Re: [PATCH v4 11/19] mm, swap: split locked entry duplicating into a standalone helper

[Kairui Song]

On Thu, Dec 18, 2025 at 2:37 AM Kairui Song <ryncsn@xxxxxxxxx> wrote:
>
> On Wed, Dec 17, 2025 at 7:22 PM Baoquan He <bhe@xxxxxxxxxx> wrote:
> >
> > On 12/05/25 at 03:29am, Kairui Song wrote:
> > > From: Kairui Song <kasong@xxxxxxxxxxx>
> > >
> > > No feature change, split the common logic into a stand alone helper to
> >                                                    ~~~~~~~~~~~
> >                                                     standalone, typo?
> > > be reused later.
> >
> > In phase 2, I saw the newly added swap_dup_entries() is only called by
> > __swap_duplicate(). The 'reused later' means?
> >
>
> Ah you are right, this patch belongs to phase 3 I think, I can drop it
> for now, it's just a code rearrangement. Thanks!

Hi Baoquan

While working on V5 I noticed we do need this patch, the patch "mm,
swap: use swap cache as the swap in synchronize layer" needs this
splitted helper as an intermediate step. That usage will be dropped by
the end of this series but I think we can live with this splitted out
helper. The splitted helper and original help will all be gone in
phase 3, and there is no behavior change at all.