Why are there so many free movable DMA32 blocks on the x86 64bits platform?
As its name, I think it is used for DMA. But 730 free blocks(with order 10) means more than 1GB memory. How huge the memory is!
cat /proc/pagetypeinfo says:
sudo cat /proc/pagetypeinfoPage block order: 9Pages per block: 512 Free pages count per migrate type at order 0 1 2 3 4 5 6 7 8 9 10 Node 0, zone DMA, type Unmovable 0 1 1 0 2 1 1 0 1 0 0 Node 0, zone DMA, type Movable 0 0 0 0 0 0 0 0 0 1 3 Node 0, zone DMA, type Reclaimable 0 0 0 0 0 0 0 0 0 0 0 Node 0, zone DMA, type HighAtomic 0 0 0 0 0 0 0 0 0 0 0 Node 0, zone DMA, type Isolate 0 0 0 0 0 0 0 0 0 0 0 Node 0, zone DMA32, type Unmovable 1 0 0 0 0 0 1 1 1 1 0 Node 0, zone DMA32, type Movable 3 4 5 4 2 3 4 4 1 2 730 Node 0, zone DMA32, type Reclaimable 0 0 0 0 0 0 0 0 0 0 0 Node 0, zone DMA32, type HighAtomic 0 0 0 0 0 0 0 0 0 0 0 Node 0, zone DMA32, type Isolate 0 0 0 0 0 0 0 0 0 0 0 Node 0, zone Normal, type Unmovable 17 2 2 1 0 0 0 1 2 13 0 Node 0, zone Normal, type Movable 15 4 0 15 4 1 1 0 0 0 934 Node 0, zone Normal, type Reclaimable 0 6 21 9 6 3 3 1 2 0 0 Node 0, zone Normal, type HighAtomic 0 0 0 0 0 0 0 0 0 0 0 Node 0, zone Normal, type Isolate 0 0 0 0 0 0 0 0 0 0 0 Number of blocks type Unmovable Movable Reclaimable HighAtomic Isolate Node 0, zone DMA 1 7 0 0 0 Node 0, zone DMA32 2 1526 0 0 0 Node 0, zone Normal 160 2314 78 0 0
