Re: [PATCH 1/1] mm/khugepaged: skip copying lazyfree pages on collapse

[Lance Yang <ioworker0@xxxxxxxxx>]

On Fri, Feb 2, 2024 at 8:27 PM Michal Hocko <mhocko@xxxxxxxx> wrote:
>
> On Fri 02-02-24 19:18:31, Lance Yang wrote:
> > IMO, since it's treated the same as pte_none,
> > perhaps lazyfree pages shouldn't be copied to
> > the new huge page.
>
> Why? The content of MADV_FREE page is valid until it is reclaimed.

IMO, if MADV_FREE pages are considered valid until
reclaimed, treating them the same as pte_none might
pose a conflict.

Thanks,
Lance

> --
> Michal Hocko
> SUSE Labs