Re: [PATCH v4 25/31] mm: vmscan: prepare for reparenting traditional LRU folios

[Shakeel Butt]

On Thu, Feb 05, 2026 at 05:01:44PM +0800, Qi Zheng wrote:
> From: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
> 
> To resolve the dying memcg issue, we need to reparent LRU folios of child
> memcg to its parent memcg. For traditional LRU list, each lruvec of every
> memcg comprises four LRU lists. Due to the symmetry of the LRU lists, it
> is feasible to transfer the LRU lists from a memcg to its parent memcg
> during the reparenting process.
> 
> This commit implements the specific function, which will be used during
> the reparenting process.
> 
> Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
> Reviewed-by: Harry Yoo <harry.yoo@xxxxxxxxxx>
> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
> Acked-by: Muchun Song <muchun.song@xxxxxxxxx>

Acked-by: Shakeel Butt <shakeel.butt@xxxxxxxxx>