Re: [PATCH RFC] mm: madvise: pageout: ignore references rather than clearing young

SeongJae Park
2024-02-24T20:12:23Z

On Sat, 24 Feb 2024 11:07:23 -0800 SeongJae Park <sj@kernel.org> wrote:

> Hi Barry,
>
> On Sat, 24 Feb 2024 12:37:59 +0800 Barry Song <21cnbao@gmail.com> wrote:
>
> [...]
> >
> > BTW\uff0c
> > Hi SeongJae,
> > I am not quite sure if damon also needs this, so I have kept damon as is by
> > setting ignore_references = false. MADV_PAGEOUT is an explicit hint users
> > don't want the memory to be reclaimed, I don't know if it is true for damon as
> > well. If you have some comments, please chime in.
>
> Thank you for calling my name :)
>
> For DAMON's usecase, the document simply says the behavior would be same to
> MADV_PAGEOUT, so if we conclude to change MADV_PAGEOUT, I think same change
> should be made for DAMON's usecase, or update DAMON document.

Thanks to Barry's nice explanation on my other reply to the patch, now I think
the change is modest, and therefore I'd prefer the first way: Changing DAMON's
usecase, and keep the document as is.

Thanks,
SJ

>
>
> Thanks,
> SJ
>
> >
> > >
> > > Thanks.
> >
> > Thanks
> > Barry