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

[Harry Yoo (Oracle)]

On Fri, Mar 27, 2026 at 06:16:30PM +0800, 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>
> ---

Looks good to me,
Reviewed-by: Harry Yoo (Oracle) <harry@xxxxxxxxxx>

-- 
Cheers,
Harry / Hyeonggon