Hi Wanpeng
On 08/28/2013 04:03 PM, Wanpeng Li wrote:
Hi Tang,
......
[About this patch-set]
So this patch-set does the following:
1. Make memblock be able to allocate memory from low address to high address.
I want to know if there is fragmentation degree difference here?
Before this patch-set, we mapped memory like this:
1. [0, ISA_END_ADDRESS),
2. [ISA_END_ADDRESS, round_down(max_addr, PMD_SIZE)), from top downwards,
3. [round_down(max_addr, PMD_SIZE), max_addr)
After this patch-set, when movablenode is enabled, it is like:
1. [round_up(_end, PMD_SIZE), max_addr), from _end upwards,
2. [ISA_END_ADDRESS, round_up(_end, PMD_SIZE)),
3. [0, ISA_END_ADDRESS)
All the boundaries are aligned with PMD_SIZE. I think it is the same.
Thanks.
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