Merge tag 'for-5.12/io_uring-2021-02-25' of git://git.kernel.dk/linux-block
[linux-2.6-microblaze.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/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 "internal.h"
21
22 void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
23 {
24 }
25
26 static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
27 {
28         seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8);
29         seq_write(m, " kB\n", 4);
30 }
31
32 static int meminfo_proc_show(struct seq_file *m, void *v)
33 {
34         struct sysinfo i;
35         unsigned long committed;
36         long cached;
37         long available;
38         unsigned long pages[NR_LRU_LISTS];
39         unsigned long sreclaimable, sunreclaim;
40         int lru;
41
42         si_meminfo(&i);
43         si_swapinfo(&i);
44         committed = vm_memory_committed();
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         sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B);
56         sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B);
57
58         show_val_kb(m, "MemTotal:       ", i.totalram);
59         show_val_kb(m, "MemFree:        ", i.freeram);
60         show_val_kb(m, "MemAvailable:   ", available);
61         show_val_kb(m, "Buffers:        ", i.bufferram);
62         show_val_kb(m, "Cached:         ", cached);
63         show_val_kb(m, "SwapCached:     ", total_swapcache_pages());
64         show_val_kb(m, "Active:         ", pages[LRU_ACTIVE_ANON] +
65                                            pages[LRU_ACTIVE_FILE]);
66         show_val_kb(m, "Inactive:       ", pages[LRU_INACTIVE_ANON] +
67                                            pages[LRU_INACTIVE_FILE]);
68         show_val_kb(m, "Active(anon):   ", pages[LRU_ACTIVE_ANON]);
69         show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
70         show_val_kb(m, "Active(file):   ", pages[LRU_ACTIVE_FILE]);
71         show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
72         show_val_kb(m, "Unevictable:    ", pages[LRU_UNEVICTABLE]);
73         show_val_kb(m, "Mlocked:        ", global_zone_page_state(NR_MLOCK));
74
75 #ifdef CONFIG_HIGHMEM
76         show_val_kb(m, "HighTotal:      ", i.totalhigh);
77         show_val_kb(m, "HighFree:       ", i.freehigh);
78         show_val_kb(m, "LowTotal:       ", i.totalram - i.totalhigh);
79         show_val_kb(m, "LowFree:        ", i.freeram - i.freehigh);
80 #endif
81
82 #ifndef CONFIG_MMU
83         show_val_kb(m, "MmapCopy:       ",
84                     (unsigned long)atomic_long_read(&mmap_pages_allocated));
85 #endif
86
87         show_val_kb(m, "SwapTotal:      ", i.totalswap);
88         show_val_kb(m, "SwapFree:       ", i.freeswap);
89         show_val_kb(m, "Dirty:          ",
90                     global_node_page_state(NR_FILE_DIRTY));
91         show_val_kb(m, "Writeback:      ",
92                     global_node_page_state(NR_WRITEBACK));
93         show_val_kb(m, "AnonPages:      ",
94                     global_node_page_state(NR_ANON_MAPPED));
95         show_val_kb(m, "Mapped:         ",
96                     global_node_page_state(NR_FILE_MAPPED));
97         show_val_kb(m, "Shmem:          ", i.sharedram);
98         show_val_kb(m, "KReclaimable:   ", sreclaimable +
99                     global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
100         show_val_kb(m, "Slab:           ", sreclaimable + sunreclaim);
101         show_val_kb(m, "SReclaimable:   ", sreclaimable);
102         show_val_kb(m, "SUnreclaim:     ", sunreclaim);
103         seq_printf(m, "KernelStack:    %8lu kB\n",
104                    global_node_page_state(NR_KERNEL_STACK_KB));
105 #ifdef CONFIG_SHADOW_CALL_STACK
106         seq_printf(m, "ShadowCallStack:%8lu kB\n",
107                    global_node_page_state(NR_KERNEL_SCS_KB));
108 #endif
109         show_val_kb(m, "PageTables:     ",
110                     global_node_page_state(NR_PAGETABLE));
111
112         show_val_kb(m, "NFS_Unstable:   ", 0);
113         show_val_kb(m, "Bounce:         ",
114                     global_zone_page_state(NR_BOUNCE));
115         show_val_kb(m, "WritebackTmp:   ",
116                     global_node_page_state(NR_WRITEBACK_TEMP));
117         show_val_kb(m, "CommitLimit:    ", vm_commit_limit());
118         show_val_kb(m, "Committed_AS:   ", committed);
119         seq_printf(m, "VmallocTotal:   %8lu kB\n",
120                    (unsigned long)VMALLOC_TOTAL >> 10);
121         show_val_kb(m, "VmallocUsed:    ", vmalloc_nr_pages());
122         show_val_kb(m, "VmallocChunk:   ", 0ul);
123         show_val_kb(m, "Percpu:         ", pcpu_nr_pages());
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));
133         show_val_kb(m, "ShmemHugePages: ",
134                     global_node_page_state(NR_SHMEM_THPS));
135         show_val_kb(m, "ShmemPmdMapped: ",
136                     global_node_page_state(NR_SHMEM_PMDMAPPED));
137         show_val_kb(m, "FileHugePages:  ",
138                     global_node_page_state(NR_FILE_THPS));
139         show_val_kb(m, "FilePmdMapped:  ",
140                     global_node_page_state(NR_FILE_PMDMAPPED));
141 #endif
142
143 #ifdef CONFIG_CMA
144         show_val_kb(m, "CmaTotal:       ", totalcma_pages);
145         show_val_kb(m, "CmaFree:        ",
146                     global_zone_page_state(NR_FREE_CMA_PAGES));
147 #endif
148
149         hugetlb_report_meminfo(m);
150
151         arch_report_meminfo(m);
152
153         return 0;
154 }
155
156 static int __init proc_meminfo_init(void)
157 {
158         proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
159         return 0;
160 }
161 fs_initcall(proc_meminfo_init);