set_phys_avail() futures question

Kumar Gala kumar.gala at
Thu Jun 30 15:06:38 EST 2005

On Jun 29, 2005, at 6:56 PM, Benjamin Herrenschmidt wrote:

> On Wed, 2005-06-29 at 16:14 -0500, Jon Loeliger wrote:
>> Ben (primarily),
>> I'd like to get your opinion on what the future of
>> arch/ppc/mm/init.c/set_phys_avail() looks like.
>> Currently, its job is to traverse the mem_pieces data
>> and remove a whole series of #ifdef'ed regions of
>> memory based on configuration options.  These regions
>> are the initrd, the RTAS data, and the AGP special page.
>> Do you see these regions as being explicitly listed in
>> the proposed  "reserved memory blocks" area of the Flat
>> Dev Tree header structure?
> Yes. initrd for sure, RTAS too, AGP special page well ... I have to
> check if we still use that one at all... but it's not allocated in
> prom_init so it may need it's own little bit here still.

What this implies to me is that what a flattened OF tree we will no  
longer need to call set_phys_avail().

- kumar

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