Re: [PATCH] Kconfig: CONFIG_UNEVICTABLE_LRU move into EMBEDDED submenu

Minchan Kim
2009-05-13T10:12:26Z

On Wed, 13 May 2009 17:59:34 +0900 (JST)
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> wrote:

> > Hi, Kosaki.
> >
> > On Wed, 13 May 2009 17:30:45 +0900 (JST)
> > KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> wrote:
> >
> > > Subject: [PATCH] Kconfig: CONFIG_UNEVICTABLE_LRU move into EMBEDDED submenu
> > >
> > > Almost people always turn on CONFIG_UNEVICTABLE_LRU. this configuration is
> > > used only embedded people.
> >
> > I think at least embedded guys don't need it.
> > But I am not sure other guys.
>
> perhaps, I and you live in another embedded world.

Each people always have a different viewpoint.
:)

>
> > > +config UNEVICTABLE_LRU
> > > + bool "Add LRU list to track non-evictable pages" if EMBEDDED
> > > + default y
> >
> > If you want to move, it would be better as following.
> >
> > config UNEVICTABLE_LRU
> > bool "Add LRU list to track non-evictable pages" if EMBEDDED
> > default !EMBEDDED
>
> No.
> As far as I know, many embedded guys use this configuration.
> they hate unexpected latency by reclaim. !UNEVICTABLE_LRU increase
> unexpectability largely.

As I said previous(http://lkml.org/lkml/2009/3/16/209), Many embedded environment have a small ram. It doesn't have a big impact in such case.

Let CCed embedded matainers.
I won't have a objection if embedded maintainers ack this.

Thanks for your effort for embdded.

--
Kinds Regards
Minchan Kim