Badari Pulavarty writes:

I am trying to get hotplug memory remove working on ppc64.
In order to verify a given memory region, if its valid or not -
current hotplug-memory patches used /proc/iomem. On IA64 and
x86-64 /proc/iomem shows all memory regions. 

I am wondering, if its acceptable to do the same on ppc64 also ?

I am a bit hesitant to do that, since /proc/iomem is user visible and
is therefore part of the user/kernel ABI.  Also it feels a bit weird
to have system RAM in something whose name suggests it's about MMIO.

Otherwise, we need to add arch-specific hooks in hotplug-remove
code to be able to do this.

Isn't it just a matter of abstracting the test for a valid range of
memory?  If it's really hard to abstract that, then I guess we can put
RAM in iomem_resource, but I'd rather not.

Thanks,
Paul.