Re: [PATCH v3 3/3] mm: memcontrol: correct the nr_pages parameter type of mem_cgroup_update_lru_size()

[Zi Yan]

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

> From: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
>
> The nr_pages parameter of mem_cgroup_update_lru_size() represents a page
> count. During the reparenting of LRU folios, the value passed to it can
> potentially exceed the maximum value of a 32-bit integer. It should be
> declared as long instead of int to match the types used in lruvec size
> accounting and to prevent possible overflow.
>
> Update the parameter type to long to ensure correctness.
>
> Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
> ---
>  include/linux/memcontrol.h | 2 +-
>  mm/memcontrol.c            | 4 ++--
>  2 files changed, 3 insertions(+), 3 deletions(-)
>
Acked-by: Zi Yan <ziy@xxxxxxxxxx>

Best Regards,
Yan, Zi