[PATCH v2] mm/damon/core: remove duplicate list_empty quota->goals check

[PATCH v2] mm/damon/core: remove duplicate list_empty quota->goals check

[Honggyu Kim]

The damos_set_effective_quota checks quota contidions but there are some
duplicate checks for quota->goals inside.

This patch reduces one of if statement to simplify the esz calculation
logic by setting esz as ULONG_MAX by default.

Signed-off-by: Honggyu Kim <honggyu.kim@sk.com>
---
 mm/damon/core.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/mm/damon/core.c b/mm/damon/core.c
index 511c3f61ab44..ecaf78270035 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -1542,7 +1542,7 @@ static unsigned long damos_quota_score(struct damos_quota *quota)
 static void damos_set_effective_quota(struct damos_quota *quota)
 {
 	unsigned long throughput;
-	unsigned long esz;
+	unsigned long esz = ULONG_MAX;
 
 	if (!quota->ms && list_empty(&quota->goals)) {
 		quota->esz = quota->sz;
@@ -1564,10 +1564,7 @@ static void damos_set_effective_quota(struct damos_quota *quota)
 				quota->total_charged_ns;
 		else
 			throughput = PAGE_SIZE * 1024;
-		if (!list_empty(&quota->goals))
-			esz = min(throughput * quota->ms, esz);
-		else
-			esz = throughput * quota->ms;
+		esz = min(throughput * quota->ms, esz);
 	}
 
 	if (quota->sz && quota->sz < esz)

base-commit: adc218676eef25575469234709c2d87185ca223a
-- 
2.34.1

Re: [PATCH v2] mm/damon/core: remove duplicate list_empty quota->goals check

[SeongJae Park]

On Mon, 25 Nov 2024 13:56:55 +0900 Honggyu Kim <honggyu.kim@sk.com> wrote:

> The damos_set_effective_quota checks quota contidions but there are some
> duplicate checks for quota->goals inside.
> 
> This patch reduces one of if statement to simplify the esz calculation
> logic by setting esz as ULONG_MAX by default.
> 
> Signed-off-by: Honggyu Kim <honggyu.kim@sk.com>

Reviewed-by: SeongJae Park <sj@kernel.org>

> ---
>  mm/damon/core.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/mm/damon/core.c b/mm/damon/core.c
> index 511c3f61ab44..ecaf78270035 100644
> --- a/mm/damon/core.c
> +++ b/mm/damon/core.c
> @@ -1542,7 +1542,7 @@ static unsigned long damos_quota_score(struct damos_quota *quota)
>  static void damos_set_effective_quota(struct damos_quota *quota)
>  {
>  	unsigned long throughput;
> -	unsigned long esz;
> +	unsigned long esz = ULONG_MAX;
>  
>  	if (!quota->ms && list_empty(&quota->goals)) {
>  		quota->esz = quota->sz;
> @@ -1564,10 +1564,7 @@ static void damos_set_effective_quota(struct damos_quota *quota)
>  				quota->total_charged_ns;
>  		else
>  			throughput = PAGE_SIZE * 1024;
> -		if (!list_empty(&quota->goals))
> -			esz = min(throughput * quota->ms, esz);
> -		else
> -			esz = throughput * quota->ms;
> +		esz = min(throughput * quota->ms, esz);
>  	}
>  
>  	if (quota->sz && quota->sz < esz)
> 
> base-commit: adc218676eef25575469234709c2d87185ca223a
> -- 
> 2.34.1

Thank you for addressing my comments on the v1
(https://lore.kernel.org/20241122081834.1344-1-honggyu.kim@sk.com), namely
- making commit message more specific, and
- using ULONG_MAX instead of UINT_MAX for esz default value.


Thanks,
SJ