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
arch_report_meminfo(struct seq_file * m)22 void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
23 {
24 }
25
show_val_kb(struct seq_file * m,const char * s,unsigned long num)26 static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
27 {
28 seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8);
29 seq_write(m, " kB\n", 4);
30 }
31
meminfo_proc_show(struct seq_file * m,void * v)32 static int meminfo_proc_show(struct seq_file *m, void *v)
33 {
34 struct sysinfo i;
35 unsigned long committed;
36 long cached;
37 long available;
38 unsigned long pages[NR_LRU_LISTS];
39 unsigned long sreclaimable, sunreclaim;
40 int lru;
41
42 si_meminfo(&i);
43 si_swapinfo(&i);
44 committed = vm_memory_committed();
45
46 cached = global_node_page_state(NR_FILE_PAGES) -
47 total_swapcache_pages() - i.bufferram;
48 if (cached < 0)
49 cached = 0;
50
51 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
52 pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
53
54 available = si_mem_available();
55 sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B);
56 sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B);
57
58 show_val_kb(m, "MemTotal: ", i.totalram);
59 show_val_kb(m, "MemFree: ", i.freeram);
60 show_val_kb(m, "MemAvailable: ", available);
61 show_val_kb(m, "Buffers: ", i.bufferram);
62 show_val_kb(m, "Cached: ", cached);
63 show_val_kb(m, "SwapCached: ", total_swapcache_pages());
64 show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] +
65 pages[LRU_ACTIVE_FILE]);
66 show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] +
67 pages[LRU_INACTIVE_FILE]);
68 show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]);
69 show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
70 show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]);
71 show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
72 show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]);
73 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 show_val_kb(m, "SwapTotal: ", i.totalswap);
88 show_val_kb(m, "SwapFree: ", i.freeswap);
89 show_val_kb(m, "Dirty: ",
90 global_node_page_state(NR_FILE_DIRTY));
91 show_val_kb(m, "Writeback: ",
92 global_node_page_state(NR_WRITEBACK));
93 show_val_kb(m, "AnonPages: ",
94 global_node_page_state(NR_ANON_MAPPED));
95 show_val_kb(m, "Mapped: ",
96 global_node_page_state(NR_FILE_MAPPED));
97 show_val_kb(m, "Shmem: ", i.sharedram);
98 show_val_kb(m, "KReclaimable: ", sreclaimable +
99 global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
100 show_val_kb(m, "Slab: ", sreclaimable + sunreclaim);
101 show_val_kb(m, "SReclaimable: ", sreclaimable);
102 show_val_kb(m, "SUnreclaim: ", sunreclaim);
103 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 show_val_kb(m, "PageTables: ",
110 global_node_page_state(NR_PAGETABLE));
111
112 show_val_kb(m, "NFS_Unstable: ", 0);
113 show_val_kb(m, "Bounce: ",
114 global_zone_page_state(NR_BOUNCE));
115 show_val_kb(m, "WritebackTmp: ",
116 global_node_page_state(NR_WRITEBACK_TEMP));
117 show_val_kb(m, "CommitLimit: ", vm_commit_limit());
118 show_val_kb(m, "Committed_AS: ", committed);
119 seq_printf(m, "VmallocTotal: %8lu kB\n",
120 (unsigned long)VMALLOC_TOTAL >> 10);
121 show_val_kb(m, "VmallocUsed: ", vmalloc_nr_pages());
122 show_val_kb(m, "VmallocChunk: ", 0ul);
123 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 show_val_kb(m, "AnonHugePages: ",
132 global_node_page_state(NR_ANON_THPS));
133 show_val_kb(m, "ShmemHugePages: ",
134 global_node_page_state(NR_SHMEM_THPS));
135 show_val_kb(m, "ShmemPmdMapped: ",
136 global_node_page_state(NR_SHMEM_PMDMAPPED));
137 show_val_kb(m, "FileHugePages: ",
138 global_node_page_state(NR_FILE_THPS));
139 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 hugetlb_report_meminfo(m);
150
151 arch_report_meminfo(m);
152
153 return 0;
154 }
155
proc_meminfo_init(void)156 static int __init proc_meminfo_init(void)
157 {
158 proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
159 return 0;
160 }
161 fs_initcall(proc_meminfo_init);
162