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 #ifdef CONFIG_MEM_PURGEABLE
21 #include <linux/mm_purgeable.h>
22 #endif
23 #include <linux/zswap.h>
24 #include <asm/page.h>
25 #include "internal.h"
26
arch_report_meminfo(struct seq_file * m)27 void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
28 {
29 }
30
show_val_kb(struct seq_file * m,const char * s,unsigned long num)31 static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
32 {
33 seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8);
34 seq_write(m, " kB\n", 4);
35 }
36
meminfo_proc_show(struct seq_file * m,void * v)37 static int meminfo_proc_show(struct seq_file *m, void *v)
38 {
39 struct sysinfo i;
40 unsigned long committed;
41 long cached;
42 long available;
43 unsigned long pages[NR_LRU_LISTS];
44 unsigned long sreclaimable, sunreclaim;
45 int lru;
46 unsigned long nr_purg_active = 0;
47 unsigned long nr_purg_inactive = 0;
48 #ifdef CONFIG_MEM_PURGEABLE
49 unsigned long nr_purg_pined = 0;
50 #endif
51
52 si_meminfo(&i);
53 si_swapinfo(&i);
54 committed = vm_memory_committed();
55
56 cached = global_node_page_state(NR_FILE_PAGES) -
57 total_swapcache_pages() - i.bufferram;
58 if (cached < 0)
59 cached = 0;
60
61 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
62 pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
63
64 #ifdef CONFIG_MEM_PURGEABLE
65 nr_purg_active = pages[LRU_ACTIVE_PURGEABLE];
66 nr_purg_inactive = pages[LRU_INACTIVE_PURGEABLE];
67 purg_pages_info(NULL, &nr_purg_pined);
68 nr_purg_pined = min(nr_purg_pined, nr_purg_active + nr_purg_inactive);
69 #endif
70
71 available = si_mem_available();
72 sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B);
73 sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B);
74
75 show_val_kb(m, "MemTotal: ", i.totalram);
76 show_val_kb(m, "MemFree: ", i.freeram);
77 show_val_kb(m, "MemAvailable: ", available);
78 show_val_kb(m, "Buffers: ", i.bufferram);
79 show_val_kb(m, "Cached: ", cached);
80 show_val_kb(m, "SwapCached: ", total_swapcache_pages());
81 show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] +
82 #ifdef CONFIG_MEM_PURGEABLE
83 pages[LRU_ACTIVE_FILE] +
84 nr_purg_active);
85 #else
86 pages[LRU_ACTIVE_FILE]);
87 #endif
88
89 show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] +
90 pages[LRU_INACTIVE_FILE] +
91 nr_purg_inactive);
92 show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]);
93 show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
94 show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]);
95 show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
96 #ifdef CONFIG_MEM_PURGEABLE
97 show_val_kb(m, "Active(purg): ", nr_purg_active);
98 show_val_kb(m, "Inactive(purg): ", nr_purg_inactive);
99 show_val_kb(m, "Pined(purg): ", nr_purg_pined);
100 #endif
101 show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]);
102 show_val_kb(m, "Mlocked: ", global_zone_page_state(NR_MLOCK));
103
104 #ifdef CONFIG_HIGHMEM
105 show_val_kb(m, "HighTotal: ", i.totalhigh);
106 show_val_kb(m, "HighFree: ", i.freehigh);
107 show_val_kb(m, "LowTotal: ", i.totalram - i.totalhigh);
108 show_val_kb(m, "LowFree: ", i.freeram - i.freehigh);
109 #endif
110
111 #ifndef CONFIG_MMU
112 show_val_kb(m, "MmapCopy: ",
113 (unsigned long)atomic_long_read(&mmap_pages_allocated));
114 #endif
115
116 show_val_kb(m, "SwapTotal: ", i.totalswap);
117 show_val_kb(m, "SwapFree: ", i.freeswap);
118 #ifdef CONFIG_ZSWAP
119 seq_printf(m, "Zswap: %8lu kB\n",
120 (unsigned long)(zswap_pool_total_size >> 10));
121 seq_printf(m, "Zswapped: %8lu kB\n",
122 (unsigned long)atomic_read(&zswap_stored_pages) <<
123 (PAGE_SHIFT - 10));
124 #endif
125 show_val_kb(m, "Dirty: ",
126 global_node_page_state(NR_FILE_DIRTY));
127 show_val_kb(m, "Writeback: ",
128 global_node_page_state(NR_WRITEBACK));
129 show_val_kb(m, "AnonPages: ",
130 global_node_page_state(NR_ANON_MAPPED));
131 show_val_kb(m, "Mapped: ",
132 global_node_page_state(NR_FILE_MAPPED));
133 show_val_kb(m, "Shmem: ", i.sharedram);
134 show_val_kb(m, "KReclaimable: ", sreclaimable +
135 global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
136 show_val_kb(m, "Slab: ", sreclaimable + sunreclaim);
137 show_val_kb(m, "SReclaimable: ", sreclaimable);
138 show_val_kb(m, "SUnreclaim: ", sunreclaim);
139 seq_printf(m, "KernelStack: %8lu kB\n",
140 global_node_page_state(NR_KERNEL_STACK_KB));
141 #ifdef CONFIG_SHADOW_CALL_STACK
142 seq_printf(m, "ShadowCallStack:%8lu kB\n",
143 global_node_page_state(NR_KERNEL_SCS_KB));
144 #endif
145 show_val_kb(m, "PageTables: ",
146 global_node_page_state(NR_PAGETABLE));
147 show_val_kb(m, "SecPageTables: ",
148 global_node_page_state(NR_SECONDARY_PAGETABLE));
149
150 show_val_kb(m, "NFS_Unstable: ", 0);
151 show_val_kb(m, "Bounce: ",
152 global_zone_page_state(NR_BOUNCE));
153 show_val_kb(m, "WritebackTmp: ",
154 global_node_page_state(NR_WRITEBACK_TEMP));
155 show_val_kb(m, "CommitLimit: ", vm_commit_limit());
156 show_val_kb(m, "Committed_AS: ", committed);
157 seq_printf(m, "VmallocTotal: %8lu kB\n",
158 (unsigned long)VMALLOC_TOTAL >> 10);
159 show_val_kb(m, "VmallocUsed: ", vmalloc_nr_pages());
160 show_val_kb(m, "VmallocChunk: ", 0ul);
161 show_val_kb(m, "Percpu: ", pcpu_nr_pages());
162
163 memtest_report_meminfo(m);
164
165 #ifdef CONFIG_MEMORY_FAILURE
166 seq_printf(m, "HardwareCorrupted: %5lu kB\n",
167 atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
168 #endif
169
170 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
171 show_val_kb(m, "AnonHugePages: ",
172 global_node_page_state(NR_ANON_THPS));
173 show_val_kb(m, "ShmemHugePages: ",
174 global_node_page_state(NR_SHMEM_THPS));
175 show_val_kb(m, "ShmemPmdMapped: ",
176 global_node_page_state(NR_SHMEM_PMDMAPPED));
177 show_val_kb(m, "FileHugePages: ",
178 global_node_page_state(NR_FILE_THPS));
179 show_val_kb(m, "FilePmdMapped: ",
180 global_node_page_state(NR_FILE_PMDMAPPED));
181 #endif
182
183 #ifdef CONFIG_CMA
184 show_val_kb(m, "CmaTotal: ", totalcma_pages);
185 show_val_kb(m, "CmaFree: ",
186 global_zone_page_state(NR_FREE_CMA_PAGES));
187 #endif
188
189 #ifdef CONFIG_UNACCEPTED_MEMORY
190 show_val_kb(m, "Unaccepted: ",
191 global_zone_page_state(NR_UNACCEPTED));
192 #endif
193
194 hugetlb_report_meminfo(m);
195
196 arch_report_meminfo(m);
197
198 return 0;
199 }
200
proc_meminfo_init(void)201 static int __init proc_meminfo_init(void)
202 {
203 struct proc_dir_entry *pde;
204
205 pde = proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
206 pde_make_permanent(pde);
207 return 0;
208 }
209 fs_initcall(proc_meminfo_init);
210