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/memblock.h>
10 #include <linux/proc_fs.h>
11 #include <linux/percpu.h>
12 #include <linux/seq_file.h>
13 #include <linux/swap.h>
14 #include <linux/vmstat.h>
15 #include <linux/atomic.h>
16 #include <linux/vmalloc.h>
17 #ifdef CONFIG_CMA
18 #include <linux/cma.h>
19 #endif
20 #include <linux/zswap.h>
21 #include <asm/page.h>
22 #include "internal.h"
23
arch_report_meminfo(struct seq_file * m)24 void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
25 {
26 }
27
show_val_kb(struct seq_file * m,const char * s,unsigned long num)28 static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
29 {
30 seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8);
31 seq_write(m, " kB\n", 4);
32 }
33
meminfo_proc_show(struct seq_file * m,void * v)34 static int meminfo_proc_show(struct seq_file *m, void *v)
35 {
36 struct sysinfo i;
37 unsigned long committed;
38 long cached;
39 long available;
40 unsigned long pages[NR_LRU_LISTS];
41 unsigned long sreclaimable, sunreclaim;
42 int lru;
43
44 si_meminfo(&i);
45 si_swapinfo(&i);
46 committed = vm_memory_committed();
47
48 cached = global_node_page_state(NR_FILE_PAGES) -
49 total_swapcache_pages() - i.bufferram;
50 if (cached < 0)
51 cached = 0;
52
53 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
54 pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
55
56 available = si_mem_available();
57 sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B);
58 sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B);
59
60 show_val_kb(m, "MemTotal: ", i.totalram);
61 show_val_kb(m, "MemFree: ", i.freeram);
62 show_val_kb(m, "MemAvailable: ", available);
63 show_val_kb(m, "Buffers: ", i.bufferram);
64 show_val_kb(m, "Cached: ", cached);
65 show_val_kb(m, "SwapCached: ", total_swapcache_pages());
66 show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] +
67 pages[LRU_ACTIVE_FILE]);
68 show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] +
69 pages[LRU_INACTIVE_FILE]);
70 show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]);
71 show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
72 show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]);
73 show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
74 show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]);
75 show_val_kb(m, "Mlocked: ", global_zone_page_state(NR_MLOCK));
76
77 #ifdef CONFIG_HIGHMEM
78 show_val_kb(m, "HighTotal: ", i.totalhigh);
79 show_val_kb(m, "HighFree: ", i.freehigh);
80 show_val_kb(m, "LowTotal: ", i.totalram - i.totalhigh);
81 show_val_kb(m, "LowFree: ", i.freeram - i.freehigh);
82 #endif
83
84 #ifndef CONFIG_MMU
85 show_val_kb(m, "MmapCopy: ",
86 (unsigned long)atomic_long_read(&mmap_pages_allocated));
87 #endif
88
89 show_val_kb(m, "SwapTotal: ", i.totalswap);
90 show_val_kb(m, "SwapFree: ", i.freeswap);
91 #ifdef CONFIG_ZSWAP
92 show_val_kb(m, "Zswap: ", zswap_total_pages());
93 seq_printf(m, "Zswapped: %8lu kB\n",
94 (unsigned long)atomic_read(&zswap_stored_pages) <<
95 (PAGE_SHIFT - 10));
96 #endif
97 show_val_kb(m, "Dirty: ",
98 global_node_page_state(NR_FILE_DIRTY));
99 show_val_kb(m, "Writeback: ",
100 global_node_page_state(NR_WRITEBACK));
101 show_val_kb(m, "AnonPages: ",
102 global_node_page_state(NR_ANON_MAPPED));
103 show_val_kb(m, "Mapped: ",
104 global_node_page_state(NR_FILE_MAPPED));
105 show_val_kb(m, "Shmem: ", i.sharedram);
106 show_val_kb(m, "KReclaimable: ", sreclaimable +
107 global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
108 show_val_kb(m, "Slab: ", sreclaimable + sunreclaim);
109 show_val_kb(m, "SReclaimable: ", sreclaimable);
110 show_val_kb(m, "SUnreclaim: ", sunreclaim);
111 seq_printf(m, "KernelStack: %8lu kB\n",
112 global_node_page_state(NR_KERNEL_STACK_KB));
113 #ifdef CONFIG_SHADOW_CALL_STACK
114 seq_printf(m, "ShadowCallStack:%8lu kB\n",
115 global_node_page_state(NR_KERNEL_SCS_KB));
116 #endif
117 show_val_kb(m, "PageTables: ",
118 global_node_page_state(NR_PAGETABLE));
119 show_val_kb(m, "SecPageTables: ",
120 global_node_page_state(NR_SECONDARY_PAGETABLE));
121
122 show_val_kb(m, "NFS_Unstable: ", 0);
123 show_val_kb(m, "Bounce: ",
124 global_zone_page_state(NR_BOUNCE));
125 show_val_kb(m, "WritebackTmp: ",
126 global_node_page_state(NR_WRITEBACK_TEMP));
127 show_val_kb(m, "CommitLimit: ", vm_commit_limit());
128 show_val_kb(m, "Committed_AS: ", committed);
129 seq_printf(m, "VmallocTotal: %8lu kB\n",
130 (unsigned long)VMALLOC_TOTAL >> 10);
131 show_val_kb(m, "VmallocUsed: ", vmalloc_nr_pages());
132 show_val_kb(m, "VmallocChunk: ", 0ul);
133 show_val_kb(m, "Percpu: ", pcpu_nr_pages());
134
135 memtest_report_meminfo(m);
136
137 #ifdef CONFIG_MEMORY_FAILURE
138 seq_printf(m, "HardwareCorrupted: %5lu kB\n",
139 atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
140 #endif
141
142 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
143 show_val_kb(m, "AnonHugePages: ",
144 global_node_page_state(NR_ANON_THPS));
145 show_val_kb(m, "ShmemHugePages: ",
146 global_node_page_state(NR_SHMEM_THPS));
147 show_val_kb(m, "ShmemPmdMapped: ",
148 global_node_page_state(NR_SHMEM_PMDMAPPED));
149 show_val_kb(m, "FileHugePages: ",
150 global_node_page_state(NR_FILE_THPS));
151 show_val_kb(m, "FilePmdMapped: ",
152 global_node_page_state(NR_FILE_PMDMAPPED));
153 #endif
154
155 #ifdef CONFIG_CMA
156 show_val_kb(m, "CmaTotal: ", totalcma_pages);
157 show_val_kb(m, "CmaFree: ",
158 global_zone_page_state(NR_FREE_CMA_PAGES));
159 #endif
160
161 #ifdef CONFIG_UNACCEPTED_MEMORY
162 show_val_kb(m, "Unaccepted: ",
163 global_zone_page_state(NR_UNACCEPTED));
164 #endif
165
166 hugetlb_report_meminfo(m);
167
168 arch_report_meminfo(m);
169
170 return 0;
171 }
172
proc_meminfo_init(void)173 static int __init proc_meminfo_init(void)
174 {
175 struct proc_dir_entry *pde;
176
177 pde = proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
178 pde_make_permanent(pde);
179 return 0;
180 }
181 fs_initcall(proc_meminfo_init);
182