Entry in /proc/meminfo

Question

I am now study linux. cat /proc/meminfo produces as following. Please tell me the mean of entry \"Active(file)/Inactive(file)\". I can\'t find the explanation of these entry

Answer 1

And FYI.

1. Active = Active(anon) + Active(file) Inactive = Inactive(anon) + Inactive(file)
2. Active(file), Inactive(file) has file back-end which means its original file is in disk but to use it faster it was loaded on RAM.
3. Active(file) + Inactive(file) + Shmem = Cached + Buffer + SwapCached