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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> |
7cd12b4a | 13 | #include <linux/migrate.h> |
82742a3a | 14 | |
edf14cdb VB |
15 | #include "internal.h" |
16 | ||
7cd12b4a VB |
17 | char *migrate_reason_names[MR_TYPES] = { |
18 | "compaction", | |
19 | "memory_failure", | |
20 | "memory_hotplug", | |
21 | "syscall_or_cpuset", | |
22 | "mempolicy_mbind", | |
23 | "numa_misplaced", | |
24 | "cma", | |
25 | }; | |
26 | ||
edf14cdb VB |
27 | const struct trace_print_flags pageflag_names[] = { |
28 | __def_pageflag_names, | |
29 | {0, NULL} | |
30 | }; | |
31 | ||
32 | const struct trace_print_flags gfpflag_names[] = { | |
33 | __def_gfpflag_names, | |
34 | {0, NULL} | |
420adbe9 VB |
35 | }; |
36 | ||
edf14cdb VB |
37 | const struct trace_print_flags vmaflag_names[] = { |
38 | __def_vmaflag_names, | |
39 | {0, NULL} | |
82742a3a SL |
40 | }; |
41 | ||
82742a3a SL |
42 | void dump_page_badflags(struct page *page, const char *reason, |
43 | unsigned long badflags) | |
44 | { | |
53f9263b | 45 | pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx", |
7a82ca0d AM |
46 | page, atomic_read(&page->_count), page_mapcount(page), |
47 | page->mapping, page->index); | |
53f9263b KS |
48 | if (PageCompound(page)) |
49 | pr_cont(" compound_mapcount: %d", compound_mapcount(page)); | |
50 | pr_cont("\n"); | |
edf14cdb | 51 | BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS + 1); |
b8eceeb9 VB |
52 | pr_emerg("flags: %#lx(%pGp)\n", page->flags, &page->flags); |
53 | ||
82742a3a SL |
54 | if (reason) |
55 | pr_alert("page dumped because: %s\n", reason); | |
b8eceeb9 VB |
56 | |
57 | badflags &= page->flags; | |
58 | if (badflags) | |
59 | pr_alert("bad because of flags: %#lx(%pGp)\n", badflags, | |
60 | &badflags); | |
9edad6ea JW |
61 | #ifdef CONFIG_MEMCG |
62 | if (page->mem_cgroup) | |
63 | pr_alert("page->mem_cgroup:%p\n", page->mem_cgroup); | |
64 | #endif | |
82742a3a SL |
65 | } |
66 | ||
67 | void dump_page(struct page *page, const char *reason) | |
68 | { | |
69 | dump_page_badflags(page, reason, 0); | |
70 | } | |
71 | EXPORT_SYMBOL(dump_page); | |
72 | ||
73 | #ifdef CONFIG_DEBUG_VM | |
74 | ||
82742a3a SL |
75 | void dump_vma(const struct vm_area_struct *vma) |
76 | { | |
7a82ca0d | 77 | pr_emerg("vma %p start %p end %p\n" |
82742a3a SL |
78 | "next %p prev %p mm %p\n" |
79 | "prot %lx anon_vma %p vm_ops %p\n" | |
b8eceeb9 VB |
80 | "pgoff %lx file %p private_data %p\n" |
81 | "flags: %#lx(%pGv)\n", | |
82742a3a SL |
82 | vma, (void *)vma->vm_start, (void *)vma->vm_end, vma->vm_next, |
83 | vma->vm_prev, vma->vm_mm, | |
84 | (unsigned long)pgprot_val(vma->vm_page_prot), | |
85 | vma->anon_vma, vma->vm_ops, vma->vm_pgoff, | |
b8eceeb9 VB |
86 | vma->vm_file, vma->vm_private_data, |
87 | vma->vm_flags, &vma->vm_flags); | |
82742a3a SL |
88 | } |
89 | EXPORT_SYMBOL(dump_vma); | |
90 | ||
31c9afa6 SL |
91 | void dump_mm(const struct mm_struct *mm) |
92 | { | |
7a82ca0d | 93 | pr_emerg("mm %p mmap %p seqnum %d task_size %lu\n" |
31c9afa6 SL |
94 | #ifdef CONFIG_MMU |
95 | "get_unmapped_area %p\n" | |
96 | #endif | |
97 | "mmap_base %lu mmap_legacy_base %lu highest_vm_end %lu\n" | |
dc6c9a35 | 98 | "pgd %p mm_users %d mm_count %d nr_ptes %lu nr_pmds %lu map_count %d\n" |
31c9afa6 | 99 | "hiwater_rss %lx hiwater_vm %lx total_vm %lx locked_vm %lx\n" |
84638335 | 100 | "pinned_vm %lx data_vm %lx exec_vm %lx stack_vm %lx\n" |
31c9afa6 SL |
101 | "start_code %lx end_code %lx start_data %lx end_data %lx\n" |
102 | "start_brk %lx brk %lx start_stack %lx\n" | |
103 | "arg_start %lx arg_end %lx env_start %lx env_end %lx\n" | |
104 | "binfmt %p flags %lx core_state %p\n" | |
105 | #ifdef CONFIG_AIO | |
106 | "ioctx_table %p\n" | |
107 | #endif | |
108 | #ifdef CONFIG_MEMCG | |
109 | "owner %p " | |
110 | #endif | |
111 | "exe_file %p\n" | |
112 | #ifdef CONFIG_MMU_NOTIFIER | |
113 | "mmu_notifier_mm %p\n" | |
114 | #endif | |
115 | #ifdef CONFIG_NUMA_BALANCING | |
116 | "numa_next_scan %lu numa_scan_offset %lu numa_scan_seq %d\n" | |
117 | #endif | |
118 | #if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION) | |
119 | "tlb_flush_pending %d\n" | |
120 | #endif | |
b8eceeb9 | 121 | "def_flags: %#lx(%pGv)\n", |
31c9afa6 SL |
122 | |
123 | mm, mm->mmap, mm->vmacache_seqnum, mm->task_size, | |
124 | #ifdef CONFIG_MMU | |
125 | mm->get_unmapped_area, | |
126 | #endif | |
127 | mm->mmap_base, mm->mmap_legacy_base, mm->highest_vm_end, | |
128 | mm->pgd, atomic_read(&mm->mm_users), | |
129 | atomic_read(&mm->mm_count), | |
130 | atomic_long_read((atomic_long_t *)&mm->nr_ptes), | |
dc6c9a35 | 131 | mm_nr_pmds((struct mm_struct *)mm), |
31c9afa6 SL |
132 | mm->map_count, |
133 | mm->hiwater_rss, mm->hiwater_vm, mm->total_vm, mm->locked_vm, | |
84638335 | 134 | mm->pinned_vm, mm->data_vm, mm->exec_vm, mm->stack_vm, |
31c9afa6 SL |
135 | mm->start_code, mm->end_code, mm->start_data, mm->end_data, |
136 | mm->start_brk, mm->brk, mm->start_stack, | |
137 | mm->arg_start, mm->arg_end, mm->env_start, mm->env_end, | |
138 | mm->binfmt, mm->flags, mm->core_state, | |
139 | #ifdef CONFIG_AIO | |
140 | mm->ioctx_table, | |
141 | #endif | |
142 | #ifdef CONFIG_MEMCG | |
143 | mm->owner, | |
144 | #endif | |
145 | mm->exe_file, | |
146 | #ifdef CONFIG_MMU_NOTIFIER | |
147 | mm->mmu_notifier_mm, | |
148 | #endif | |
149 | #ifdef CONFIG_NUMA_BALANCING | |
150 | mm->numa_next_scan, mm->numa_scan_offset, mm->numa_scan_seq, | |
151 | #endif | |
152 | #if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION) | |
153 | mm->tlb_flush_pending, | |
154 | #endif | |
b8eceeb9 VB |
155 | mm->def_flags, &mm->def_flags |
156 | ); | |
31c9afa6 SL |
157 | } |
158 | ||
82742a3a | 159 | #endif /* CONFIG_DEBUG_VM */ |