Re: [PATCH 5/8] mm/mglru: use a smaller batch for reclaim

[Chen Ridong]

On 2026/3/18 3:09, Kairui Song via B4 Relay wrote:
> From: Kairui Song <kasong@xxxxxxxxxxx>
> 
> With a fixed number to reclaim calculated at the beginning, making each
> following step smaller should reduce the lock contention and avoid
> over-aggressive reclaim of folios, as it will abort earlier when the
> number of folios to be reclaimed is reached.
> 
> Signed-off-by: Kairui Song <kasong@xxxxxxxxxxx>
> ---
>  mm/vmscan.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/vmscan.c b/mm/vmscan.c
> index 4f4548ff3a17..2ff1609ff4de 100644
> --- a/mm/vmscan.c
> +++ b/mm/vmscan.c
> @@ -5007,7 +5007,7 @@ static bool try_to_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)
>  			break;
>  		}
>  
> -		nr_batch = min(nr_to_scan, MAX_LRU_BATCH);
> +		nr_batch = min(nr_to_scan, MIN_LRU_BATCH);
>  		delta = evict_folios(nr_batch, lruvec, sc, swappiness);
>  		if (!delta)
>  			break;
> 

LGTM.

Reviewed-by: Chen Ridong <chenridong@xxxxxxxxxxxxxxx>

-- 
Best regards,
Ridong