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1 | /* | |
2 | * mm/debug.c | |
3 | * | |
4 | * mm/ specific debug routines. | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <linux/kernel.h> | |
9 | #include <linux/mm.h> | |
10 | #include <linux/trace_events.h> | |
11 | #include <linux/memcontrol.h> | |
12 | #include <trace/events/mmflags.h> | |
13 | #include <linux/migrate.h> | |
14 | #include <linux/page_owner.h> | |
15 | ||
16 | #include "internal.h" | |
17 | ||
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 | ||
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} | |
36 | }; | |
37 | ||
38 | const struct trace_print_flags vmaflag_names[] = { | |
39 | __def_vmaflag_names, | |
40 | {0, NULL} | |
41 | }; | |
42 | ||
43 | void __dump_page(struct page *page, const char *reason) | |
44 | { | |
45 | /* | |
46 | * Avoid VM_BUG_ON() in page_mapcount(). | |
47 | * page->_mapcount space in struct page is used by sl[aou]b pages to | |
48 | * encode own info. | |
49 | */ | |
50 | int mapcount = PageSlab(page) ? 0 : page_mapcount(page); | |
51 | ||
52 | pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx", | |
53 | page, page_ref_count(page), mapcount, | |
54 | page->mapping, page_to_pgoff(page)); | |
55 | if (PageCompound(page)) | |
56 | pr_cont(" compound_mapcount: %d", compound_mapcount(page)); | |
57 | pr_cont("\n"); | |
58 | BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS + 1); | |
59 | ||
60 | pr_emerg("flags: %#lx(%pGp)\n", page->flags, &page->flags); | |
61 | ||
62 | print_hex_dump(KERN_ALERT, "raw: ", DUMP_PREFIX_NONE, 32, | |
63 | sizeof(unsigned long), page, | |
64 | sizeof(struct page), false); | |
65 | ||
66 | if (reason) | |
67 | pr_alert("page dumped because: %s\n", reason); | |
68 | ||
69 | #ifdef CONFIG_MEMCG | |
70 | if (page->mem_cgroup) | |
71 | pr_alert("page->mem_cgroup:%p\n", page->mem_cgroup); | |
72 | #endif | |
73 | } | |
74 | ||
75 | void dump_page(struct page *page, const char *reason) | |
76 | { | |
77 | __dump_page(page, reason); | |
78 | dump_page_owner(page); | |
79 | } | |
80 | EXPORT_SYMBOL(dump_page); | |
81 | ||
82 | #ifdef CONFIG_DEBUG_VM | |
83 | ||
84 | void dump_vma(const struct vm_area_struct *vma) | |
85 | { | |
86 | pr_emerg("vma %p start %p end %p\n" | |
87 | "next %p prev %p mm %p\n" | |
88 | "prot %lx anon_vma %p vm_ops %p\n" | |
89 | "pgoff %lx file %p private_data %p\n" | |
90 | "flags: %#lx(%pGv)\n", | |
91 | vma, (void *)vma->vm_start, (void *)vma->vm_end, vma->vm_next, | |
92 | vma->vm_prev, vma->vm_mm, | |
93 | (unsigned long)pgprot_val(vma->vm_page_prot), | |
94 | vma->anon_vma, vma->vm_ops, vma->vm_pgoff, | |
95 | vma->vm_file, vma->vm_private_data, | |
96 | vma->vm_flags, &vma->vm_flags); | |
97 | } | |
98 | EXPORT_SYMBOL(dump_vma); | |
99 | ||
100 | void dump_mm(const struct mm_struct *mm) | |
101 | { | |
102 | pr_emerg("mm %p mmap %p seqnum %d task_size %lu\n" | |
103 | #ifdef CONFIG_MMU | |
104 | "get_unmapped_area %p\n" | |
105 | #endif | |
106 | "mmap_base %lu mmap_legacy_base %lu highest_vm_end %lu\n" | |
107 | "pgd %p mm_users %d mm_count %d nr_ptes %lu nr_pmds %lu map_count %d\n" | |
108 | "hiwater_rss %lx hiwater_vm %lx total_vm %lx locked_vm %lx\n" | |
109 | "pinned_vm %lx data_vm %lx exec_vm %lx stack_vm %lx\n" | |
110 | "start_code %lx end_code %lx start_data %lx end_data %lx\n" | |
111 | "start_brk %lx brk %lx start_stack %lx\n" | |
112 | "arg_start %lx arg_end %lx env_start %lx env_end %lx\n" | |
113 | "binfmt %p flags %lx core_state %p\n" | |
114 | #ifdef CONFIG_AIO | |
115 | "ioctx_table %p\n" | |
116 | #endif | |
117 | #ifdef CONFIG_MEMCG | |
118 | "owner %p " | |
119 | #endif | |
120 | "exe_file %p\n" | |
121 | #ifdef CONFIG_MMU_NOTIFIER | |
122 | "mmu_notifier_mm %p\n" | |
123 | #endif | |
124 | #ifdef CONFIG_NUMA_BALANCING | |
125 | "numa_next_scan %lu numa_scan_offset %lu numa_scan_seq %d\n" | |
126 | #endif | |
127 | #if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION) | |
128 | "tlb_flush_pending %d\n" | |
129 | #endif | |
130 | "def_flags: %#lx(%pGv)\n", | |
131 | ||
132 | mm, mm->mmap, mm->vmacache_seqnum, mm->task_size, | |
133 | #ifdef CONFIG_MMU | |
134 | mm->get_unmapped_area, | |
135 | #endif | |
136 | mm->mmap_base, mm->mmap_legacy_base, mm->highest_vm_end, | |
137 | mm->pgd, atomic_read(&mm->mm_users), | |
138 | atomic_read(&mm->mm_count), | |
139 | atomic_long_read((atomic_long_t *)&mm->nr_ptes), | |
140 | mm_nr_pmds((struct mm_struct *)mm), | |
141 | mm->map_count, | |
142 | mm->hiwater_rss, mm->hiwater_vm, mm->total_vm, mm->locked_vm, | |
143 | mm->pinned_vm, mm->data_vm, mm->exec_vm, mm->stack_vm, | |
144 | mm->start_code, mm->end_code, mm->start_data, mm->end_data, | |
145 | mm->start_brk, mm->brk, mm->start_stack, | |
146 | mm->arg_start, mm->arg_end, mm->env_start, mm->env_end, | |
147 | mm->binfmt, mm->flags, mm->core_state, | |
148 | #ifdef CONFIG_AIO | |
149 | mm->ioctx_table, | |
150 | #endif | |
151 | #ifdef CONFIG_MEMCG | |
152 | mm->owner, | |
153 | #endif | |
154 | mm->exe_file, | |
155 | #ifdef CONFIG_MMU_NOTIFIER | |
156 | mm->mmu_notifier_mm, | |
157 | #endif | |
158 | #ifdef CONFIG_NUMA_BALANCING | |
159 | mm->numa_next_scan, mm->numa_scan_offset, mm->numa_scan_seq, | |
160 | #endif | |
161 | #if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION) | |
162 | mm->tlb_flush_pending, | |
163 | #endif | |
164 | mm->def_flags, &mm->def_flags | |
165 | ); | |
166 | } | |
167 | ||
168 | #endif /* CONFIG_DEBUG_VM */ |