blob: 5715448ab0b53db5d8bd4b64d47706f7deaaf7a6 [file] [log] [blame]
Sasha Levin31c9afa2014-10-09 15:28:37 -07001/*
2 * mm/debug.c
3 *
4 * mm/ specific debug routines.
5 *
6 */
7
Sasha Levin82742a32014-10-09 15:28:34 -07008#include <linux/kernel.h>
9#include <linux/mm.h>
Steven Rostedt (Red Hat)af658dc2015-04-29 14:36:05 -040010#include <linux/trace_events.h>
Sasha Levin82742a32014-10-09 15:28:34 -070011#include <linux/memcontrol.h>
Vlastimil Babka420adbe92016-03-15 14:55:52 -070012#include <trace/events/mmflags.h>
Vlastimil Babka7cd12b42016-03-15 14:56:18 -070013#include <linux/migrate.h>
Vlastimil Babka4e462112016-03-15 14:56:21 -070014#include <linux/page_owner.h>
Sasha Levin82742a32014-10-09 15:28:34 -070015
Vlastimil Babkaedf14cd2016-03-15 14:55:56 -070016#include "internal.h"
17
Vlastimil Babka7cd12b42016-03-15 14:56:18 -070018char *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
Vlastimil Babkaedf14cd2016-03-15 14:55:56 -070028const struct trace_print_flags pageflag_names[] = {
29 __def_pageflag_names,
30 {0, NULL}
Vlastimil Babka420adbe92016-03-15 14:55:52 -070031};
32
Vlastimil Babkaedf14cd2016-03-15 14:55:56 -070033const 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}
Sasha Levin82742a32014-10-09 15:28:34 -070041};
42
Vlastimil Babkaff8e8112016-03-15 14:56:24 -070043void __dump_page(struct page *page, const char *reason)
Sasha Levin82742a32014-10-09 15:28:34 -070044{
Kirill A. Shutemov9996f052016-10-07 17:01:40 -070045 /*
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 */
Kirill A. Shutemov4d354272016-09-19 14:44:07 -070050 int mapcount = PageSlab(page) ? 0 : page_mapcount(page);
51
Kirill A. Shutemov53f92632016-01-15 16:53:42 -080052 pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx",
Kirill A. Shutemov4d354272016-09-19 14:44:07 -070053 page, page_ref_count(page), mapcount,
54 page->mapping, page_to_pgoff(page));
Kirill A. Shutemov53f92632016-01-15 16:53:42 -080055 if (PageCompound(page))
56 pr_cont(" compound_mapcount: %d", compound_mapcount(page));
57 pr_cont("\n");
Vlastimil Babkaedf14cd2016-03-15 14:55:56 -070058 BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS + 1);
Vlastimil Babkaff8e8112016-03-15 14:56:24 -070059
Vlastimil Babkab8eceeb2016-03-15 14:55:59 -070060 pr_emerg("flags: %#lx(%pGp)\n", page->flags, &page->flags);
61
Vlastimil Babka46e8a3a02016-12-12 16:44:35 -080062 print_hex_dump(KERN_ALERT, "raw: ", DUMP_PREFIX_NONE, 32,
63 sizeof(unsigned long), page,
64 sizeof(struct page), false);
65
Sasha Levin82742a32014-10-09 15:28:34 -070066 if (reason)
67 pr_alert("page dumped because: %s\n", reason);
Vlastimil Babkab8eceeb2016-03-15 14:55:59 -070068
Johannes Weiner9edad6e2014-12-10 15:44:58 -080069#ifdef CONFIG_MEMCG
70 if (page->mem_cgroup)
71 pr_alert("page->mem_cgroup:%p\n", page->mem_cgroup);
72#endif
Sasha Levin82742a32014-10-09 15:28:34 -070073}
74
75void dump_page(struct page *page, const char *reason)
76{
Vlastimil Babkaff8e8112016-03-15 14:56:24 -070077 __dump_page(page, reason);
Vlastimil Babka4e462112016-03-15 14:56:21 -070078 dump_page_owner(page);
Sasha Levin82742a32014-10-09 15:28:34 -070079}
80EXPORT_SYMBOL(dump_page);
81
82#ifdef CONFIG_DEBUG_VM
83
Sasha Levin82742a32014-10-09 15:28:34 -070084void dump_vma(const struct vm_area_struct *vma)
85{
Andrew Morton7a82ca02014-10-09 15:28:41 -070086 pr_emerg("vma %p start %p end %p\n"
Sasha Levin82742a32014-10-09 15:28:34 -070087 "next %p prev %p mm %p\n"
88 "prot %lx anon_vma %p vm_ops %p\n"
Vlastimil Babkab8eceeb2016-03-15 14:55:59 -070089 "pgoff %lx file %p private_data %p\n"
90 "flags: %#lx(%pGv)\n",
Sasha Levin82742a32014-10-09 15:28:34 -070091 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,
Vlastimil Babkab8eceeb2016-03-15 14:55:59 -070095 vma->vm_file, vma->vm_private_data,
96 vma->vm_flags, &vma->vm_flags);
Sasha Levin82742a32014-10-09 15:28:34 -070097}
98EXPORT_SYMBOL(dump_vma);
99
Sasha Levin31c9afa2014-10-09 15:28:37 -0700100void dump_mm(const struct mm_struct *mm)
101{
Andrew Morton7a82ca02014-10-09 15:28:41 -0700102 pr_emerg("mm %p mmap %p seqnum %d task_size %lu\n"
Sasha Levin31c9afa2014-10-09 15:28:37 -0700103#ifdef CONFIG_MMU
104 "get_unmapped_area %p\n"
105#endif
106 "mmap_base %lu mmap_legacy_base %lu highest_vm_end %lu\n"
Kirill A. Shutemovdc6c9a32015-02-11 15:26:50 -0800107 "pgd %p mm_users %d mm_count %d nr_ptes %lu nr_pmds %lu map_count %d\n"
Sasha Levin31c9afa2014-10-09 15:28:37 -0700108 "hiwater_rss %lx hiwater_vm %lx total_vm %lx locked_vm %lx\n"
Konstantin Khlebnikov84638332016-01-14 15:22:07 -0800109 "pinned_vm %lx data_vm %lx exec_vm %lx stack_vm %lx\n"
Sasha Levin31c9afa2014-10-09 15:28:37 -0700110 "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
Sasha Levin31c9afa2014-10-09 15:28:37 -0700127 "tlb_flush_pending %d\n"
Vlastimil Babkab8eceeb2016-03-15 14:55:59 -0700128 "def_flags: %#lx(%pGv)\n",
Sasha Levin31c9afa2014-10-09 15:28:37 -0700129
130 mm, mm->mmap, mm->vmacache_seqnum, mm->task_size,
131#ifdef CONFIG_MMU
132 mm->get_unmapped_area,
133#endif
134 mm->mmap_base, mm->mmap_legacy_base, mm->highest_vm_end,
135 mm->pgd, atomic_read(&mm->mm_users),
136 atomic_read(&mm->mm_count),
137 atomic_long_read((atomic_long_t *)&mm->nr_ptes),
Kirill A. Shutemovdc6c9a32015-02-11 15:26:50 -0800138 mm_nr_pmds((struct mm_struct *)mm),
Sasha Levin31c9afa2014-10-09 15:28:37 -0700139 mm->map_count,
140 mm->hiwater_rss, mm->hiwater_vm, mm->total_vm, mm->locked_vm,
Konstantin Khlebnikov84638332016-01-14 15:22:07 -0800141 mm->pinned_vm, mm->data_vm, mm->exec_vm, mm->stack_vm,
Sasha Levin31c9afa2014-10-09 15:28:37 -0700142 mm->start_code, mm->end_code, mm->start_data, mm->end_data,
143 mm->start_brk, mm->brk, mm->start_stack,
144 mm->arg_start, mm->arg_end, mm->env_start, mm->env_end,
145 mm->binfmt, mm->flags, mm->core_state,
146#ifdef CONFIG_AIO
147 mm->ioctx_table,
148#endif
149#ifdef CONFIG_MEMCG
150 mm->owner,
151#endif
152 mm->exe_file,
153#ifdef CONFIG_MMU_NOTIFIER
154 mm->mmu_notifier_mm,
155#endif
156#ifdef CONFIG_NUMA_BALANCING
157 mm->numa_next_scan, mm->numa_scan_offset, mm->numa_scan_seq,
158#endif
Nadav Amit16af97d2017-08-10 15:23:56 -0700159 atomic_read(&mm->tlb_flush_pending),
Vlastimil Babkab8eceeb2016-03-15 14:55:59 -0700160 mm->def_flags, &mm->def_flags
161 );
Sasha Levin31c9afa2014-10-09 15:28:37 -0700162}
163
Sasha Levin82742a32014-10-09 15:28:34 -0700164#endif /* CONFIG_DEBUG_VM */