xref: /openbmc/linux/fs/proc/meminfo.c (revision 3f32c49e)
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/memblock.h>
10 #include <linux/proc_fs.h>
11 #include <linux/percpu.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 <linux/zswap.h>
21 #include <asm/page.h>
22 #include "internal.h"
23 
arch_report_meminfo(struct seq_file * m)24 void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
25 {
26 }
27 
show_val_kb(struct seq_file * m,const char * s,unsigned long num)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 
meminfo_proc_show(struct seq_file * m,void * v)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 	unsigned long sreclaimable, sunreclaim;
42 	int lru;
43 
44 	si_meminfo(&i);
45 	si_swapinfo(&i);
46 	committed = vm_memory_committed();
47 
48 	cached = global_node_page_state(NR_FILE_PAGES) -
49 			total_swapcache_pages() - i.bufferram;
50 	if (cached < 0)
51 		cached = 0;
52 
53 	for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
54 		pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
55 
56 	available = si_mem_available();
57 	sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B);
58 	sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B);
59 
60 	show_val_kb(m, "MemTotal:       ", i.totalram);
61 	show_val_kb(m, "MemFree:        ", i.freeram);
62 	show_val_kb(m, "MemAvailable:   ", available);
63 	show_val_kb(m, "Buffers:        ", i.bufferram);
64 	show_val_kb(m, "Cached:         ", cached);
65 	show_val_kb(m, "SwapCached:     ", total_swapcache_pages());
66 	show_val_kb(m, "Active:         ", pages[LRU_ACTIVE_ANON] +
67 					   pages[LRU_ACTIVE_FILE]);
68 	show_val_kb(m, "Inactive:       ", pages[LRU_INACTIVE_ANON] +
69 					   pages[LRU_INACTIVE_FILE]);
70 	show_val_kb(m, "Active(anon):   ", pages[LRU_ACTIVE_ANON]);
71 	show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
72 	show_val_kb(m, "Active(file):   ", pages[LRU_ACTIVE_FILE]);
73 	show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
74 	show_val_kb(m, "Unevictable:    ", pages[LRU_UNEVICTABLE]);
75 	show_val_kb(m, "Mlocked:        ", global_zone_page_state(NR_MLOCK));
76 
77 #ifdef CONFIG_HIGHMEM
78 	show_val_kb(m, "HighTotal:      ", i.totalhigh);
79 	show_val_kb(m, "HighFree:       ", i.freehigh);
80 	show_val_kb(m, "LowTotal:       ", i.totalram - i.totalhigh);
81 	show_val_kb(m, "LowFree:        ", i.freeram - i.freehigh);
82 #endif
83 
84 #ifndef CONFIG_MMU
85 	show_val_kb(m, "MmapCopy:       ",
86 		    (unsigned long)atomic_long_read(&mmap_pages_allocated));
87 #endif
88 
89 	show_val_kb(m, "SwapTotal:      ", i.totalswap);
90 	show_val_kb(m, "SwapFree:       ", i.freeswap);
91 #ifdef CONFIG_ZSWAP
92 	seq_printf(m,  "Zswap:          %8lu kB\n",
93 		   (unsigned long)(zswap_pool_total_size >> 10));
94 	seq_printf(m,  "Zswapped:       %8lu kB\n",
95 		   (unsigned long)atomic_read(&zswap_stored_pages) <<
96 		   (PAGE_SHIFT - 10));
97 #endif
98 	show_val_kb(m, "Dirty:          ",
99 		    global_node_page_state(NR_FILE_DIRTY));
100 	show_val_kb(m, "Writeback:      ",
101 		    global_node_page_state(NR_WRITEBACK));
102 	show_val_kb(m, "AnonPages:      ",
103 		    global_node_page_state(NR_ANON_MAPPED));
104 	show_val_kb(m, "Mapped:         ",
105 		    global_node_page_state(NR_FILE_MAPPED));
106 	show_val_kb(m, "Shmem:          ", i.sharedram);
107 	show_val_kb(m, "KReclaimable:   ", sreclaimable +
108 		    global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
109 	show_val_kb(m, "Slab:           ", sreclaimable + sunreclaim);
110 	show_val_kb(m, "SReclaimable:   ", sreclaimable);
111 	show_val_kb(m, "SUnreclaim:     ", sunreclaim);
112 	seq_printf(m, "KernelStack:    %8lu kB\n",
113 		   global_node_page_state(NR_KERNEL_STACK_KB));
114 #ifdef CONFIG_SHADOW_CALL_STACK
115 	seq_printf(m, "ShadowCallStack:%8lu kB\n",
116 		   global_node_page_state(NR_KERNEL_SCS_KB));
117 #endif
118 	show_val_kb(m, "PageTables:     ",
119 		    global_node_page_state(NR_PAGETABLE));
120 	show_val_kb(m, "SecPageTables:  ",
121 		    global_node_page_state(NR_SECONDARY_PAGETABLE));
122 
123 	show_val_kb(m, "NFS_Unstable:   ", 0);
124 	show_val_kb(m, "Bounce:         ",
125 		    global_zone_page_state(NR_BOUNCE));
126 	show_val_kb(m, "WritebackTmp:   ",
127 		    global_node_page_state(NR_WRITEBACK_TEMP));
128 	show_val_kb(m, "CommitLimit:    ", vm_commit_limit());
129 	show_val_kb(m, "Committed_AS:   ", committed);
130 	seq_printf(m, "VmallocTotal:   %8lu kB\n",
131 		   (unsigned long)VMALLOC_TOTAL >> 10);
132 	show_val_kb(m, "VmallocUsed:    ", vmalloc_nr_pages());
133 	show_val_kb(m, "VmallocChunk:   ", 0ul);
134 	show_val_kb(m, "Percpu:         ", pcpu_nr_pages());
135 
136 	memtest_report_meminfo(m);
137 
138 #ifdef CONFIG_MEMORY_FAILURE
139 	seq_printf(m, "HardwareCorrupted: %5lu kB\n",
140 		   atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
141 #endif
142 
143 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
144 	show_val_kb(m, "AnonHugePages:  ",
145 		    global_node_page_state(NR_ANON_THPS));
146 	show_val_kb(m, "ShmemHugePages: ",
147 		    global_node_page_state(NR_SHMEM_THPS));
148 	show_val_kb(m, "ShmemPmdMapped: ",
149 		    global_node_page_state(NR_SHMEM_PMDMAPPED));
150 	show_val_kb(m, "FileHugePages:  ",
151 		    global_node_page_state(NR_FILE_THPS));
152 	show_val_kb(m, "FilePmdMapped:  ",
153 		    global_node_page_state(NR_FILE_PMDMAPPED));
154 #endif
155 
156 #ifdef CONFIG_CMA
157 	show_val_kb(m, "CmaTotal:       ", totalcma_pages);
158 	show_val_kb(m, "CmaFree:        ",
159 		    global_zone_page_state(NR_FREE_CMA_PAGES));
160 #endif
161 
162 #ifdef CONFIG_UNACCEPTED_MEMORY
163 	show_val_kb(m, "Unaccepted:     ",
164 		    global_zone_page_state(NR_UNACCEPTED));
165 #endif
166 
167 	hugetlb_report_meminfo(m);
168 
169 	arch_report_meminfo(m);
170 
171 	return 0;
172 }
173 
proc_meminfo_init(void)174 static int __init proc_meminfo_init(void)
175 {
176 	struct proc_dir_entry *pde;
177 
178 	pde = proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
179 	pde_make_permanent(pde);
180 	return 0;
181 }
182 fs_initcall(proc_meminfo_init);
183