PROC_MEMINFO(5) (NAME) /proc/meminfo - (RAM) (DESCRIPTION) /proc/meminfo / free(1) . . free(1) ( swap) . ( "kB") . (format specifier) . 2.6.0 . . MemTotal %lu (RAM) ( ). MemFree %lu LowFree + HighFree. MemAvailable %lu ( 3.14) (swapping). Buffers %lu ( ). Cached %lu ( page cache). SwapCached . SwapCached %lu (swapped out) (swapped in) swap . ( swap / ). Active %lu (reclaim) . Inactive %lu . . Active(anon) %lu ( 2.6.28) (anonymous) . Inactive(anon) %lu ( 2.6.28) (swap) . Active(file) %lu ( 2.6.28) (file-backed) () . Inactive(file) %lu ( 2.6.28) . Unevictable %lu ( 2.6.28) . ( 2.6.28 2.6.30 CONFIG_UNEVICTABLE_LRU ). Mlocked %lu ( 2.6.28) mlock . ( 2.6.28 2.6.30 CONFIG_UNEVICTABLE_LRU ). HighTotal %lu ( 2.6.19 CONFIG_HIGHMEM .) (Highmem). Highmem . Highmem . Lowmem . HighFree %lu ( 2.6.19 CONFIG_HIGHMEM .) . LowTotal %lu ( 2.6.19 CONFIG_HIGHMEM .) (Lowmem). Lowmem Highmem . Slab . Lowmem . LowFree %lu ( 2.6.19 CONFIG_HIGHMEM .) . MmapCopy %lu ( 2.6.29) (CONFIG_MMU .) mmap (MMU). SwapTotal %lu (Swap) . SwapFree %lu . Dirty %lu . Writeback %lu . AnonPages %lu ( 2.6.18) () . Mapped %lu mmap(2) . Shmem %lu ( 2.6.32) tmpfs(5). KReclaimable %lu ( 4.20) . SReclaimable ( ) shrinker . Slab %lu . ( slabinfo(5) ). SReclaimable %lu ( 2.6.19) Slab (dentries inodes). SUnreclaim %lu ( 2.6.19) Slab . KernelStack %lu ( 2.6.32) (Kernel Stacks). PageTables %lu ( 2.6.18) (Page Tables). Quicklists %lu ( 2.6.27) (CONFIG_QUICKLIST .) . NFS_Unstable %lu ( 2.6.18) NFS . Bounce %lu ( 2.6.18) (bounce buffers) . WritebackTmp %lu ( 2.6.26) FUSE . CommitLimit %lu ( 2.6.10) . overcommit ( /proc/sys/vm/overcommit_memory). /proc/sys/vm/overcommit_memory . Documentation/vm/overcommit-accounting.rst . Committed_AS %lu . (Committed memory) "" . ( malloc(3) ) . VM "" . overcommit ( /proc/sys/vm/overcommit_memory) CommitLimit . . VmallocTotal %lu vmalloc. VmallocUsed %lu vmalloc. 4.4 0 . /proc/vmallocinfo . VmallocChunk %lu vmalloc. 4.4 0 . /proc/vmallocinfo . HardwareCorrupted %lu ( 2.6.32) (CONFIG_MEMORY_FAILURE .) . LazyFree %lu ( 4.12) madvise(2) MADV_FREE . AnonHugePages %lu ( 2.6.38) (CONFIG_TRANSPARENT_HUGEPAGE .) ( ) . ShmemHugePages %lu ( 4.8) (CONFIG_TRANSPARENT_HUGEPAGE .) (shmem) tmpfs(5) . ShmemPmdMapped %lu ( 4.8) (CONFIG_TRANSPARENT_HUGEPAGE .) . CmaTotal %lu ( 3.1) (CMA). (CONFIG_CMA .) CmaFree %lu ( 3.1) (CMA). (CONFIG_CMA .) HugePages_Total %lu (CONFIG_HUGETLB_PAGE .) (pool) . HugePages_Free %lu (CONFIG_HUGETLB_PAGE .) . HugePages_Rsvd %lu ( 2.6.17) (CONFIG_HUGETLB_PAGE .) . (fault time) . HugePages_Surp %lu ( 2.6.24) (CONFIG_HUGETLB_PAGE .) /proc/sys/vm/nr_hugepages. /proc/sys/vm/nr_overcommit_hugepages . Hugepagesize %lu (CONFIG_HUGETLB_PAGE .) (Huge Page). DirectMap4k %lu ( 2.6.27) . ( x86). DirectMap4M %lu ( 2.6.27) . ( x86 CONFIG_X86_64 CONFIG_X86_PAE). DirectMap2M %lu ( 2.6.27) . ( x86 CONFIG_X86_64 CONFIG_X86_PAE ). DirectMap1G %lu ( 2.6.27) ( x86 CONFIG_X86_64 CONFIG_X86_DIRECT_GBPAGES). (SEE ALSO) proc(5) man-pages PROC_MEMINFO(5)