查看内存信息常用命令：
console:/ # cat /proc/cmdline ...... console:/ # cat /proc/buddyinfo //描述了每个zone中对应于每个阶的空闲内存页块的数目，从左到右阶数依次升高。 Node 0, zone DMA32 581 210 97 46 17 5 4 3 9 5 119 console:/ # cat /proc/pagetypeinfo Page block order: 10 Pages per block: 1024 Free pages count per migrate type at order 0 1 2 3 4 5 6 7 8 9 10 Node 0, zone DMA32, type Unmovable 23 5 11 12 12 10 4 5 3 1 0 Node 0, zone DMA32, type Movable 100 91 11 7 12 9 6 5 9 7 107 Node 0, zone DMA32, type Reclaimable 33 1 0 0 0 0 1 1 1 1 0 Node 0, zone DMA32, type CMA 14 1 0 0 1 1 1 1 1 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 Number of blocks type Unmovable Movable Reclaimable CMA HighAtomic Isolate Node 0, zone DMA32 259 198 12 6 0 0 console:/ # console:/ # cat /proc/meminfo MemTotal: 1886676 kB MemFree: 486588 kB MemAvailable: 1201768 kB Buffers: 31048 kB Cached: 665252 kB SwapCached: 0 kB Active: 474260 kB Inactive: 519408 kB Active(anon): 299704 kB Inactive(anon): 2804 kB Active(file): 174556 kB Inactive(file): 516604 kB Unevictable: 2640 kB Mlocked: 2640 kB SwapTotal: 511996 kB SwapFree: 511996 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 300004 kB Mapped: 404656 kB Shmem: 3092 kB KReclaimable: 79880 kB Slab: 108496 kB SReclaimable: 45080 kB SUnreclaim: 63416 kB KernelStack: 21792 kB PageTables: 34804 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 1455332 kB Committed_AS: 27662588 kB VmallocTotal: 263061440 kB VmallocUsed: 84240 kB VmallocChunk: 0 kB Percpu: 1040 kB CmaTotal: 24576 kB CmaFree: 2048 kB console:/ #