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 | |
24 | void __attribute__((weak)) arch_report_meminfo(struct seq_file *m) |
25 | { |
26 | } |
27 | |
28 | static void show_val_kb(struct seq_file *m, const char *s, unsigned long num) |
29 | { |
30 | seq_put_decimal_ull_width(m, delimiter: s, num: num << (PAGE_SHIFT - 10), width: 8); |
31 | seq_write(seq: m, data: " kB\n" , len: 4); |
32 | } |
33 | |
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(val: &i); |
45 | si_swapinfo(&i); |
46 | committed = vm_memory_committed(); |
47 | |
48 | cached = global_node_page_state(item: 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(item: NR_LRU_BASE + lru); |
55 | |
56 | available = si_mem_available(); |
57 | sreclaimable = global_node_page_state_pages(item: NR_SLAB_RECLAIMABLE_B); |
58 | sunreclaim = global_node_page_state_pages(item: NR_SLAB_UNRECLAIMABLE_B); |
59 | |
60 | show_val_kb(m, s: "MemTotal: " , num: i.totalram); |
61 | show_val_kb(m, s: "MemFree: " , num: i.freeram); |
62 | show_val_kb(m, s: "MemAvailable: " , num: available); |
63 | show_val_kb(m, s: "Buffers: " , num: i.bufferram); |
64 | show_val_kb(m, s: "Cached: " , num: cached); |
65 | show_val_kb(m, s: "SwapCached: " , num: total_swapcache_pages()); |
66 | show_val_kb(m, s: "Active: " , num: pages[LRU_ACTIVE_ANON] + |
67 | pages[LRU_ACTIVE_FILE]); |
68 | show_val_kb(m, s: "Inactive: " , num: pages[LRU_INACTIVE_ANON] + |
69 | pages[LRU_INACTIVE_FILE]); |
70 | show_val_kb(m, s: "Active(anon): " , num: pages[LRU_ACTIVE_ANON]); |
71 | show_val_kb(m, s: "Inactive(anon): " , num: pages[LRU_INACTIVE_ANON]); |
72 | show_val_kb(m, s: "Active(file): " , num: pages[LRU_ACTIVE_FILE]); |
73 | show_val_kb(m, s: "Inactive(file): " , num: pages[LRU_INACTIVE_FILE]); |
74 | show_val_kb(m, s: "Unevictable: " , num: pages[LRU_UNEVICTABLE]); |
75 | show_val_kb(m, s: "Mlocked: " , num: global_zone_page_state(item: 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, s: "SwapTotal: " , num: i.totalswap); |
90 | show_val_kb(m, s: "SwapFree: " , num: i.freeswap); |
91 | #ifdef CONFIG_ZSWAP |
92 | seq_printf(m, fmt: "Zswap: %8lu kB\n" , |
93 | (unsigned long)(zswap_pool_total_size >> 10)); |
94 | seq_printf(m, fmt: "Zswapped: %8lu kB\n" , |
95 | (unsigned long)atomic_read(v: &zswap_stored_pages) << |
96 | (PAGE_SHIFT - 10)); |
97 | #endif |
98 | show_val_kb(m, s: "Dirty: " , |
99 | num: global_node_page_state(item: NR_FILE_DIRTY)); |
100 | show_val_kb(m, s: "Writeback: " , |
101 | num: global_node_page_state(item: NR_WRITEBACK)); |
102 | show_val_kb(m, s: "AnonPages: " , |
103 | num: global_node_page_state(item: NR_ANON_MAPPED)); |
104 | show_val_kb(m, s: "Mapped: " , |
105 | num: global_node_page_state(item: NR_FILE_MAPPED)); |
106 | show_val_kb(m, s: "Shmem: " , num: i.sharedram); |
107 | show_val_kb(m, s: "KReclaimable: " , num: sreclaimable + |
108 | global_node_page_state(item: NR_KERNEL_MISC_RECLAIMABLE)); |
109 | show_val_kb(m, s: "Slab: " , num: sreclaimable + sunreclaim); |
110 | show_val_kb(m, s: "SReclaimable: " , num: sreclaimable); |
111 | show_val_kb(m, s: "SUnreclaim: " , num: sunreclaim); |
112 | seq_printf(m, fmt: "KernelStack: %8lu kB\n" , |
113 | global_node_page_state(item: 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, s: "PageTables: " , |
119 | num: global_node_page_state(item: NR_PAGETABLE)); |
120 | show_val_kb(m, s: "SecPageTables: " , |
121 | num: global_node_page_state(item: NR_SECONDARY_PAGETABLE)); |
122 | |
123 | show_val_kb(m, s: "NFS_Unstable: " , num: 0); |
124 | show_val_kb(m, s: "Bounce: " , |
125 | num: global_zone_page_state(item: NR_BOUNCE)); |
126 | show_val_kb(m, s: "WritebackTmp: " , |
127 | num: global_node_page_state(item: NR_WRITEBACK_TEMP)); |
128 | show_val_kb(m, s: "CommitLimit: " , num: vm_commit_limit()); |
129 | show_val_kb(m, s: "Committed_AS: " , num: committed); |
130 | seq_printf(m, fmt: "VmallocTotal: %8lu kB\n" , |
131 | (unsigned long)VMALLOC_TOTAL >> 10); |
132 | show_val_kb(m, s: "VmallocUsed: " , num: vmalloc_nr_pages()); |
133 | show_val_kb(m, s: "VmallocChunk: " , num: 0ul); |
134 | show_val_kb(m, s: "Percpu: " , num: pcpu_nr_pages()); |
135 | |
136 | memtest_report_meminfo(m); |
137 | |
138 | #ifdef CONFIG_MEMORY_FAILURE |
139 | seq_printf(m, fmt: "HardwareCorrupted: %5lu kB\n" , |
140 | atomic_long_read(v: &num_poisoned_pages) << (PAGE_SHIFT - 10)); |
141 | #endif |
142 | |
143 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
144 | show_val_kb(m, s: "AnonHugePages: " , |
145 | num: global_node_page_state(item: NR_ANON_THPS)); |
146 | show_val_kb(m, s: "ShmemHugePages: " , |
147 | num: global_node_page_state(item: NR_SHMEM_THPS)); |
148 | show_val_kb(m, s: "ShmemPmdMapped: " , |
149 | num: global_node_page_state(item: NR_SHMEM_PMDMAPPED)); |
150 | show_val_kb(m, s: "FileHugePages: " , |
151 | num: global_node_page_state(item: NR_FILE_THPS)); |
152 | show_val_kb(m, s: "FilePmdMapped: " , |
153 | num: global_node_page_state(item: NR_FILE_PMDMAPPED)); |
154 | #endif |
155 | |
156 | #ifdef CONFIG_CMA |
157 | show_val_kb(m, s: "CmaTotal: " , num: totalcma_pages); |
158 | show_val_kb(m, s: "CmaFree: " , |
159 | num: global_zone_page_state(item: NR_FREE_CMA_PAGES)); |
160 | #endif |
161 | |
162 | #ifdef CONFIG_UNACCEPTED_MEMORY |
163 | show_val_kb(m, s: "Unaccepted: " , |
164 | num: global_zone_page_state(item: NR_UNACCEPTED)); |
165 | #endif |
166 | |
167 | hugetlb_report_meminfo(m); |
168 | |
169 | arch_report_meminfo(m); |
170 | |
171 | return 0; |
172 | } |
173 | |
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 | |