tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 <asm/page.h>
21#include "internal.h"
22
23void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
24{
25}
26
27static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
28{
29 seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8);
30 seq_write(m, " kB\n", 4);
31}
32
33static int meminfo_proc_show(struct seq_file *m, void *v)
34{
35 struct sysinfo i;
36 unsigned long committed;
37 long cached;
38 long available;
39 unsigned long pages[NR_LRU_LISTS];
40 unsigned long sreclaimable, sunreclaim;
41 int lru;
42
43 si_meminfo(&i);
44 si_swapinfo(&i);
45 committed = vm_memory_committed();
46
47 cached = global_node_page_state(NR_FILE_PAGES) -
48 total_swapcache_pages() - i.bufferram;
49 if (cached < 0)
50 cached = 0;
51
52 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
53 pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
54
55 available = si_mem_available();
56 sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B);
57 sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B);
58
59 show_val_kb(m, "MemTotal: ", i.totalram);
60 show_val_kb(m, "MemFree: ", i.freeram);
61 show_val_kb(m, "MemAvailable: ", available);
62 show_val_kb(m, "Buffers: ", i.bufferram);
63 show_val_kb(m, "Cached: ", cached);
64 show_val_kb(m, "SwapCached: ", total_swapcache_pages());
65 show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] +
66 pages[LRU_ACTIVE_FILE]);
67 show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] +
68 pages[LRU_INACTIVE_FILE]);
69 show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]);
70 show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
71 show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]);
72 show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
73 show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]);
74 show_val_kb(m, "Mlocked: ", global_zone_page_state(NR_MLOCK));
75
76#ifdef CONFIG_HIGHMEM
77 show_val_kb(m, "HighTotal: ", i.totalhigh);
78 show_val_kb(m, "HighFree: ", i.freehigh);
79 show_val_kb(m, "LowTotal: ", i.totalram - i.totalhigh);
80 show_val_kb(m, "LowFree: ", i.freeram - i.freehigh);
81#endif
82
83#ifndef CONFIG_MMU
84 show_val_kb(m, "MmapCopy: ",
85 (unsigned long)atomic_long_read(&mmap_pages_allocated));
86#endif
87
88 show_val_kb(m, "SwapTotal: ", i.totalswap);
89 show_val_kb(m, "SwapFree: ", i.freeswap);
90#ifdef CONFIG_ZSWAP
91 seq_printf(m, "Zswap: %8lu kB\n",
92 (unsigned long)(zswap_pool_total_size >> 10));
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#ifdef CONFIG_MEMTEST
136 if (early_memtest_done) {
137 unsigned long early_memtest_bad_size_kb;
138
139 early_memtest_bad_size_kb = early_memtest_bad_size>>10;
140 if (early_memtest_bad_size && !early_memtest_bad_size_kb)
141 early_memtest_bad_size_kb = 1;
142 /* When 0 is reported, it means there actually was a successful test */
143 seq_printf(m, "EarlyMemtestBad: %5lu kB\n", early_memtest_bad_size_kb);
144 }
145#endif
146
147#ifdef CONFIG_MEMORY_FAILURE
148 seq_printf(m, "HardwareCorrupted: %5lu kB\n",
149 atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
150#endif
151
152#ifdef CONFIG_TRANSPARENT_HUGEPAGE
153 show_val_kb(m, "AnonHugePages: ",
154 global_node_page_state(NR_ANON_THPS));
155 show_val_kb(m, "ShmemHugePages: ",
156 global_node_page_state(NR_SHMEM_THPS));
157 show_val_kb(m, "ShmemPmdMapped: ",
158 global_node_page_state(NR_SHMEM_PMDMAPPED));
159 show_val_kb(m, "FileHugePages: ",
160 global_node_page_state(NR_FILE_THPS));
161 show_val_kb(m, "FilePmdMapped: ",
162 global_node_page_state(NR_FILE_PMDMAPPED));
163#endif
164
165#ifdef CONFIG_CMA
166 show_val_kb(m, "CmaTotal: ", totalcma_pages);
167 show_val_kb(m, "CmaFree: ",
168 global_zone_page_state(NR_FREE_CMA_PAGES));
169#endif
170
171#ifdef CONFIG_UNACCEPTED_MEMORY
172 show_val_kb(m, "Unaccepted: ",
173 global_zone_page_state(NR_UNACCEPTED));
174#endif
175
176 hugetlb_report_meminfo(m);
177
178 arch_report_meminfo(m);
179
180 return 0;
181}
182
183static int __init proc_meminfo_init(void)
184{
185 struct proc_dir_entry *pde;
186
187 pde = proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
188 pde_make_permanent(pde);
189 return 0;
190}
191fs_initcall(proc_meminfo_init);