Line data Source code
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 "internal.h"
21 :
22 0 : void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
23 : {
24 0 : }
25 :
26 39 : static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
27 : {
28 39 : seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8);
29 39 : seq_write(m, " kB\n", 4);
30 39 : }
31 :
32 1 : static int meminfo_proc_show(struct seq_file *m, void *v)
33 : {
34 1 : struct sysinfo i;
35 1 : unsigned long committed;
36 1 : long cached;
37 1 : long available;
38 1 : unsigned long pages[NR_LRU_LISTS];
39 1 : unsigned long sreclaimable, sunreclaim;
40 1 : int lru;
41 :
42 1 : si_meminfo(&i);
43 1 : si_swapinfo(&i);
44 1 : committed = vm_memory_committed();
45 :
46 1 : cached = global_node_page_state(NR_FILE_PAGES) -
47 1 : total_swapcache_pages() - i.bufferram;
48 1 : if (cached < 0)
49 : cached = 0;
50 :
51 6 : for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
52 5 : pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
53 :
54 1 : available = si_mem_available();
55 1 : sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B);
56 1 : sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B);
57 :
58 1 : show_val_kb(m, "MemTotal: ", i.totalram);
59 1 : show_val_kb(m, "MemFree: ", i.freeram);
60 1 : show_val_kb(m, "MemAvailable: ", available);
61 1 : show_val_kb(m, "Buffers: ", i.bufferram);
62 1 : show_val_kb(m, "Cached: ", cached);
63 1 : show_val_kb(m, "SwapCached: ", total_swapcache_pages());
64 1 : show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] +
65 1 : pages[LRU_ACTIVE_FILE]);
66 1 : show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] +
67 1 : pages[LRU_INACTIVE_FILE]);
68 1 : show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]);
69 1 : show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
70 1 : show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]);
71 1 : show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
72 1 : show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]);
73 1 : show_val_kb(m, "Mlocked: ", global_zone_page_state(NR_MLOCK));
74 :
75 : #ifdef CONFIG_HIGHMEM
76 : show_val_kb(m, "HighTotal: ", i.totalhigh);
77 : show_val_kb(m, "HighFree: ", i.freehigh);
78 : show_val_kb(m, "LowTotal: ", i.totalram - i.totalhigh);
79 : show_val_kb(m, "LowFree: ", i.freeram - i.freehigh);
80 : #endif
81 :
82 : #ifndef CONFIG_MMU
83 : show_val_kb(m, "MmapCopy: ",
84 : (unsigned long)atomic_long_read(&mmap_pages_allocated));
85 : #endif
86 :
87 1 : show_val_kb(m, "SwapTotal: ", i.totalswap);
88 1 : show_val_kb(m, "SwapFree: ", i.freeswap);
89 1 : show_val_kb(m, "Dirty: ",
90 : global_node_page_state(NR_FILE_DIRTY));
91 1 : show_val_kb(m, "Writeback: ",
92 : global_node_page_state(NR_WRITEBACK));
93 1 : show_val_kb(m, "AnonPages: ",
94 : global_node_page_state(NR_ANON_MAPPED));
95 1 : show_val_kb(m, "Mapped: ",
96 : global_node_page_state(NR_FILE_MAPPED));
97 1 : show_val_kb(m, "Shmem: ", i.sharedram);
98 1 : show_val_kb(m, "KReclaimable: ", sreclaimable +
99 1 : global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
100 1 : show_val_kb(m, "Slab: ", sreclaimable + sunreclaim);
101 1 : show_val_kb(m, "SReclaimable: ", sreclaimable);
102 1 : show_val_kb(m, "SUnreclaim: ", sunreclaim);
103 1 : seq_printf(m, "KernelStack: %8lu kB\n",
104 : global_node_page_state(NR_KERNEL_STACK_KB));
105 : #ifdef CONFIG_SHADOW_CALL_STACK
106 : seq_printf(m, "ShadowCallStack:%8lu kB\n",
107 : global_node_page_state(NR_KERNEL_SCS_KB));
108 : #endif
109 1 : show_val_kb(m, "PageTables: ",
110 : global_node_page_state(NR_PAGETABLE));
111 :
112 1 : show_val_kb(m, "NFS_Unstable: ", 0);
113 1 : show_val_kb(m, "Bounce: ",
114 : global_zone_page_state(NR_BOUNCE));
115 1 : show_val_kb(m, "WritebackTmp: ",
116 : global_node_page_state(NR_WRITEBACK_TEMP));
117 1 : show_val_kb(m, "CommitLimit: ", vm_commit_limit());
118 1 : show_val_kb(m, "Committed_AS: ", committed);
119 1 : seq_printf(m, "VmallocTotal: %8lu kB\n",
120 : (unsigned long)VMALLOC_TOTAL >> 10);
121 1 : show_val_kb(m, "VmallocUsed: ", vmalloc_nr_pages());
122 1 : show_val_kb(m, "VmallocChunk: ", 0ul);
123 1 : show_val_kb(m, "Percpu: ", pcpu_nr_pages());
124 :
125 : #ifdef CONFIG_MEMORY_FAILURE
126 : seq_printf(m, "HardwareCorrupted: %5lu kB\n",
127 : atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
128 : #endif
129 :
130 : #ifdef CONFIG_TRANSPARENT_HUGEPAGE
131 1 : show_val_kb(m, "AnonHugePages: ",
132 : global_node_page_state(NR_ANON_THPS));
133 1 : show_val_kb(m, "ShmemHugePages: ",
134 : global_node_page_state(NR_SHMEM_THPS));
135 1 : show_val_kb(m, "ShmemPmdMapped: ",
136 : global_node_page_state(NR_SHMEM_PMDMAPPED));
137 1 : show_val_kb(m, "FileHugePages: ",
138 : global_node_page_state(NR_FILE_THPS));
139 1 : show_val_kb(m, "FilePmdMapped: ",
140 : global_node_page_state(NR_FILE_PMDMAPPED));
141 : #endif
142 :
143 : #ifdef CONFIG_CMA
144 : show_val_kb(m, "CmaTotal: ", totalcma_pages);
145 : show_val_kb(m, "CmaFree: ",
146 : global_zone_page_state(NR_FREE_CMA_PAGES));
147 : #endif
148 :
149 1 : hugetlb_report_meminfo(m);
150 :
151 1 : arch_report_meminfo(m);
152 :
153 1 : return 0;
154 : }
155 :
156 1 : static int __init proc_meminfo_init(void)
157 : {
158 1 : proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
159 1 : return 0;
160 : }
161 : fs_initcall(proc_meminfo_init);
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