Re: [PATCH V2] mm/memcontrol: add per-memcg pgpgin/pswpin counter

[Andrew Morton]

On Fri, 13 Sep 2024 16:44:53 +0800 Jingxiang Zeng <jingxiangzeng.cas@xxxxxxxxx> wrote:

> From: Jingxiang Zeng <linuszeng@xxxxxxxxxxx>
> 
> In proactive memory reclamation scenarios, it is necessary to estimate the
> pswpin and pswpout metrics of the cgroup to determine whether to continue
> reclaiming anonymous pages in the current batch.  This patch will collect
> these metrics and expose them.
> 

Please explain the differences between v1 and v2:

--- a/mm/memcontrol-v1.c~mm-memcontrol-add-per-memcg-pgpgin-pswpin-counter-v2
+++ a/mm/memcontrol-v1.c
@@ -2729,8 +2729,6 @@ static const char *const memcg1_stat_nam
 static const unsigned int memcg1_events[] = {
 	PGPGIN,
 	PGPGOUT,
-	PSWPIN,
-	PSWPOUT,
 	PGFAULT,
 	PGMAJFAULT,
 };
_