Re: [PATCH v3 1/3] mm: memcontrol: correct the type of stats_updates to unsigned long

[Zi Yan]

On 27 Mar 2026, at 6:16, Qi Zheng wrote:

> From: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
>
> The memcg_rstat_updated() tracks updates for vmstats_percpu->state
> and lruvec_stats_percpu->state. Since these state values are of type long,
> change the val parameter passed to memcg_rstat_updated() to long as well.
>
> Correspondingly, change the type of stats_updates in struct
> memcg_vmstats_percpu and struct memcg_vmstats from unsigned int and
> atomic_t to unsigned long and atomic_long_t respectively to prevent
> potential overflow when handling large state updates during the
> reparenting of LRU folios.
>
> Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
> Reviewed-by: Lorenzo Stoakes (Oracle) <ljs@xxxxxxxxxx>
> ---
>  mm/memcontrol.c | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
>

Acked-by: Zi Yan <ziy@xxxxxxxxxx>

Best Regards,
Yan, Zi