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