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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> |
4e462112 | 14 | #include <linux/page_owner.h> |
82742a3a | 15 | |
edf14cdb VB |
16 | #include "internal.h" |
17 | ||
7cd12b4a VB |
18 | char *migrate_reason_names[MR_TYPES] = { |
19 | "compaction", | |
20 | "memory_failure", | |
21 | "memory_hotplug", | |
22 | "syscall_or_cpuset", | |
23 | "mempolicy_mbind", | |
24 | "numa_misplaced", | |
25 | "cma", | |
26 | }; | |
27 | ||
edf14cdb VB |
28 | const struct trace_print_flags pageflag_names[] = { |
29 | __def_pageflag_names, | |
30 | {0, NULL} | |
31 | }; | |
32 | ||
33 | const struct trace_print_flags gfpflag_names[] = { | |
34 | __def_gfpflag_names, | |
35 | {0, NULL} | |
420adbe9 VB |
36 | }; |
37 | ||
edf14cdb VB |
38 | const struct trace_print_flags vmaflag_names[] = { |
39 | __def_vmaflag_names, | |
40 | {0, NULL} | |
82742a3a SL |
41 | }; |
42 | ||
82742a3a SL |
43 | void dump_page_badflags(struct page *page, const char *reason, |
44 | unsigned long badflags) | |
45 | { | |
53f9263b | 46 | pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx", |
7a82ca0d AM |
47 | page, atomic_read(&page->_count), page_mapcount(page), |
48 | page->mapping, page->index); | |
53f9263b KS |
49 | if (PageCompound(page)) |
50 | pr_cont(" compound_mapcount: %d", compound_mapcount(page)); | |
51 | pr_cont("\n"); | |
edf14cdb | 52 | BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS + 1); |
b8eceeb9 VB |
53 | pr_emerg("flags: %#lx(%pGp)\n", page->flags, &page->flags); |
54 | ||
82742a3a SL |
55 | if (reason) |
56 | pr_alert("page dumped because: %s\n", reason); | |
b8eceeb9 VB |
57 | |
58 | badflags &= page->flags; | |
59 | if (badflags) | |
60 | pr_alert("bad because of flags: %#lx(%pGp)\n", badflags, | |
61 | &badflags); | |
9edad6ea JW |
62 | #ifdef CONFIG_MEMCG |
63 | if (page->mem_cgroup) | |
64 | pr_alert("page->mem_cgroup:%p\n", page->mem_cgroup); | |
65 | #endif | |
82742a3a SL |
66 | } |
67 | ||
68 | void dump_page(struct page *page, const char *reason) | |
69 | { | |
70 | dump_page_badflags(page, reason, 0); | |
4e462112 | 71 | dump_page_owner(page); |
82742a3a SL |
72 | } |
73 | EXPORT_SYMBOL(dump_page); | |
74 | ||
75 | #ifdef CONFIG_DEBUG_VM | |
76 | ||
82742a3a SL |
77 | void dump_vma(const struct vm_area_struct *vma) |
78 | { | |
7a82ca0d | 79 | pr_emerg("vma %p start %p end %p\n" |
82742a3a SL |
80 | "next %p prev %p mm %p\n" |
81 | "prot %lx anon_vma %p vm_ops %p\n" | |
b8eceeb9 VB |
82 | "pgoff %lx file %p private_data %p\n" |
83 | "flags: %#lx(%pGv)\n", | |
82742a3a SL |
84 | vma, (void *)vma->vm_start, (void *)vma->vm_end, vma->vm_next, |
85 | vma->vm_prev, vma->vm_mm, | |
86 | (unsigned long)pgprot_val(vma->vm_page_prot), | |
87 | vma->anon_vma, vma->vm_ops, vma->vm_pgoff, | |
b8eceeb9 VB |
88 | vma->vm_file, vma->vm_private_data, |
89 | vma->vm_flags, &vma->vm_flags); | |
82742a3a SL |
90 | } |
91 | EXPORT_SYMBOL(dump_vma); | |
92 | ||
31c9afa6 SL |
93 | void dump_mm(const struct mm_struct *mm) |
94 | { | |
7a82ca0d | 95 | pr_emerg("mm %p mmap %p seqnum %d task_size %lu\n" |
31c9afa6 SL |
96 | #ifdef CONFIG_MMU |
97 | "get_unmapped_area %p\n" | |
98 | #endif | |
99 | "mmap_base %lu mmap_legacy_base %lu highest_vm_end %lu\n" | |
dc6c9a35 | 100 | "pgd %p mm_users %d mm_count %d nr_ptes %lu nr_pmds %lu map_count %d\n" |
31c9afa6 | 101 | "hiwater_rss %lx hiwater_vm %lx total_vm %lx locked_vm %lx\n" |
84638335 | 102 | "pinned_vm %lx data_vm %lx exec_vm %lx stack_vm %lx\n" |
31c9afa6 SL |
103 | "start_code %lx end_code %lx start_data %lx end_data %lx\n" |
104 | "start_brk %lx brk %lx start_stack %lx\n" | |
105 | "arg_start %lx arg_end %lx env_start %lx env_end %lx\n" | |
106 | "binfmt %p flags %lx core_state %p\n" | |
107 | #ifdef CONFIG_AIO | |
108 | "ioctx_table %p\n" | |
109 | #endif | |
110 | #ifdef CONFIG_MEMCG | |
111 | "owner %p " | |
112 | #endif | |
113 | "exe_file %p\n" | |
114 | #ifdef CONFIG_MMU_NOTIFIER | |
115 | "mmu_notifier_mm %p\n" | |
116 | #endif | |
117 | #ifdef CONFIG_NUMA_BALANCING | |
118 | "numa_next_scan %lu numa_scan_offset %lu numa_scan_seq %d\n" | |
119 | #endif | |
120 | #if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION) | |
121 | "tlb_flush_pending %d\n" | |
122 | #endif | |
b8eceeb9 | 123 | "def_flags: %#lx(%pGv)\n", |
31c9afa6 SL |
124 | |
125 | mm, mm->mmap, mm->vmacache_seqnum, mm->task_size, | |
126 | #ifdef CONFIG_MMU | |
127 | mm->get_unmapped_area, | |
128 | #endif | |
129 | mm->mmap_base, mm->mmap_legacy_base, mm->highest_vm_end, | |
130 | mm->pgd, atomic_read(&mm->mm_users), | |
131 | atomic_read(&mm->mm_count), | |
132 | atomic_long_read((atomic_long_t *)&mm->nr_ptes), | |
dc6c9a35 | 133 | mm_nr_pmds((struct mm_struct *)mm), |
31c9afa6 SL |
134 | mm->map_count, |
135 | mm->hiwater_rss, mm->hiwater_vm, mm->total_vm, mm->locked_vm, | |
84638335 | 136 | mm->pinned_vm, mm->data_vm, mm->exec_vm, mm->stack_vm, |
31c9afa6 SL |
137 | mm->start_code, mm->end_code, mm->start_data, mm->end_data, |
138 | mm->start_brk, mm->brk, mm->start_stack, | |
139 | mm->arg_start, mm->arg_end, mm->env_start, mm->env_end, | |
140 | mm->binfmt, mm->flags, mm->core_state, | |
141 | #ifdef CONFIG_AIO | |
142 | mm->ioctx_table, | |
143 | #endif | |
144 | #ifdef CONFIG_MEMCG | |
145 | mm->owner, | |
146 | #endif | |
147 | mm->exe_file, | |
148 | #ifdef CONFIG_MMU_NOTIFIER | |
149 | mm->mmu_notifier_mm, | |
150 | #endif | |
151 | #ifdef CONFIG_NUMA_BALANCING | |
152 | mm->numa_next_scan, mm->numa_scan_offset, mm->numa_scan_seq, | |
153 | #endif | |
154 | #if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION) | |
155 | mm->tlb_flush_pending, | |
156 | #endif | |
b8eceeb9 VB |
157 | mm->def_flags, &mm->def_flags |
158 | ); | |
31c9afa6 SL |
159 | } |
160 | ||
82742a3a | 161 | #endif /* CONFIG_DEBUG_VM */ |