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diff --git a/man5/proc_meminfo.5 b/man5/proc_meminfo.5 deleted file mode 100644 index 7a2e70e..0000000 --- a/man5/proc_meminfo.5 +++ /dev/null @@ -1,327 +0,0 @@ -.\" Copyright (C) 1994, 1995, Daniel Quinlan <quinlan@yggdrasil.com> -.\" Copyright (C) 2002-2008, 2017, Michael Kerrisk <mtk.manpages@gmail.com> -.\" Copyright (C) 2023, Alejandro Colomar <alx@kernel.org> -.\" -.\" SPDX-License-Identifier: GPL-3.0-or-later -.\" -.TH proc_meminfo 5 2023-08-15 "Linux man-pages 6.7" -.SH NAME -/proc/meminfo \- memory usage -.SH DESCRIPTION -.TP -.I /proc/meminfo -This file reports statistics about memory usage on the system. -It is used by -.BR free (1) -to report the amount of free and used memory (both physical and swap) -on the system as well as the shared memory and buffers used by the -kernel. -Each line of the file consists of a parameter name, followed by a colon, -the value of the parameter, and an option unit of measurement (e.g., "kB"). -The list below describes the parameter names and -the format specifier required to read the field value. -Except as noted below, -all of the fields have been present since at least Linux 2.6.0. -Some fields are displayed only if the kernel was configured -with various options; those dependencies are noted in the list. -.RS -.TP -.IR MemTotal " %lu" -Total usable RAM (i.e., physical RAM minus a few reserved -bits and the kernel binary code). -.TP -.IR MemFree " %lu" -The sum of -.IR LowFree + HighFree . -.TP -.IR MemAvailable " %lu (since Linux 3.14)" -An estimate of how much memory is available for starting new -applications, without swapping. -.TP -.IR Buffers " %lu" -Relatively temporary storage for raw disk blocks that -shouldn't get tremendously large (20 MB or so). -.TP -.IR Cached " %lu" -In-memory cache for files read from the disk (the page cache). -Doesn't include -.IR SwapCached . -.TP -.IR SwapCached " %lu" -Memory that once was swapped out, is swapped back in but -still also is in the swap file. -(If memory pressure is high, these pages -don't need to be swapped out again because they are already -in the swap file. -This saves I/O.) -.TP -.IR Active " %lu" -Memory that has been used more recently and usually not -reclaimed unless absolutely necessary. -.TP -.IR Inactive " %lu" -Memory which has been less recently used. -It is more eligible to be reclaimed for other purposes. -.TP -.IR Active(anon) " %lu (since Linux 2.6.28)" -[To be documented.] -.TP -.IR Inactive(anon) " %lu (since Linux 2.6.28)" -[To be documented.] -.TP -.IR Active(file) " %lu (since Linux 2.6.28)" -[To be documented.] -.TP -.IR Inactive(file) " %lu (since Linux 2.6.28)" -[To be documented.] -.TP -.IR Unevictable " %lu (since Linux 2.6.28)" -(From Linux 2.6.28 to Linux 2.6.30, -\fBCONFIG_UNEVICTABLE_LRU\fP was required.) -[To be documented.] -.TP -.IR Mlocked " %lu (since Linux 2.6.28)" -(From Linux 2.6.28 to Linux 2.6.30, -\fBCONFIG_UNEVICTABLE_LRU\fP was required.) -[To be documented.] -.TP -.IR HighTotal " %lu" -(Starting with Linux 2.6.19, \fBCONFIG_HIGHMEM\fP is required.) -Total amount of highmem. -Highmem is all memory above \[ti]860 MB of physical memory. -Highmem areas are for use by user-space programs, -or for the page cache. -The kernel must use tricks to access -this memory, making it slower to access than lowmem. -.TP -.IR HighFree " %lu" -(Starting with Linux 2.6.19, \fBCONFIG_HIGHMEM\fP is required.) -Amount of free highmem. -.TP -.IR LowTotal " %lu" -(Starting with Linux 2.6.19, \fBCONFIG_HIGHMEM\fP is required.) -Total amount of lowmem. -Lowmem is memory which can be used for everything that -highmem can be used for, but it is also available for the -kernel's use for its own data structures. -Among many other things, -it is where everything from -.I Slab -is allocated. -Bad things happen when you're out of lowmem. -.TP -.IR LowFree " %lu" -(Starting with Linux 2.6.19, \fBCONFIG_HIGHMEM\fP is required.) -Amount of free lowmem. -.TP -.IR MmapCopy " %lu (since Linux 2.6.29)" -.RB ( CONFIG_MMU -is required.) -[To be documented.] -.TP -.IR SwapTotal " %lu" -Total amount of swap space available. -.TP -.IR SwapFree " %lu" -Amount of swap space that is currently unused. -.TP -.IR Dirty " %lu" -Memory which is waiting to get written back to the disk. -.TP -.IR Writeback " %lu" -Memory which is actively being written back to the disk. -.TP -.IR AnonPages " %lu (since Linux 2.6.18)" -Non-file backed pages mapped into user-space page tables. -.TP -.IR Mapped " %lu" -Files which have been mapped into memory (with -.BR mmap (2)), -such as libraries. -.TP -.IR Shmem " %lu (since Linux 2.6.32)" -Amount of memory consumed in -.BR tmpfs (5) -filesystems. -.TP -.IR KReclaimable " %lu (since Linux 4.20)" -Kernel allocations that the kernel will attempt to reclaim -under memory pressure. -Includes -.I SReclaimable -(below), and other direct allocations with a shrinker. -.TP -.IR Slab " %lu" -In-kernel data structures cache. -(See -.BR slabinfo (5).) -.TP -.IR SReclaimable " %lu (since Linux 2.6.19)" -Part of -.IR Slab , -that might be reclaimed, such as caches. -.TP -.IR SUnreclaim " %lu (since Linux 2.6.19)" -Part of -.IR Slab , -that cannot be reclaimed on memory pressure. -.TP -.IR KernelStack " %lu (since Linux 2.6.32)" -Amount of memory allocated to kernel stacks. -.TP -.IR PageTables " %lu (since Linux 2.6.18)" -Amount of memory dedicated to the lowest level of page tables. -.TP -.IR Quicklists " %lu (since Linux 2.6.27)" -(\fBCONFIG_QUICKLIST\fP is required.) -[To be documented.] -.TP -.IR NFS_Unstable " %lu (since Linux 2.6.18)" -NFS pages sent to the server, but not yet committed to stable storage. -.TP -.IR Bounce " %lu (since Linux 2.6.18)" -Memory used for block device "bounce buffers". -.TP -.IR WritebackTmp " %lu (since Linux 2.6.26)" -Memory used by FUSE for temporary writeback buffers. -.TP -.IR CommitLimit " %lu (since Linux 2.6.10)" -This is the total amount of memory currently available to -be allocated on the system, expressed in kilobytes. -This limit is adhered to -only if strict overcommit accounting is enabled (mode 2 in -.IR /proc/sys/vm/overcommit_memory ). -The limit is calculated according to the formula described under -.IR /proc/sys/vm/overcommit_memory . -For further details, see the kernel source file -.IR Documentation/vm/overcommit\-accounting.rst . -.TP -.IR Committed_AS " %lu" -The amount of memory presently allocated on the system. -The committed memory is a sum of all of the memory which -has been allocated by processes, even if it has not been -"used" by them as of yet. -A process which allocates 1 GB of memory (using -.BR malloc (3) -or similar), but touches only 300 MB of that memory will show up -as using only 300 MB of memory even if it has the address space -allocated for the entire 1 GB. -.IP -This 1 GB is memory which has been "committed" to by the VM -and can be used at any time by the allocating application. -With strict overcommit enabled on the system (mode 2 in -.IR /proc/sys/vm/overcommit_memory ), -allocations which would exceed the -.I CommitLimit -will not be permitted. -This is useful if one needs to guarantee that processes will not -fail due to lack of memory once that memory has been successfully allocated. -.TP -.IR VmallocTotal " %lu" -Total size of vmalloc memory area. -.TP -.IR VmallocUsed " %lu" -Amount of vmalloc area which is used. -Since Linux 4.4, -.\" commit a5ad88ce8c7fae7ddc72ee49a11a75aa837788e0 -this field is no longer calculated, and is hard coded as 0. -See -.IR /proc/vmallocinfo . -.TP -.IR VmallocChunk " %lu" -Largest contiguous block of vmalloc area which is free. -Since Linux 4.4, -.\" commit a5ad88ce8c7fae7ddc72ee49a11a75aa837788e0 -this field is no longer calculated and is hard coded as 0. -See -.IR /proc/vmallocinfo . -.TP -.IR HardwareCorrupted " %lu (since Linux 2.6.32)" -(\fBCONFIG_MEMORY_FAILURE\fP is required.) -[To be documented.] -.TP -.IR LazyFree " %lu (since Linux 4.12)" -Shows the amount of memory marked by -.BR madvise (2) -.BR MADV_FREE . -.TP -.IR AnonHugePages " %lu (since Linux 2.6.38)" -(\fBCONFIG_TRANSPARENT_HUGEPAGE\fP is required.) -Non-file backed huge pages mapped into user-space page tables. -.TP -.IR ShmemHugePages " %lu (since Linux 4.8)" -(\fBCONFIG_TRANSPARENT_HUGEPAGE\fP is required.) -Memory used by shared memory (shmem) and -.BR tmpfs (5) -allocated with huge pages. -.TP -.IR ShmemPmdMapped " %lu (since Linux 4.8)" -(\fBCONFIG_TRANSPARENT_HUGEPAGE\fP is required.) -Shared memory mapped into user space with huge pages. -.TP -.IR CmaTotal " %lu (since Linux 3.1)" -Total CMA (Contiguous Memory Allocator) pages. -(\fBCONFIG_CMA\fP is required.) -.TP -.IR CmaFree " %lu (since Linux 3.1)" -Free CMA (Contiguous Memory Allocator) pages. -(\fBCONFIG_CMA\fP is required.) -.TP -.IR HugePages_Total " %lu" -(\fBCONFIG_HUGETLB_PAGE\fP is required.) -The size of the pool of huge pages. -.TP -.IR HugePages_Free " %lu" -(\fBCONFIG_HUGETLB_PAGE\fP is required.) -The number of huge pages in the pool that are not yet allocated. -.TP -.IR HugePages_Rsvd " %lu (since Linux 2.6.17)" -(\fBCONFIG_HUGETLB_PAGE\fP is required.) -This is the number of huge pages for -which a commitment to allocate from the pool has been made, -but no allocation has yet been made. -These reserved huge pages -guarantee that an application will be able to allocate a -huge page from the pool of huge pages at fault time. -.TP -.IR HugePages_Surp " %lu (since Linux 2.6.24)" -(\fBCONFIG_HUGETLB_PAGE\fP is required.) -This is the number of huge pages in -the pool above the value in -.IR /proc/sys/vm/nr_hugepages . -The maximum number of surplus huge pages is controlled by -.IR /proc/sys/vm/nr_overcommit_hugepages . -.TP -.IR Hugepagesize " %lu" -(\fBCONFIG_HUGETLB_PAGE\fP is required.) -The size of huge pages. -.TP -.IR DirectMap4k " %lu (since Linux 2.6.27)" -Number of bytes of RAM linearly mapped by kernel in 4 kB pages. -(x86.) -.TP -.IR DirectMap4M " %lu (since Linux 2.6.27)" -Number of bytes of RAM linearly mapped by kernel in 4 MB pages. -(x86 with -.B CONFIG_X86_64 -or -.B CONFIG_X86_PAE -enabled.) -.TP -.IR DirectMap2M " %lu (since Linux 2.6.27)" -Number of bytes of RAM linearly mapped by kernel in 2 MB pages. -(x86 with neither -.B CONFIG_X86_64 -nor -.B CONFIG_X86_PAE -enabled.) -.TP -.IR DirectMap1G " %lu (since Linux 2.6.27)" -(x86 with -.B CONFIG_X86_64 -and -.B CONFIG_X86_DIRECT_GBPAGES -enabled.) -.RE -.SH SEE ALSO -.BR proc (5) |