edda898714eb7bb23585241dc6631800c6ba1dfb
[muen/linux.git] / fs / proc / meminfo.c
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/percpu.h>
11 #include <linux/quicklist.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 <asm/pgtable.h>
22 #include "internal.h"
23
24 void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
25 {
26 }
27
28 static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
29 {
30         seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8);
31         seq_write(m, " kB\n", 4);
32 }
33
34 static int meminfo_proc_show(struct seq_file *m, void *v)
35 {
36         struct sysinfo i;
37         unsigned long committed;
38         long cached;
39         long available;
40         unsigned long pages[NR_LRU_LISTS];
41         int lru;
42
43         si_meminfo(&i);
44         si_swapinfo(&i);
45         committed = percpu_counter_read_positive(&vm_committed_as);
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
57         show_val_kb(m, "MemTotal:       ", i.totalram);
58         show_val_kb(m, "MemFree:        ", i.freeram);
59         show_val_kb(m, "MemAvailable:   ", available);
60         show_val_kb(m, "Buffers:        ", i.bufferram);
61         show_val_kb(m, "Cached:         ", cached);
62         show_val_kb(m, "SwapCached:     ", total_swapcache_pages());
63         show_val_kb(m, "Active:         ", pages[LRU_ACTIVE_ANON] +
64                                            pages[LRU_ACTIVE_FILE]);
65         show_val_kb(m, "Inactive:       ", pages[LRU_INACTIVE_ANON] +
66                                            pages[LRU_INACTIVE_FILE]);
67         show_val_kb(m, "Active(anon):   ", pages[LRU_ACTIVE_ANON]);
68         show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
69         show_val_kb(m, "Active(file):   ", pages[LRU_ACTIVE_FILE]);
70         show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
71         show_val_kb(m, "Unevictable:    ", pages[LRU_UNEVICTABLE]);
72         show_val_kb(m, "Mlocked:        ", global_zone_page_state(NR_MLOCK));
73
74 #ifdef CONFIG_HIGHMEM
75         show_val_kb(m, "HighTotal:      ", i.totalhigh);
76         show_val_kb(m, "HighFree:       ", i.freehigh);
77         show_val_kb(m, "LowTotal:       ", i.totalram - i.totalhigh);
78         show_val_kb(m, "LowFree:        ", i.freeram - i.freehigh);
79 #endif
80
81 #ifndef CONFIG_MMU
82         show_val_kb(m, "MmapCopy:       ",
83                     (unsigned long)atomic_long_read(&mmap_pages_allocated));
84 #endif
85
86         show_val_kb(m, "SwapTotal:      ", i.totalswap);
87         show_val_kb(m, "SwapFree:       ", i.freeswap);
88         show_val_kb(m, "Dirty:          ",
89                     global_node_page_state(NR_FILE_DIRTY));
90         show_val_kb(m, "Writeback:      ",
91                     global_node_page_state(NR_WRITEBACK));
92         show_val_kb(m, "AnonPages:      ",
93                     global_node_page_state(NR_ANON_MAPPED));
94         show_val_kb(m, "Mapped:         ",
95                     global_node_page_state(NR_FILE_MAPPED));
96         show_val_kb(m, "Shmem:          ", i.sharedram);
97         show_val_kb(m, "Slab:           ",
98                     global_node_page_state(NR_SLAB_RECLAIMABLE) +
99                     global_node_page_state(NR_SLAB_UNRECLAIMABLE));
100
101         show_val_kb(m, "SReclaimable:   ",
102                     global_node_page_state(NR_SLAB_RECLAIMABLE));
103         show_val_kb(m, "SUnreclaim:     ",
104                     global_node_page_state(NR_SLAB_UNRECLAIMABLE));
105         seq_printf(m, "KernelStack:    %8lu kB\n",
106                    global_zone_page_state(NR_KERNEL_STACK_KB));
107         show_val_kb(m, "PageTables:     ",
108                     global_zone_page_state(NR_PAGETABLE));
109 #ifdef CONFIG_QUICKLIST
110         show_val_kb(m, "Quicklists:     ", quicklist_total_size());
111 #endif
112
113         show_val_kb(m, "NFS_Unstable:   ",
114                     global_node_page_state(NR_UNSTABLE_NFS));
115         show_val_kb(m, "Bounce:         ",
116                     global_zone_page_state(NR_BOUNCE));
117         show_val_kb(m, "WritebackTmp:   ",
118                     global_node_page_state(NR_WRITEBACK_TEMP));
119         show_val_kb(m, "CommitLimit:    ", vm_commit_limit());
120         show_val_kb(m, "Committed_AS:   ", committed);
121         seq_printf(m, "VmallocTotal:   %8lu kB\n",
122                    (unsigned long)VMALLOC_TOTAL >> 10);
123         show_val_kb(m, "VmallocUsed:    ", 0ul);
124         show_val_kb(m, "VmallocChunk:   ", 0ul);
125         show_val_kb(m, "Percpu:         ", pcpu_nr_pages());
126
127 #ifdef CONFIG_MEMORY_FAILURE
128         seq_printf(m, "HardwareCorrupted: %5lu kB\n",
129                    atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
130 #endif
131
132 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
133         show_val_kb(m, "AnonHugePages:  ",
134                     global_node_page_state(NR_ANON_THPS) * HPAGE_PMD_NR);
135         show_val_kb(m, "ShmemHugePages: ",
136                     global_node_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR);
137         show_val_kb(m, "ShmemPmdMapped: ",
138                     global_node_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR);
139 #endif
140
141 #ifdef CONFIG_CMA
142         show_val_kb(m, "CmaTotal:       ", totalcma_pages);
143         show_val_kb(m, "CmaFree:        ",
144                     global_zone_page_state(NR_FREE_CMA_PAGES));
145 #endif
146
147         hugetlb_report_meminfo(m);
148
149         arch_report_meminfo(m);
150
151         return 0;
152 }
153
154 static int __init proc_meminfo_init(void)
155 {
156         proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
157         return 0;
158 }
159 fs_initcall(proc_meminfo_init);