Re: [PATCH v4 28/31] mm: workingset: use lruvec_lru_size() to get the number of lru pages

[Muchun Song]

> On Feb 5, 2026, at 17:01, Qi Zheng <qi.zheng@xxxxxxxxx> wrote:
> 
> From: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
> 
> For cgroup v2, count_shadow_nodes() is the only place to read
> non-hierarchical stats (lruvec_stats->state_local). To avoid the need to
> consider cgroup v2 during subsequent non-hierarchical stats reparenting,
> use lruvec_lru_size() instead of lruvec_page_state_local() to get the
> number of lru pages.
> 
> For NR_SLAB_RECLAIMABLE_B and NR_SLAB_UNRECLAIMABLE_B cases, it appears
> that the statistics here have already been problematic for a while since
> slab pages have been reparented. So just ignore it for now.
> 
> Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>

Acked-by: Muchun Song <muchun.song@xxxxxxxxx>