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