[RFC] PPC64 Exporting memory information through /proc/iomem

[KAMEZAWA Hiroyuki]

On Wed, 03 Oct 2007 08:35:35 -0700
Badari Pulavarty <pbadari at us.ibm.com> wrote:

> On Wed, 2007-10-03 at 10:19 +0900, KAMEZAWA Hiroyuki wrote:
> CONFIG_ARCH_HAS_VALID_MEMORY_RANGE. Then define own
> find_next_system_ram() (rename to is_valid_memory_range()) - which
> checks the given range is a valid memory range for memory-remove
> or not. What do you think ?
> 
My concern is...
Now, memory hot *add* makes use of resource(/proc/iomem) information for onlining
memory.(See add_memory()->register_memory_resource() in mm/memoryhotplug.c)
So, we'll have to consider changing it if we need.

Does PPC64 memory hot add registers new memory information to arch dependent
information list ? It seems ppc64 registers hot-added memory information from
*probe* file and registers it by add_memory()->register_memory_resource().

If you add all add/remove/walk system ram information in sane way, I have no
objection.

I like find_next_system_ram() because I used some amount of time to debug it ;)

Thanks,
-Kame