tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#include <linux/fs.h>
2#include <linux/hugetlb.h>
3#include <linux/init.h>
4#include <linux/kernel.h>
5#include <linux/mm.h>
6#include <linux/mman.h>
7#include <linux/mmzone.h>
8#include <linux/proc_fs.h>
9#include <linux/quicklist.h>
10#include <linux/seq_file.h>
11#include <linux/swap.h>
12#include <linux/vmstat.h>
13#include <linux/atomic.h>
14#include <asm/page.h>
15#include <asm/pgtable.h>
16#include "internal.h"
17
18void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
19{
20}
21
22static int meminfo_proc_show(struct seq_file *m, void *v)
23{
24 struct sysinfo i;
25 unsigned long committed;
26 unsigned long allowed;
27 struct vmalloc_info vmi;
28 long cached;
29 unsigned long pages[NR_LRU_LISTS];
30 int lru;
31
32/*
33 * display in kilobytes.
34 */
35#define K(x) ((x) << (PAGE_SHIFT - 10))
36 si_meminfo(&i);
37 si_swapinfo(&i);
38 committed = percpu_counter_read_positive(&vm_committed_as);
39 allowed = ((totalram_pages - hugetlb_total_pages())
40 * sysctl_overcommit_ratio / 100) + total_swap_pages;
41
42 cached = global_page_state(NR_FILE_PAGES) -
43 total_swapcache_pages - i.bufferram;
44 if (cached < 0)
45 cached = 0;
46
47 get_vmalloc_info(&vmi);
48
49 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
50 pages[lru] = global_page_state(NR_LRU_BASE + lru);
51
52 /*
53 * Tagged format, for easy grepping and expansion.
54 */
55 seq_printf(m,
56 "MemTotal: %8lu kB\n"
57 "MemFree: %8lu kB\n"
58 "Buffers: %8lu kB\n"
59 "Cached: %8lu kB\n"
60 "SwapCached: %8lu kB\n"
61 "Active: %8lu kB\n"
62 "Inactive: %8lu kB\n"
63 "Active(anon): %8lu kB\n"
64 "Inactive(anon): %8lu kB\n"
65 "Active(file): %8lu kB\n"
66 "Inactive(file): %8lu kB\n"
67 "Unevictable: %8lu kB\n"
68 "Mlocked: %8lu kB\n"
69#ifdef CONFIG_HIGHMEM
70 "HighTotal: %8lu kB\n"
71 "HighFree: %8lu kB\n"
72 "LowTotal: %8lu kB\n"
73 "LowFree: %8lu kB\n"
74#endif
75#ifndef CONFIG_MMU
76 "MmapCopy: %8lu kB\n"
77#endif
78 "SwapTotal: %8lu kB\n"
79 "SwapFree: %8lu kB\n"
80 "Dirty: %8lu kB\n"
81 "Writeback: %8lu kB\n"
82 "AnonPages: %8lu kB\n"
83 "Mapped: %8lu kB\n"
84 "Shmem: %8lu kB\n"
85 "Slab: %8lu kB\n"
86 "SReclaimable: %8lu kB\n"
87 "SUnreclaim: %8lu kB\n"
88 "KernelStack: %8lu kB\n"
89 "PageTables: %8lu kB\n"
90#ifdef CONFIG_QUICKLIST
91 "Quicklists: %8lu kB\n"
92#endif
93 "NFS_Unstable: %8lu kB\n"
94 "Bounce: %8lu kB\n"
95 "WritebackTmp: %8lu kB\n"
96 "CommitLimit: %8lu kB\n"
97 "Committed_AS: %8lu kB\n"
98 "VmallocTotal: %8lu kB\n"
99 "VmallocUsed: %8lu kB\n"
100 "VmallocChunk: %8lu kB\n"
101#ifdef CONFIG_MEMORY_FAILURE
102 "HardwareCorrupted: %5lu kB\n"
103#endif
104#ifdef CONFIG_TRANSPARENT_HUGEPAGE
105 "AnonHugePages: %8lu kB\n"
106#endif
107 ,
108 K(i.totalram),
109 K(i.freeram),
110 K(i.bufferram),
111 K(cached),
112 K(total_swapcache_pages),
113 K(pages[LRU_ACTIVE_ANON] + pages[LRU_ACTIVE_FILE]),
114 K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]),
115 K(pages[LRU_ACTIVE_ANON]),
116 K(pages[LRU_INACTIVE_ANON]),
117 K(pages[LRU_ACTIVE_FILE]),
118 K(pages[LRU_INACTIVE_FILE]),
119 K(pages[LRU_UNEVICTABLE]),
120 K(global_page_state(NR_MLOCK)),
121#ifdef CONFIG_HIGHMEM
122 K(i.totalhigh),
123 K(i.freehigh),
124 K(i.totalram-i.totalhigh),
125 K(i.freeram-i.freehigh),
126#endif
127#ifndef CONFIG_MMU
128 K((unsigned long) atomic_long_read(&mmap_pages_allocated)),
129#endif
130 K(i.totalswap),
131 K(i.freeswap),
132 K(global_page_state(NR_FILE_DIRTY)),
133 K(global_page_state(NR_WRITEBACK)),
134 K(global_page_state(NR_ANON_PAGES)
135#ifdef CONFIG_TRANSPARENT_HUGEPAGE
136 + global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
137 HPAGE_PMD_NR
138#endif
139 ),
140 K(global_page_state(NR_FILE_MAPPED)),
141 K(global_page_state(NR_SHMEM)),
142 K(global_page_state(NR_SLAB_RECLAIMABLE) +
143 global_page_state(NR_SLAB_UNRECLAIMABLE)),
144 K(global_page_state(NR_SLAB_RECLAIMABLE)),
145 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
146 global_page_state(NR_KERNEL_STACK) * THREAD_SIZE / 1024,
147 K(global_page_state(NR_PAGETABLE)),
148#ifdef CONFIG_QUICKLIST
149 K(quicklist_total_size()),
150#endif
151 K(global_page_state(NR_UNSTABLE_NFS)),
152 K(global_page_state(NR_BOUNCE)),
153 K(global_page_state(NR_WRITEBACK_TEMP)),
154 K(allowed),
155 K(committed),
156 (unsigned long)VMALLOC_TOTAL >> 10,
157 vmi.used >> 10,
158 vmi.largest_chunk >> 10
159#ifdef CONFIG_MEMORY_FAILURE
160 ,atomic_long_read(&mce_bad_pages) << (PAGE_SHIFT - 10)
161#endif
162#ifdef CONFIG_TRANSPARENT_HUGEPAGE
163 ,K(global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
164 HPAGE_PMD_NR)
165#endif
166 );
167
168 hugetlb_report_meminfo(m);
169
170 arch_report_meminfo(m);
171
172 return 0;
173#undef K
174}
175
176static int meminfo_proc_open(struct inode *inode, struct file *file)
177{
178 return single_open(file, meminfo_proc_show, NULL);
179}
180
181static const struct file_operations meminfo_proc_fops = {
182 .open = meminfo_proc_open,
183 .read = seq_read,
184 .llseek = seq_lseek,
185 .release = single_release,
186};
187
188static int __init proc_meminfo_init(void)
189{
190 proc_create("meminfo", 0, NULL, &meminfo_proc_fops);
191 return 0;
192}
193module_init(proc_meminfo_init);