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