[PATCH v10 06/14] mm: multi-gen LRU: minimal implementation

[Yu Zhao]

On Fri, Apr 15, 2022 at 4:16 AM Barry Song <21cnbao at gmail.com> wrote:
>
> On Fri, Apr 15, 2022 at 9:40 AM Andrew Morton <akpm at linux-foundation.org> wrote:
> >
> > On Thu, 14 Apr 2022 14:36:03 -0600 Yu Zhao <yuzhao at google.com> wrote:
> >
> > > > or it is only something
> > > > meaningful for the internal code?
> > >
> > > This is how swappiness is interpreted.
> > >
> > > > if so, can we rename it to
> > > > something else? otherwise, it is quite confusing.
> > >
> > > Feel free to suggest something.
> >
> > It is confusing,   swap_preference?
>
> seems to be much better. might also be worth using MACRO to replace those
> 1, 200, 0 magic numbers  to tell readers the exact meaning?

How do you read "swap_preference=0"?

I read it as "no (swap) preference", which means anon and file are
equal. The real meaning though, is "don't swap"; and the "no
preference" value is actually 100.