Re: [PATCH v1 19/26] mm: swap: prevent lruvec release in swap module

[Qi Zheng]

On 11/20/25 5:52 PM, Harry Yoo wrote:
> On Tue, Oct 28, 2025 at 09:58:32PM +0800, Qi Zheng wrote:
> > From: Muchun Song <songmuchun@xxxxxxxxxxxxx>
> >
> > In the near future, a folio will no longer pin its corresponding
> > memory cgroup. So an lruvec returned by folio_lruvec() could be
> > released without the rcu read lock or a reference to its memory
> > cgroup.
> >
> > In the current patch, the rcu read lock is employed to safeguard
> > against the release of the lruvec in lru_note_cost_refault() and
> > lru_activate().
>
> nit: the above paragraph looks incorrect.

Right, will fix it in the version.

> > This serves as a preparatory measure for the reparenting of the
> > LRU pages.
> >
> > Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
> > Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
> > ---
>
> Looks good to me,
> Reviewed-by: Harry Yoo <harry.yoo@xxxxxxxxxx>

Thanks!

>