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From: Benjamin Herrenschmidt on 29 Mar 2010 17:50
On Mon, 2010-03-29 at 12:11 -0700, David Miller wrote:
> From: Yinghai Lu <yinghai(a)kernel.org>
> Date: Mon, 29 Mar 2010 11:39:52 -0700
>
> > On 03/29/2010 11:34 AM, David Miller wrote:
> >> From: Yinghai Lu <yinghai(a)kernel.org>
> >> Date: Mon, 29 Mar 2010 09:20:28 -0700
> >>
> >>> BTW, it seems only PowerPC need to keep lmb after init stage, right ?
> >>
> >> For now. Sparc64 will need it at some point in the future.
> >
> > for memory hotplug support?
>
> Yes.

We also can use it to implement page_is_ram() which might help
get /dev/mem cachability setting right by default one day :-)

However, we only need to keep the memory list, not the reserve list.

Cheers,
Ben.


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