Re: [PATCH 0/2] ARM: Allow either FLATMEM or SPARSEMEM on the multiplatform build

[Geert Uytterhoeven <geert@linux-m68k.org>]

Hi Russell,

On Thu, May 21, 2020 at 4:50 PM Russell King - ARM Linux admin
<linux@armlinux.org.uk> wrote:
> On Thu, May 21, 2020 at 05:07:45PM +0300, Mike Rapoport wrote:
> > Ah, when either of these patforms will become a part of the
> > multiplatform build, the only option for multiplatform build will be
> > sparsemem.
> > So it would be nice if somebody could check the cost of using sparsemem
> > vs flatmem, espessially on low end machines.
>
> Do you think they will become part of multiplatform?
>
> If they're low-end machines, then adding:
>
> (a) the additional memory overhead of a multiplatform kernel
> (b) the additional runtime overhead of the complexities of multiplatform
>     kernels
>
> is surely an odd thing to do, especially when few really care about
> these platforms becoming part of a multiplatform kernel, except those
> who like the idea of multiplat.

The fallacy of "multi-platform", again?

Isn't it a requirement for any new ARM v7-A platforms to be part of
ARCH_MULTI_V7, even if it's a low-end machine?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

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