Re: Preliminary kexec support for Linux/m68k

Re: Preliminary kexec support for Linux/m68k

[Geert Uytterhoeven]

On Tue, Sep 17, 2013 at 12:01 PM, Geert Uytterhoeven
<geert@linux-m68k.org> wrote:
> This is a preliminary set of patches to add kexec support for m68k.

>   - [PATCH 1/3] m68k: Add preliminary kexec support
>   - [PATCH 2/3] m68k: Add support to export bootinfo in procfs
>   - [PATCH 3/3] [RFC] m68k: Add System RAM to /proc/iomem
>
> Notes:
>   - The bootinfo is now saved and exported to /proc/bootinfo, so kexec-tools
>     can read it and pass it (possibly after modification) to the new kernel.
>     This is similar to /proc/atags on ARM.

>   - I based [PATCH 3/3] on the PowerPC version, but it's no longer needed as we
>     now get this information from the bootinfo.
>     Does anyone think this is nice to have anyway?

It seems kexec/kdump on ppc don't use /proc/iomem anymore, and only rely on
/proc/device-tree these days?

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

Re: Preliminary kexec support for Linux/m68k

[Simon Horman]

On Thu, Sep 19, 2013 at 11:20:22AM +0200, Geert Uytterhoeven wrote:
> On Tue, Sep 17, 2013 at 12:01 PM, Geert Uytterhoeven
> <geert@linux-m68k.org> wrote:
> > This is a preliminary set of patches to add kexec support for m68k.
> 
> >   - [PATCH 1/3] m68k: Add preliminary kexec support
> >   - [PATCH 2/3] m68k: Add support to export bootinfo in procfs
> >   - [PATCH 3/3] [RFC] m68k: Add System RAM to /proc/iomem
> >
> > Notes:
> >   - The bootinfo is now saved and exported to /proc/bootinfo, so kexec-tools
> >     can read it and pass it (possibly after modification) to the new kernel.
> >     This is similar to /proc/atags on ARM.
> 
> >   - I based [PATCH 3/3] on the PowerPC version, but it's no longer needed as we
> >     now get this information from the bootinfo.
> >     Does anyone think this is nice to have anyway?
> 
> It seems kexec/kdump on ppc don't use /proc/iomem anymore, and only rely on
> /proc/device-tree these days?

I think thats entirely a matter for the m68k kernel maintainers to decide.
But my personal opinion is that it is nice not to add it if it isn't needed.