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 seq_printf(m, "Zswap: %8lu kB\n",
93 (unsigned long)(zswap_pool_total_size >> 10));
94 seq_printf(m, "Zswapped: %8lu kB\n",
95 (unsigned long)atomic_read(&zswap_stored_pages) <<
96 (PAGE_SHIFT - 10));
97 #endif
98 show_val_kb(m, "Dirty: ",
99 global_node_page_state(NR_FILE_DIRTY));
100 show_val_kb(m, "Writeback: ",
101 global_node_page_state(NR_WRITEBACK));
102 show_val_kb(m, "AnonPages: ",
103 global_node_page_state(NR_ANON_MAPPED));
104 show_val_kb(m, "Mapped: ",
105 global_node_page_state(NR_FILE_MAPPED));
106 show_val_kb(m, "Shmem: ", i.sharedram);
107 show_val_kb(m, "KReclaimable: ", sreclaimable +
108 global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
109 show_val_kb(m, "Slab: ", sreclaimable + sunreclaim);
110 show_val_kb(m, "SReclaimable: ", sreclaimable);
111 show_val_kb(m, "SUnreclaim: ", sunreclaim);
112 seq_printf(m, "KernelStack: %8lu kB\n",
113 global_node_page_state(NR_KERNEL_STACK_KB));
114 #ifdef CONFIG_SHADOW_CALL_STACK
115 seq_printf(m, "ShadowCallStack:%8lu kB\n",
116 global_node_page_state(NR_KERNEL_SCS_KB));
117 #endif
118 show_val_kb(m, "PageTables: ",
119 global_node_page_state(NR_PAGETABLE));
120 show_val_kb(m, "SecPageTables: ",
121 global_node_page_state(NR_SECONDARY_PAGETABLE));
122
123 show_val_kb(m, "NFS_Unstable: ", 0);
124 show_val_kb(m, "Bounce: ",
125 global_zone_page_state(NR_BOUNCE));
126 show_val_kb(m, "WritebackTmp: ",
127 global_node_page_state(NR_WRITEBACK_TEMP));
128 show_val_kb(m, "CommitLimit: ", vm_commit_limit());
129 show_val_kb(m, "Committed_AS: ", committed);
130 seq_printf(m, "VmallocTotal: %8lu kB\n",
131 (unsigned long)VMALLOC_TOTAL >> 10);
132 show_val_kb(m, "VmallocUsed: ", vmalloc_nr_pages());
133 show_val_kb(m, "VmallocChunk: ", 0ul);
134 show_val_kb(m, "Percpu: ", pcpu_nr_pages());
135
136 memtest_report_meminfo(m);
137
138 #ifdef CONFIG_MEMORY_FAILURE
139 seq_printf(m, "HardwareCorrupted: %5lu kB\n",
140 atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
141 #endif
142
143 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
144 show_val_kb(m, "AnonHugePages: ",
145 global_node_page_state(NR_ANON_THPS));
146 show_val_kb(m, "ShmemHugePages: ",
147 global_node_page_state(NR_SHMEM_THPS));
148 show_val_kb(m, "ShmemPmdMapped: ",
149 global_node_page_state(NR_SHMEM_PMDMAPPED));
150 show_val_kb(m, "FileHugePages: ",
151 global_node_page_state(NR_FILE_THPS));
152 show_val_kb(m, "FilePmdMapped: ",
153 global_node_page_state(NR_FILE_PMDMAPPED));
154 #endif
155
156 #ifdef CONFIG_CMA
157 show_val_kb(m, "CmaTotal: ", totalcma_pages);
158 show_val_kb(m, "CmaFree: ",
159 global_zone_page_state(NR_FREE_CMA_PAGES));
160 #endif
161
162 #ifdef CONFIG_UNACCEPTED_MEMORY
163 show_val_kb(m, "Unaccepted: ",
164 global_zone_page_state(NR_UNACCEPTED));
165 #endif
166
167 hugetlb_report_meminfo(m);
168
169 arch_report_meminfo(m);
170
171 return 0;
172 }
173
proc_meminfo_init(void)174 static int __init proc_meminfo_init(void)
175 {
176 struct proc_dir_entry *pde;
177
178 pde = proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
179 pde_make_permanent(pde);
180 return 0;
181 }
182 fs_initcall(proc_meminfo_init);
183
