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Commit | Line | Data |
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31c9afa6 SL |
1 | /* |
2 | * mm/debug.c | |
3 | * | |
4 | * mm/ specific debug routines. | |
5 | * | |
6 | */ | |
7 | ||
82742a3a SL |
8 | #include <linux/kernel.h> |
9 | #include <linux/mm.h> | |
af658dca | 10 | #include <linux/trace_events.h> |
82742a3a | 11 | #include <linux/memcontrol.h> |
420adbe9 | 12 | #include <trace/events/mmflags.h> |
82742a3a | 13 | |
edf14cdb VB |
14 | #include "internal.h" |
15 | ||
16 | const struct trace_print_flags pageflag_names[] = { | |
17 | __def_pageflag_names, | |
18 | {0, NULL} | |
19 | }; | |
20 | ||
21 | const struct trace_print_flags gfpflag_names[] = { | |
22 | __def_gfpflag_names, | |
23 | {0, NULL} | |
420adbe9 VB |
24 | }; |
25 | ||
edf14cdb VB |
26 | const struct trace_print_flags vmaflag_names[] = { |
27 | __def_vmaflag_names, | |
28 | {0, NULL} | |
82742a3a SL |
29 | }; |
30 | ||
31 | static void dump_flags(unsigned long flags, | |
32 | const struct trace_print_flags *names, int count) | |
33 | { | |
34 | const char *delim = ""; | |
35 | unsigned long mask; | |
36 | int i; | |
37 | ||
7a82ca0d | 38 | pr_emerg("flags: %#lx(", flags); |
82742a3a SL |
39 | |
40 | /* remove zone id */ | |
41 | flags &= (1UL << NR_PAGEFLAGS) - 1; | |
42 | ||
43 | for (i = 0; i < count && flags; i++) { | |
44 | ||
45 | mask = names[i].mask; | |
46 | if ((flags & mask) != mask) | |
47 | continue; | |
48 | ||
49 | flags &= ~mask; | |
7a82ca0d | 50 | pr_cont("%s%s", delim, names[i].name); |
82742a3a SL |
51 | delim = "|"; |
52 | } | |
53 | ||
54 | /* check for left over flags */ | |
55 | if (flags) | |
7a82ca0d | 56 | pr_cont("%s%#lx", delim, flags); |
82742a3a | 57 | |
7a82ca0d | 58 | pr_cont(")\n"); |
82742a3a SL |
59 | } |
60 | ||
61 | void dump_page_badflags(struct page *page, const char *reason, | |
62 | unsigned long badflags) | |
63 | { | |
53f9263b | 64 | pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx", |
7a82ca0d AM |
65 | page, atomic_read(&page->_count), page_mapcount(page), |
66 | page->mapping, page->index); | |
53f9263b KS |
67 | if (PageCompound(page)) |
68 | pr_cont(" compound_mapcount: %d", compound_mapcount(page)); | |
69 | pr_cont("\n"); | |
edf14cdb VB |
70 | BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS + 1); |
71 | dump_flags(page->flags, pageflag_names, | |
72 | ARRAY_SIZE(pageflag_names) - 1); | |
82742a3a SL |
73 | if (reason) |
74 | pr_alert("page dumped because: %s\n", reason); | |
75 | if (page->flags & badflags) { | |
76 | pr_alert("bad because of flags:\n"); | |
edf14cdb VB |
77 | dump_flags(page->flags & badflags, pageflag_names, |
78 | ARRAY_SIZE(pageflag_names) - 1); | |
82742a3a | 79 | } |
9edad6ea JW |
80 | #ifdef CONFIG_MEMCG |
81 | if (page->mem_cgroup) | |
82 | pr_alert("page->mem_cgroup:%p\n", page->mem_cgroup); | |
83 | #endif | |
82742a3a SL |
84 | } |
85 | ||
86 | void dump_page(struct page *page, const char *reason) | |
87 | { | |
88 | dump_page_badflags(page, reason, 0); | |
89 | } | |
90 | EXPORT_SYMBOL(dump_page); | |
91 | ||
92 | #ifdef CONFIG_DEBUG_VM | |
93 | ||
82742a3a SL |
94 | void dump_vma(const struct vm_area_struct *vma) |
95 | { | |
7a82ca0d | 96 | pr_emerg("vma %p start %p end %p\n" |
82742a3a SL |
97 | "next %p prev %p mm %p\n" |
98 | "prot %lx anon_vma %p vm_ops %p\n" | |
99 | "pgoff %lx file %p private_data %p\n", | |
100 | vma, (void *)vma->vm_start, (void *)vma->vm_end, vma->vm_next, | |
101 | vma->vm_prev, vma->vm_mm, | |
102 | (unsigned long)pgprot_val(vma->vm_page_prot), | |
103 | vma->anon_vma, vma->vm_ops, vma->vm_pgoff, | |
104 | vma->vm_file, vma->vm_private_data); | |
edf14cdb | 105 | dump_flags(vma->vm_flags, vmaflag_names, ARRAY_SIZE(vmaflag_names) - 1); |
82742a3a SL |
106 | } |
107 | EXPORT_SYMBOL(dump_vma); | |
108 | ||
31c9afa6 SL |
109 | void dump_mm(const struct mm_struct *mm) |
110 | { | |
7a82ca0d | 111 | pr_emerg("mm %p mmap %p seqnum %d task_size %lu\n" |
31c9afa6 SL |
112 | #ifdef CONFIG_MMU |
113 | "get_unmapped_area %p\n" | |
114 | #endif | |
115 | "mmap_base %lu mmap_legacy_base %lu highest_vm_end %lu\n" | |
dc6c9a35 | 116 | "pgd %p mm_users %d mm_count %d nr_ptes %lu nr_pmds %lu map_count %d\n" |
31c9afa6 | 117 | "hiwater_rss %lx hiwater_vm %lx total_vm %lx locked_vm %lx\n" |
84638335 | 118 | "pinned_vm %lx data_vm %lx exec_vm %lx stack_vm %lx\n" |
31c9afa6 SL |
119 | "start_code %lx end_code %lx start_data %lx end_data %lx\n" |
120 | "start_brk %lx brk %lx start_stack %lx\n" | |
121 | "arg_start %lx arg_end %lx env_start %lx env_end %lx\n" | |
122 | "binfmt %p flags %lx core_state %p\n" | |
123 | #ifdef CONFIG_AIO | |
124 | "ioctx_table %p\n" | |
125 | #endif | |
126 | #ifdef CONFIG_MEMCG | |
127 | "owner %p " | |
128 | #endif | |
129 | "exe_file %p\n" | |
130 | #ifdef CONFIG_MMU_NOTIFIER | |
131 | "mmu_notifier_mm %p\n" | |
132 | #endif | |
133 | #ifdef CONFIG_NUMA_BALANCING | |
134 | "numa_next_scan %lu numa_scan_offset %lu numa_scan_seq %d\n" | |
135 | #endif | |
136 | #if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION) | |
137 | "tlb_flush_pending %d\n" | |
138 | #endif | |
139 | "%s", /* This is here to hold the comma */ | |
140 | ||
141 | mm, mm->mmap, mm->vmacache_seqnum, mm->task_size, | |
142 | #ifdef CONFIG_MMU | |
143 | mm->get_unmapped_area, | |
144 | #endif | |
145 | mm->mmap_base, mm->mmap_legacy_base, mm->highest_vm_end, | |
146 | mm->pgd, atomic_read(&mm->mm_users), | |
147 | atomic_read(&mm->mm_count), | |
148 | atomic_long_read((atomic_long_t *)&mm->nr_ptes), | |
dc6c9a35 | 149 | mm_nr_pmds((struct mm_struct *)mm), |
31c9afa6 SL |
150 | mm->map_count, |
151 | mm->hiwater_rss, mm->hiwater_vm, mm->total_vm, mm->locked_vm, | |
84638335 | 152 | mm->pinned_vm, mm->data_vm, mm->exec_vm, mm->stack_vm, |
31c9afa6 SL |
153 | mm->start_code, mm->end_code, mm->start_data, mm->end_data, |
154 | mm->start_brk, mm->brk, mm->start_stack, | |
155 | mm->arg_start, mm->arg_end, mm->env_start, mm->env_end, | |
156 | mm->binfmt, mm->flags, mm->core_state, | |
157 | #ifdef CONFIG_AIO | |
158 | mm->ioctx_table, | |
159 | #endif | |
160 | #ifdef CONFIG_MEMCG | |
161 | mm->owner, | |
162 | #endif | |
163 | mm->exe_file, | |
164 | #ifdef CONFIG_MMU_NOTIFIER | |
165 | mm->mmu_notifier_mm, | |
166 | #endif | |
167 | #ifdef CONFIG_NUMA_BALANCING | |
168 | mm->numa_next_scan, mm->numa_scan_offset, mm->numa_scan_seq, | |
169 | #endif | |
170 | #if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION) | |
171 | mm->tlb_flush_pending, | |
172 | #endif | |
173 | "" /* This is here to not have a comma! */ | |
174 | ); | |
175 | ||
420adbe9 | 176 | dump_flags(mm->def_flags, vmaflag_names, |
edf14cdb | 177 | ARRAY_SIZE(vmaflag_names) - 1); |
31c9afa6 SL |
178 | } |
179 | ||
82742a3a | 180 | #endif /* CONFIG_DEBUG_VM */ |