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SubjectRe: [RFC 06/23] mm/memblock: Add memblock early memory allocation apis
On Sunday 13 October 2013 02:42 PM, Tejun Heo wrote:
> On Sun, Oct 13, 2013 at 07:00:59PM +0100, Russell King - ARM Linux wrote:
>> On Sun, Oct 13, 2013 at 01:56:48PM -0400, Tejun Heo wrote:
>>> Hello,
>>> On Sat, Oct 12, 2013 at 05:58:49PM -0400, Santosh Shilimkar wrote:
>>>> Introduce memblock early memory allocation APIs which allow to support
>>>> LPAE extension on 32 bits archs. More over, this is the next step
>>> LPAE isn't something people outside arm circle would understand.
>>> Let's stick to highmem.
>> LPAE != highmem. Two totally different things, unless you believe
>> system memory always starts at physical address zero, which is very
>> far from the case on the majority of ARM platforms.
thanks Russell for clarification.

>> So replacing LPAE with "highmem" is pure misrepresentation and is
>> inaccurate. PAE might be a better term, and is also the x86 term
>> for this.
> Ah, right, forgot about the base address. Let's please spell out the
> requirements then. Briefly explaining both aspects (non-zero base
> addr & highmem) and why the existing bootmem based interfaced can't
> serve them would be helpful to later readers.
OK. Will try to describe bit more in the next version.Cover letter had
some of the information on the requirement which I will also
mention in the patch commit in next version.


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