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The meaning of / proc/meminfo in Linux

Embedded development is sensitive to memory leaks and pays more attention to the location of leaks. This article records the meaning of the parameters of / proc/meminfo collected from the Internet. It's not complete yet. It needs to be made up.

Reference

Understanding of / proc/meminfo

Linux/Documentation/filesystems/proc.txt

Description

The following items are not available on every Linux system, and depending on your Linux design and version, there may be more or less items.

The second item in Resources is the latest Linux documentation

The project name describes all available RAM sizes for MemTotal, physical memory minus reserved bits, and the buffer size of Cached files (file system metadata, tracking in-flight pages) that the kernel uses MemFreeLowFree + HighFreeBuffers to cache for block devices. SwapCached has been swapped out of memory. Memory associated with Active frequently (recently) used Inactive memory that has not been used frequently recently. This can easily be moved by the system to do all the space above 860MB (0x35C00000) using Active (anon)? Inactive (anon)? Unevictable?Mlocked?HighTotal. Mainly the space below the user space program or cache page LowTotal860MB. If the space is used up, the system may exception the free space above HighFree860MB, the total free space below LowFree860MB, the sum of free space SwapTotal swap space temporarily stored in Swap, the size of data waiting to be written back, Dirty, the data size being written back, Mapped mapping file size, AnonPages mapping to user space, non-file page table size, Shmem?Slab kernel data structure, part of the cache SReclaimableSlab. When the memory pressure is high, the memory space of the SlabKernelStack?PageTables bottom page table that can reclaimSUnreclaim but cannot reclaim has been sent to the NFS server but has not been committed written to the stable storage page table Bonce?WritebackTmpMemory used by FUSE for temporary writeback buffersCommitLimitCommitLimit = ('vm.overcommit_ratio' * Physical RAM) Committed_ASThe amount of memory presently allocated on the system. (currently allocated memory in the system? VmallocTotalvmalloc memory size VmallocUsed used virtual memory size VmallocChunk the largest contiguous memory block available in the vmalloc area is above the size of the article "what does / proc/meminfo in Linux mean?" Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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