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/proc_fs.h>
10#include <linux/quicklist.h>
11#include <linux/seq_file.h>
12#include <linux/swap.h>
13#include <linux/vmstat.h>
14#include <linux/atomic.h>
15#include <linux/vmalloc.h>
16#ifdef CONFIG_CMA
17#include <linux/cma.h>
18#endif
19#include <asm/page.h>
20#include <asm/pgtable.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 int lru;
41
42 si_meminfo(&i);
43 si_swapinfo(&i);
44 committed = percpu_counter_read_positive(&vm_committed_as);
45
46 cached = global_node_page_state(NR_FILE_PAGES) -
47 total_swapcache_pages() - i.bufferram;
48 if (cached < 0)
49 cached = 0;
50
51 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
52 pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
53
54 available = si_mem_available();
55
56 show_val_kb(m, "MemTotal: ", i.totalram);
57 show_val_kb(m, "MemFree: ", i.freeram);
58 show_val_kb(m, "MemAvailable: ", available);
59 show_val_kb(m, "Buffers: ", i.bufferram);
60 show_val_kb(m, "Cached: ", cached);
61 show_val_kb(m, "SwapCached: ", total_swapcache_pages());
62 show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] +
63 pages[LRU_ACTIVE_FILE]);
64 show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] +
65 pages[LRU_INACTIVE_FILE]);
66 show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]);
67 show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
68 show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]);
69 show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
70 show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]);
71 show_val_kb(m, "Mlocked: ", global_zone_page_state(NR_MLOCK));
72
73#ifdef CONFIG_HIGHMEM
74 show_val_kb(m, "HighTotal: ", i.totalhigh);
75 show_val_kb(m, "HighFree: ", i.freehigh);
76 show_val_kb(m, "LowTotal: ", i.totalram - i.totalhigh);
77 show_val_kb(m, "LowFree: ", i.freeram - i.freehigh);
78#endif
79
80#ifndef CONFIG_MMU
81 show_val_kb(m, "MmapCopy: ",
82 (unsigned long)atomic_long_read(&mmap_pages_allocated));
83#endif
84
85 show_val_kb(m, "SwapTotal: ", i.totalswap);
86 show_val_kb(m, "SwapFree: ", i.freeswap);
87 show_val_kb(m, "Dirty: ",
88 global_node_page_state(NR_FILE_DIRTY));
89 show_val_kb(m, "Writeback: ",
90 global_node_page_state(NR_WRITEBACK));
91 show_val_kb(m, "AnonPages: ",
92 global_node_page_state(NR_ANON_MAPPED));
93 show_val_kb(m, "Mapped: ",
94 global_node_page_state(NR_FILE_MAPPED));
95 show_val_kb(m, "Shmem: ", i.sharedram);
96 show_val_kb(m, "Slab: ",
97 global_node_page_state(NR_SLAB_RECLAIMABLE) +
98 global_node_page_state(NR_SLAB_UNRECLAIMABLE));
99
100 show_val_kb(m, "SReclaimable: ",
101 global_node_page_state(NR_SLAB_RECLAIMABLE));
102 show_val_kb(m, "SUnreclaim: ",
103 global_node_page_state(NR_SLAB_UNRECLAIMABLE));
104 seq_printf(m, "KernelStack: %8lu kB\n",
105 global_zone_page_state(NR_KERNEL_STACK_KB));
106 show_val_kb(m, "PageTables: ",
107 global_zone_page_state(NR_PAGETABLE));
108#ifdef CONFIG_QUICKLIST
109 show_val_kb(m, "Quicklists: ", quicklist_total_size());
110#endif
111
112 show_val_kb(m, "NFS_Unstable: ",
113 global_node_page_state(NR_UNSTABLE_NFS));
114 show_val_kb(m, "Bounce: ",
115 global_zone_page_state(NR_BOUNCE));
116 show_val_kb(m, "WritebackTmp: ",
117 global_node_page_state(NR_WRITEBACK_TEMP));
118 show_val_kb(m, "CommitLimit: ", vm_commit_limit());
119 show_val_kb(m, "Committed_AS: ", committed);
120 seq_printf(m, "VmallocTotal: %8lu kB\n",
121 (unsigned long)VMALLOC_TOTAL >> 10);
122 show_val_kb(m, "VmallocUsed: ", 0ul);
123 show_val_kb(m, "VmallocChunk: ", 0ul);
124
125#ifdef CONFIG_MEMORY_FAILURE
126 seq_printf(m, "HardwareCorrupted: %5lu kB\n",
127 atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
128#endif
129
130#ifdef CONFIG_TRANSPARENT_HUGEPAGE
131 show_val_kb(m, "AnonHugePages: ",
132 global_node_page_state(NR_ANON_THPS) * HPAGE_PMD_NR);
133 show_val_kb(m, "ShmemHugePages: ",
134 global_node_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR);
135 show_val_kb(m, "ShmemPmdMapped: ",
136 global_node_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR);
137#endif
138
139#ifdef CONFIG_CMA
140 show_val_kb(m, "CmaTotal: ", totalcma_pages);
141 show_val_kb(m, "CmaFree: ",
142 global_zone_page_state(NR_FREE_CMA_PAGES));
143#endif
144
145 hugetlb_report_meminfo(m);
146
147 arch_report_meminfo(m);
148
149 return 0;
150}
151
152static int __init proc_meminfo_init(void)
153{
154 proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
155 return 0;
156}
157fs_initcall(proc_meminfo_init);