From: Anton Blanchard <anton@samba.org>

Distribute boot time memory allocations across all nodes, from Manfred
Spraul.

We want to spread memory across nodes to avoid all allocations ending
up on node 0.

Spreading boot time allocations around also helps us to avoid node 0
becoming the hot node.

I took it for a spin:

buddyinfo before:
Node 7, 0    2    1    1    0    2    1    2    1    2    1    2    741
Node 6, 0    0    0    2    0    2    1    1    2    2    2    2   1002
Node 5, 0    0    0    2    0    2    1    2    1    2    2    2   2006
Node 4, 0    0    0    2    0    2    1    2    1    2    2    2   2006
Node 3, 0    0    0    2    0    2    1    2    1    2    2    2   2006
Node 2, 0    0    0    2    0    2    1    2    1    2    2    2   2006
Node 1, 0    0    0    2    0    2    1    1    2    2    2    2   1002
Node 0, 0    0   38    7    0    1    1    1    0    0    0    0   1998

buddyinfo after:
Node 7, 0    1    0    1    1    1    1    0    0    0    1    2    738
Node 6, 0    1    0    1    1    1    0    1    0    0    2    2   1002
Node 5, 0    0    0    1    1    1    1    0    0    0    2    2   2006
Node 4, 0    1    0    1    0    1    1    0    0    0    2    2   2006
Node 3, 0    0    0    1    0    1    1    0    0    0    2    2   2005
Node 2, 0    1    0    0    0    0    0    1    0    0    2    2   2006
Node 1, 0    2    1    1    0    1    1    1    0    0    2    2   1002
Node 0, 0   20   45    8    3    0    1    1    1    1    0    1   2004

Change in free memory due to patch:

Node 7 -54.08 MB
Node 6  -6.33 MB
Node 5  -6.09 MB
Node 4  -6.14 MB
Node 3 -22.15 MB
Node 2  -6.05 MB
Node 1  -6.12 MB
Node 0 107.35 MB

As you can see we gained over 100MB on node 0.