free -m命令得到这个结果：
total used free shared buff/cache available
Mem: 7653 1569 296 53 5787 5680
Swap: 16677 0 16677
/proc/meminfo/得到这个：
MemTotal: 7836716 kB
MemFree: 247608 kB
MemAvailable: 5761416 kB
Buffers: 213056 kB
Cached: 5428304 kB
SwapCached: 0 kB
Active: 2382164 kB
Inactive: 4671292 kB
Active(anon): 1354928 kB
Inactive(anon): 112176 kB
Active(file): 1027236 kB
Inactive(file): 4559116 kB
nevictable: 48 kB
Mlocked: 48 kB
SwapTotal: 17078268 kB
SwapFree: 17078268 kB
Dirty: 6876 kB
Writeback: 0 kB
AnonPages: 1412180 kB
Mapped: 523672 kB
Shmem: 55008 kB
Slab: 285340 kB
SReclaimable: 232240 kB
SUnreclaim: 53100 kB
KernelStack: 9536 kB
PageTables: 38648 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 20996624 kB
Committed_AS: 6131060 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 0 kB
VmallocChunk: 0 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
ShmemHugePages: 0 kB
ShmemPmdMapped: 0 kB
CmaTotal: 0 kB
CmaFree: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 282236 kB
DirectMap2M: 4626432 kB
DirectMap1G: 3145728 kB
那么 Intel 芯片组的共享内存是 55008 kB（来自 Shmem 行）？共享内存是从交换中获取的，那么如何更改共享内存的大小？
我发现在 BIOS 中您可以配置（从而也可以看到）共享了多少个 RAM。