Re: [PATCH part5 0/7] Arrange hotpluggable memory as ZONE_MOVABLE.

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On 08/12/2013 02:08 PM, Tejun Heo wrote:
> On Mon, Aug 12, 2013 at 02:06:07PM -0700, Yinghai Lu wrote:
>> "near kernel" is not very clear. when we have 64bit boot loader,
>> kernel could be anywhere. If the kernel is near the end of first
>> kernel, we could have chance to
>> have near kernel on second node.
>>
>> should use BRK for safe if the buffer is not too big. need bootloader
>> will have kernel run-time size range in same node ram.
> 
> How would that make any difference?  You're just expanding the size of
> kernel image instead of reserving it around the image.  It's exactly
> the same thing.  You're just less flexible if you do that with BRK.
> What am I missing here?
> 

The BRK is what we know is free.  Beyond that point you need
understanding of the memory map.

	-hpa

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