correct the parameter type of some mm functions

[PATCH 0/3] correct the parameter type of some mm functions

Posted by Qi Zheng 1 week, 2 days ago

From: Qi Zheng <zhengqi.arch@bytedance.com>

Hi all,

As Harry Yoo pointed out [1], in the case of reparenting LRU folios, the value
passed to functions such as __mod_memcg{_lruvec}_state() may exceed the upper
limit of int, so this series aims to correct the parameter type of these
functions.

This series is based on the next-20260323.

Comments and suggestions are welcome!

Thanks,
Qi

[1]. https://lore.kernel.org/all/acDxaEgnqPI-Z4be@hyeyoo/

Qi Zheng (3):
  mm: memcontrol: correct the type of stats_updates to unsigned long
  mm: memcontrol: correct the parameter type of
    __mod_memcg{_lruvec}_state()
  mm: memcontrol: correct the nr_pages parameter type of
    mem_cgroup_update_lru_size()

 include/linux/memcontrol.h   |  2 +-
 include/trace/events/memcg.h | 10 +++++-----
 mm/memcontrol.c              | 28 ++++++++++++++--------------
 3 files changed, 20 insertions(+), 20 deletions(-)

-- 
2.20.1

Re: [PATCH 0/3] correct the parameter type of some mm functions

Posted by Lorenzo Stoakes (Oracle) 1 week, 2 days ago

-cc old mail

(just a gentle nudge to send stuff to ljs@kernel.org instead thanks :)

On Tue, Mar 24, 2026 at 07:31:25PM +0800, Qi Zheng wrote:
> From: Qi Zheng <zhengqi.arch@bytedance.com>
>
> Hi all,
>
> As Harry Yoo pointed out [1], in the case of reparenting LRU folios, the value
> passed to functions such as __mod_memcg{_lruvec}_state() may exceed the upper
> limit of int, so this series aims to correct the parameter type of these
> functions.
>
> This series is based on the next-20260323.
>
> Comments and suggestions are welcome!
>
> Thanks,
> Qi
>
> [1]. https://lore.kernel.org/all/acDxaEgnqPI-Z4be@hyeyoo/
>
> Qi Zheng (3):
>   mm: memcontrol: correct the type of stats_updates to unsigned long
>   mm: memcontrol: correct the parameter type of
>     __mod_memcg{_lruvec}_state()
>   mm: memcontrol: correct the nr_pages parameter type of
>     mem_cgroup_update_lru_size()
>
>  include/linux/memcontrol.h   |  2 +-
>  include/trace/events/memcg.h | 10 +++++-----
>  mm/memcontrol.c              | 28 ++++++++++++++--------------
>  3 files changed, 20 insertions(+), 20 deletions(-)
>
> --
> 2.20.1
>