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/init.h>
3#include <linux/kernel.h>
4#include <linux/mm.h>
5#include <linux/hugetlb.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#ifdef CONFIG_CMA
16#include <linux/cma.h>
17#endif
18#include <asm/page.h>
19#include <asm/pgtable.h>
20#include "internal.h"
21
22void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
23{
24}
25
26static int meminfo_proc_show(struct seq_file *m, void *v)
27{
28 struct sysinfo i;
29 unsigned long committed;
30 long cached;
31 long available;
32 unsigned long pages[NR_LRU_LISTS];
33 int lru;
34
35/*
36 * display in kilobytes.
37 */
38#define K(x) ((x) << (PAGE_SHIFT - 10))
39 si_meminfo(&i);
40 si_swapinfo(&i);
41 committed = percpu_counter_read_positive(&vm_committed_as);
42
43 cached = global_page_state(NR_FILE_PAGES) -
44 total_swapcache_pages() - i.bufferram;
45 if (cached < 0)
46 cached = 0;
47
48 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
49 pages[lru] = global_page_state(NR_LRU_BASE + lru);
50
51 available = si_mem_available();
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 "MemAvailable: %8lu kB\n"
60 "Buffers: %8lu kB\n"
61 "Cached: %8lu kB\n"
62 "SwapCached: %8lu kB\n"
63 "Active: %8lu kB\n"
64 "Inactive: %8lu kB\n"
65 "Active(anon): %8lu kB\n"
66 "Inactive(anon): %8lu kB\n"
67 "Active(file): %8lu kB\n"
68 "Inactive(file): %8lu kB\n"
69 "Unevictable: %8lu kB\n"
70 "Mlocked: %8lu kB\n"
71#ifdef CONFIG_HIGHMEM
72 "HighTotal: %8lu kB\n"
73 "HighFree: %8lu kB\n"
74 "LowTotal: %8lu kB\n"
75 "LowFree: %8lu kB\n"
76#endif
77#ifndef CONFIG_MMU
78 "MmapCopy: %8lu kB\n"
79#endif
80 "SwapTotal: %8lu kB\n"
81 "SwapFree: %8lu kB\n"
82 "Dirty: %8lu kB\n"
83 "Writeback: %8lu kB\n"
84 "AnonPages: %8lu kB\n"
85 "Mapped: %8lu kB\n"
86 "Shmem: %8lu kB\n"
87 "Slab: %8lu kB\n"
88 "SReclaimable: %8lu kB\n"
89 "SUnreclaim: %8lu kB\n"
90 "KernelStack: %8lu kB\n"
91 "PageTables: %8lu kB\n"
92#ifdef CONFIG_QUICKLIST
93 "Quicklists: %8lu kB\n"
94#endif
95 "NFS_Unstable: %8lu kB\n"
96 "Bounce: %8lu kB\n"
97 "WritebackTmp: %8lu kB\n"
98 "CommitLimit: %8lu kB\n"
99 "Committed_AS: %8lu kB\n"
100 "VmallocTotal: %8lu kB\n"
101 "VmallocUsed: %8lu kB\n"
102 "VmallocChunk: %8lu kB\n"
103#ifdef CONFIG_MEMORY_FAILURE
104 "HardwareCorrupted: %5lu kB\n"
105#endif
106#ifdef CONFIG_TRANSPARENT_HUGEPAGE
107 "AnonHugePages: %8lu kB\n"
108#endif
109#ifdef CONFIG_CMA
110 "CmaTotal: %8lu kB\n"
111 "CmaFree: %8lu kB\n"
112#endif
113 ,
114 K(i.totalram),
115 K(i.freeram),
116 K(available),
117 K(i.bufferram),
118 K(cached),
119 K(total_swapcache_pages()),
120 K(pages[LRU_ACTIVE_ANON] + pages[LRU_ACTIVE_FILE]),
121 K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]),
122 K(pages[LRU_ACTIVE_ANON]),
123 K(pages[LRU_INACTIVE_ANON]),
124 K(pages[LRU_ACTIVE_FILE]),
125 K(pages[LRU_INACTIVE_FILE]),
126 K(pages[LRU_UNEVICTABLE]),
127 K(global_page_state(NR_MLOCK)),
128#ifdef CONFIG_HIGHMEM
129 K(i.totalhigh),
130 K(i.freehigh),
131 K(i.totalram-i.totalhigh),
132 K(i.freeram-i.freehigh),
133#endif
134#ifndef CONFIG_MMU
135 K((unsigned long) atomic_long_read(&mmap_pages_allocated)),
136#endif
137 K(i.totalswap),
138 K(i.freeswap),
139 K(global_page_state(NR_FILE_DIRTY)),
140 K(global_page_state(NR_WRITEBACK)),
141 K(global_page_state(NR_ANON_PAGES)),
142 K(global_page_state(NR_FILE_MAPPED)),
143 K(i.sharedram),
144 K(global_page_state(NR_SLAB_RECLAIMABLE) +
145 global_page_state(NR_SLAB_UNRECLAIMABLE)),
146 K(global_page_state(NR_SLAB_RECLAIMABLE)),
147 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
148 global_page_state(NR_KERNEL_STACK) * THREAD_SIZE / 1024,
149 K(global_page_state(NR_PAGETABLE)),
150#ifdef CONFIG_QUICKLIST
151 K(quicklist_total_size()),
152#endif
153 K(global_page_state(NR_UNSTABLE_NFS)),
154 K(global_page_state(NR_BOUNCE)),
155 K(global_page_state(NR_WRITEBACK_TEMP)),
156 K(vm_commit_limit()),
157 K(committed),
158 (unsigned long)VMALLOC_TOTAL >> 10,
159 0ul, // used to be vmalloc 'used'
160 0ul // used to be vmalloc 'largest_chunk'
161#ifdef CONFIG_MEMORY_FAILURE
162 , atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10)
163#endif
164#ifdef CONFIG_TRANSPARENT_HUGEPAGE
165 , K(global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
166 HPAGE_PMD_NR)
167#endif
168#ifdef CONFIG_CMA
169 , K(totalcma_pages)
170 , K(global_page_state(NR_FREE_CMA_PAGES))
171#endif
172 );
173
174 hugetlb_report_meminfo(m);
175
176 arch_report_meminfo(m);
177
178 return 0;
179#undef K
180}
181
182static int meminfo_proc_open(struct inode *inode, struct file *file)
183{
184 return single_open(file, meminfo_proc_show, NULL);
185}
186
187static const struct file_operations meminfo_proc_fops = {
188 .open = meminfo_proc_open,
189 .read = seq_read,
190 .llseek = seq_lseek,
191 .release = single_release,
192};
193
194static int __init proc_meminfo_init(void)
195{
196 proc_create("meminfo", 0, NULL, &meminfo_proc_fops);
197 return 0;
198}
199fs_initcall(proc_meminfo_init);