tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/fs.h>
3#include <linux/init.h>
4#include <linux/kernel.h>
5#include <linux/mm.h>
6#include <linux/hugetlb.h>
7#include <linux/mman.h>
8#include <linux/mmzone.h>
9#include <linux/proc_fs.h>
10#include <linux/percpu.h>
11#include <linux/seq_file.h>
12#include <linux/swap.h>
13#include <linux/vmstat.h>
14#include <linux/atomic.h>
15#include <linux/vmalloc.h>
16#ifdef CONFIG_CMA
17#include <linux/cma.h>
18#endif
19#include <asm/page.h>
20#include <asm/pgtable.h>
21#include "internal.h"
22
23void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
24{
25}
26
27static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
28{
29 seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8);
30 seq_write(m, " kB\n", 4);
31}
32
33static int meminfo_proc_show(struct seq_file *m, void *v)
34{
35 struct sysinfo i;
36 unsigned long committed;
37 long cached;
38 long available;
39 unsigned long pages[NR_LRU_LISTS];
40 unsigned long sreclaimable, sunreclaim;
41 int lru;
42
43 si_meminfo(&i);
44 si_swapinfo(&i);
45 committed = percpu_counter_read_positive(&vm_committed_as);
46
47 cached = global_node_page_state(NR_FILE_PAGES) -
48 total_swapcache_pages() - i.bufferram;
49 if (cached < 0)
50 cached = 0;
51
52 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
53 pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
54
55 available = si_mem_available();
56 sreclaimable = global_node_page_state(NR_SLAB_RECLAIMABLE);
57 sunreclaim = global_node_page_state(NR_SLAB_UNRECLAIMABLE);
58
59 show_val_kb(m, "MemTotal: ", i.totalram);
60 show_val_kb(m, "MemFree: ", i.freeram);
61 show_val_kb(m, "MemAvailable: ", available);
62 show_val_kb(m, "Buffers: ", i.bufferram);
63 show_val_kb(m, "Cached: ", cached);
64 show_val_kb(m, "SwapCached: ", total_swapcache_pages());
65 show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] +
66 pages[LRU_ACTIVE_FILE]);
67 show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] +
68 pages[LRU_INACTIVE_FILE]);
69 show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]);
70 show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
71 show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]);
72 show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
73 show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]);
74 show_val_kb(m, "Mlocked: ", global_zone_page_state(NR_MLOCK));
75
76#ifdef CONFIG_HIGHMEM
77 show_val_kb(m, "HighTotal: ", i.totalhigh);
78 show_val_kb(m, "HighFree: ", i.freehigh);
79 show_val_kb(m, "LowTotal: ", i.totalram - i.totalhigh);
80 show_val_kb(m, "LowFree: ", i.freeram - i.freehigh);
81#endif
82
83#ifndef CONFIG_MMU
84 show_val_kb(m, "MmapCopy: ",
85 (unsigned long)atomic_long_read(&mmap_pages_allocated));
86#endif
87
88 show_val_kb(m, "SwapTotal: ", i.totalswap);
89 show_val_kb(m, "SwapFree: ", i.freeswap);
90 show_val_kb(m, "Dirty: ",
91 global_node_page_state(NR_FILE_DIRTY));
92 show_val_kb(m, "Writeback: ",
93 global_node_page_state(NR_WRITEBACK));
94 show_val_kb(m, "AnonPages: ",
95 global_node_page_state(NR_ANON_MAPPED));
96 show_val_kb(m, "Mapped: ",
97 global_node_page_state(NR_FILE_MAPPED));
98 show_val_kb(m, "Shmem: ", i.sharedram);
99 show_val_kb(m, "KReclaimable: ", sreclaimable +
100 global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
101 show_val_kb(m, "Slab: ", sreclaimable + sunreclaim);
102 show_val_kb(m, "SReclaimable: ", sreclaimable);
103 show_val_kb(m, "SUnreclaim: ", sunreclaim);
104 seq_printf(m, "KernelStack: %8lu kB\n",
105 global_zone_page_state(NR_KERNEL_STACK_KB));
106 show_val_kb(m, "PageTables: ",
107 global_zone_page_state(NR_PAGETABLE));
108
109 show_val_kb(m, "NFS_Unstable: ",
110 global_node_page_state(NR_UNSTABLE_NFS));
111 show_val_kb(m, "Bounce: ",
112 global_zone_page_state(NR_BOUNCE));
113 show_val_kb(m, "WritebackTmp: ",
114 global_node_page_state(NR_WRITEBACK_TEMP));
115 show_val_kb(m, "CommitLimit: ", vm_commit_limit());
116 show_val_kb(m, "Committed_AS: ", committed);
117 seq_printf(m, "VmallocTotal: %8lu kB\n",
118 (unsigned long)VMALLOC_TOTAL >> 10);
119 show_val_kb(m, "VmallocUsed: ", vmalloc_nr_pages());
120 show_val_kb(m, "VmallocChunk: ", 0ul);
121 show_val_kb(m, "Percpu: ", pcpu_nr_pages());
122
123#ifdef CONFIG_MEMORY_FAILURE
124 seq_printf(m, "HardwareCorrupted: %5lu kB\n",
125 atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
126#endif
127
128#ifdef CONFIG_TRANSPARENT_HUGEPAGE
129 show_val_kb(m, "AnonHugePages: ",
130 global_node_page_state(NR_ANON_THPS) * HPAGE_PMD_NR);
131 show_val_kb(m, "ShmemHugePages: ",
132 global_node_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR);
133 show_val_kb(m, "ShmemPmdMapped: ",
134 global_node_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR);
135 show_val_kb(m, "FileHugePages: ",
136 global_node_page_state(NR_FILE_THPS) * HPAGE_PMD_NR);
137 show_val_kb(m, "FilePmdMapped: ",
138 global_node_page_state(NR_FILE_PMDMAPPED) * HPAGE_PMD_NR);
139#endif
140
141#ifdef CONFIG_CMA
142 show_val_kb(m, "CmaTotal: ", totalcma_pages);
143 show_val_kb(m, "CmaFree: ",
144 global_zone_page_state(NR_FREE_CMA_PAGES));
145#endif
146
147 hugetlb_report_meminfo(m);
148
149 arch_report_meminfo(m);
150
151 return 0;
152}
153
154static int __init proc_meminfo_init(void)
155{
156 proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
157 return 0;
158}
159fs_initcall(proc_meminfo_init);