我捕获了以下 meminfo。
我不明白空闲内存是如何从 8GB 增加到几乎 25GB 的，而当时只释放了大约 4GB 的平板。获取 meminfo 输出时，进程内存消耗没有变化。
第一个具有 8GB 可用内存的 meminfo：
MemTotal: 66054256 kB
MemFree: 8344960 kB
Buffers: 1120 kB
Cached: 30172312 kB
SwapCached: 0 kB
Active: 10795428 kB
Inactive: 1914512 kB
Active(anon): 10193124 kB
Inactive(anon): 1441288 kB
Active(file): 602304 kB
Inactive(file): 473224 kB
Unevictable: 26348912 kB
Mlocked: 26348960 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 8886304 kB
Mapped: 26383052 kB
Shmem: 29097904 kB
Slab: 6006384 kB
SReclaimable: 3512404 kB
SUnreclaim: 2493980 kB
KernelStack: 15240 kB
PageTables: 78724 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 33027128 kB
Committed_AS: 44446908 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 426656 kB
VmallocChunk: 34325375716 kB
HardwareCorrupted: 0 kB
AnonHugePages: 7696384 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 6144 kB
DirectMap2M: 2058240 kB
DirectMap1G: 65011712 kB
第二次内存捕获，剩余内存接近 25GB：
MemTotal: 66054256 kB
MemFree: 24949116 kB
Buffers: 1120 kB
Cached: 29085016 kB
SwapCached: 0 kB
Active: 10168904 kB
Inactive: 1461156 kB
Active(anon): 10168216 kB
Inactive(anon): 1441956 kB
Active(file): 688 kB
Inactive(file): 19200 kB
Unevictable: 26317328 kB
Mlocked: 26317376 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 8861224 kB
Mapped: 26351488 kB
Shmem: 29066248 kB
Slab: 1503440 kB
SReclaimable: 232880 kB
SUnreclaim: 1270560 kB
KernelStack: 15256 kB
PageTables: 79664 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 33027128 kB
Committed_AS: 44418280 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 426656 kB
VmallocChunk: 34325375716 kB
HardwareCorrupted: 0 kB
AnonHugePages: 7665664 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 6144 kB
DirectMap2M: 2058240 kB
DirectMap1G: 65011712 kB