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

Chen Ridong
2026-03-24T07:51:48Z

On 2026/3/18 3:09, Kairui Song via B4 Relay wrote:
> From: Kairui Song <kasong@tencent.com>
>
> 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@tencent.com>
> ---
> 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@huaweicloud.com>

--
Best regards,
Ridong