS_STAT
> 
> Signed-off-by: Yueyang Pan <pyyjason@gmail.com>
> ---
>  mm/damon/ops-common.c |  9 +++++++++
>  mm/damon/ops-common.h |  2 ++
>  mm/damon/paddr.c      | 11 +----------
>  3 files changed, 12 insertions(+), 10 deletions(-)
> 
> diff --git a/mm/damon/ops-common.c b/mm/damon/ops-common.c
> index 99321ff5cb92..3ebfa356ca46 100644
> --- a/mm/damon/ops-common.c
> +++ b/mm/damon/ops-common.c
> @@ -412,3 +412,12 @@ unsigned long damon_migrate_pages(struct list_head *folio_list, int target_nid)
>  
>  	return nr_migrated;
>  }
> +
> +bool damon_scheme_has_filter(struct damos *s)
> +{
> +	struct damos_filter *f;
> +
> +	damos_for_each_ops_filter(f, s)
> +		return true;
> +	return false;
> +}

I should have tell this earlier, sorry.  I now think it would be good to have
ops-common.c own prefix, since this namee makes me expect the function is on
DAMON core layer.  Also, I use normal 'grep' and ctags at the best, and maybe
I'm not the only one that that lazy at learning new tools.

Following the weird and none-public naming convention we have on DAMON,
damos_ops_ for DAMOS-related functions and damon_ops_ for monitoring-related
functions would be the prefix for ops-common.c.

So, what about renaming this to damos_ops_has_filter() if we have a chance to
revision this once again?

> diff --git a/mm/damon/ops-common.h b/mm/damon/ops-common.h
> index 61ad54aaf256..8d5c5c7631ac 100644
> --- a/mm/damon/ops-common.h
> +++ b/mm/damon/ops-common.h
> @@ -21,3 +21,5 @@ int damon_hot_score(struct damon_ctx *c, struct damon_region *r,
>  
>  bool damos_folio_filter_match(struct damos_filter *filter, struct folio *folio);
>  unsigned long damon_migrate_pages(struct list_head *folio_list, int target_nid);
> +
> +bool damon_scheme_has_filter(struct damos *s);
> diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
> index 53a55c5114fb..daeceed981a0 100644
> --- a/mm/damon/paddr.c
> +++ b/mm/damon/paddr.c
> @@ -262,22 +262,13 @@ static unsigned long damon_pa_migrate(struct damon_region *r, struct damos *s,
>  	return applied * PAGE_SIZE;
>  }
>  
> -static bool damon_pa_scheme_has_filter(struct damos *s)
> -{
> -	struct damos_filter *f;
> -
> -	damos_for_each_ops_filter(f, s)
> -		return true;
> -	return false;
> -}
> -
>  static unsigned long damon_pa_stat(struct damon_region *r, struct damos *s,
>  		unsigned long *sz_filter_passed)
>  {
>  	unsigned long addr;
>  	struct folio *folio;
>  
> -	if (!damon_pa_scheme_has_filter(s))
> +	if (!damon_scheme_has_filter(s))
>  		return 0;
>  
>  	addr = r->ar.start;
> -- 
> 2.47.3

Otherwise, all looks good to me.


Thanks,
SJ
Re: [PATCH v2 1/2] mm/damon: Move has filter to ops-common
Posted by YUEYANG PAN 2 months ago 
On Wed, Jul 30, 2025 at 10:45:06AM -0700, SeongJae Park wrote:
> On Wed, 30 Jul 2025 10:19:55 -0700 Yueyang Pan <pyyjason@gmail.com> wrote:
> 
> > This patch moves damon_pa_scheme_has_filter to ops-common. renaming
> > to damon_scheme_has_filter.
> > Doing so allows us to reuse its logic in the vaddr version
> > of DAMOS_STAT
> > 
> > Signed-off-by: Yueyang Pan <pyyjason@gmail.com>
> > ---
> >  mm/damon/ops-common.c |  9 +++++++++
> >  mm/damon/ops-common.h |  2 ++
> >  mm/damon/paddr.c      | 11 +----------
> >  3 files changed, 12 insertions(+), 10 deletions(-)
> > 
> > diff --git a/mm/damon/ops-common.c b/mm/damon/ops-common.c
> > index 99321ff5cb92..3ebfa356ca46 100644
> > --- a/mm/damon/ops-common.c
> > +++ b/mm/damon/ops-common.c
> > @@ -412,3 +412,12 @@ unsigned long damon_migrate_pages(struct list_head *folio_list, int target_nid)
> >  
> >  	return nr_migrated;
> >  }
> > +
> > +bool damon_scheme_has_filter(struct damos *s)
> > +{
> > +	struct damos_filter *f;
> > +
> > +	damos_for_each_ops_filter(f, s)
> > +		return true;
> > +	return false;
> > +}
> 
> I should have tell this earlier, sorry.  I now think it would be good to have
> ops-common.c own prefix, since this namee makes me expect the function is on
> DAMON core layer.  Also, I use normal 'grep' and ctags at the best, and maybe
> I'm not the only one that that lazy at learning new tools.
> 
> Following the weird and none-public naming convention we have on DAMON,
> damos_ops_ for DAMOS-related functions and damon_ops_ for monitoring-related
> functions would be the prefix for ops-common.c.
> 
> So, what about renaming this to damos_ops_has_filter() if we have a chance to
> revision this once again?

Thanks. I will fix it in the next version.

> 
> > diff --git a/mm/damon/ops-common.h b/mm/damon/ops-common.h
> > index 61ad54aaf256..8d5c5c7631ac 100644
> > --- a/mm/damon/ops-common.h
> > +++ b/mm/damon/ops-common.h
> > @@ -21,3 +21,5 @@ int damon_hot_score(struct damon_ctx *c, struct damon_region *r,
> >  
> >  bool damos_folio_filter_match(struct damos_filter *filter, struct folio *folio);
> >  unsigned long damon_migrate_pages(struct list_head *folio_list, int target_nid);
> > +
> > +bool damon_scheme_has_filter(struct damos *s);
> > diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
> > index 53a55c5114fb..daeceed981a0 100644
> > --- a/mm/damon/paddr.c
> > +++ b/mm/damon/paddr.c
> > @@ -262,22 +262,13 @@ static unsigned long damon_pa_migrate(struct damon_region *r, struct damos *s,
> >  	return applied * PAGE_SIZE;
> >  }
> >  
> > -static bool damon_pa_scheme_has_filter(struct damos *s)
> > -{
> > -	struct damos_filter *f;
> > -
> > -	damos_for_each_ops_filter(f, s)
> > -		return true;
> > -	return false;
> > -}
> > -
> >  static unsigned long damon_pa_stat(struct damon_region *r, struct damos *s,
> >  		unsigned long *sz_filter_passed)
> >  {
> >  	unsigned long addr;
> >  	struct folio *folio;
> >  
> > -	if (!damon_pa_scheme_has_filter(s))
> > +	if (!damon_scheme_has_filter(s))
> >  		return 0;
> >  
> >  	addr = r->ar.start;
> > -- 
> > 2.47.3
> 
> Otherwise, all looks good to me.
> 
> 
> Thanks,
> SJ

Best Wishes
Pan

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