1 // SPDX-License-Identifier: GPL-2.0
5 * mm/ specific debug routines.
9 #include <linux/kernel.h>
11 #include <linux/trace_events.h>
12 #include <linux/memcontrol.h>
13 #include <trace/events/mmflags.h>
14 #include <linux/migrate.h>
15 #include <linux/page_owner.h>
19 char *migrate_reason_names
[MR_TYPES
] = {
30 const struct trace_print_flags pageflag_names
[] = {
35 const struct trace_print_flags gfpflag_names
[] = {
40 const struct trace_print_flags vmaflag_names
[] = {
45 void __dump_page(struct page
*page
, const char *reason
)
48 * Avoid VM_BUG_ON() in page_mapcount().
49 * page->_mapcount space in struct page is used by sl[aou]b pages to
52 int mapcount
= PageSlab(page
) ? 0 : page_mapcount(page
);
54 pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx",
55 page
, page_ref_count(page
), mapcount
,
56 page
->mapping
, page_to_pgoff(page
));
57 if (PageCompound(page
))
58 pr_cont(" compound_mapcount: %d", compound_mapcount(page
));
60 BUILD_BUG_ON(ARRAY_SIZE(pageflag_names
) != __NR_PAGEFLAGS
+ 1);
62 pr_emerg("flags: %#lx(%pGp)\n", page
->flags
, &page
->flags
);
64 print_hex_dump(KERN_ALERT
, "raw: ", DUMP_PREFIX_NONE
, 32,
65 sizeof(unsigned long), page
,
66 sizeof(struct page
), false);
69 pr_alert("page dumped because: %s\n", reason
);
73 pr_alert("page->mem_cgroup:%p\n", page
->mem_cgroup
);
77 void dump_page(struct page
*page
, const char *reason
)
79 __dump_page(page
, reason
);
80 dump_page_owner(page
);
82 EXPORT_SYMBOL(dump_page
);
84 #ifdef CONFIG_DEBUG_VM
86 void dump_vma(const struct vm_area_struct
*vma
)
88 pr_emerg("vma %p start %p end %p\n"
89 "next %p prev %p mm %p\n"
90 "prot %lx anon_vma %p vm_ops %p\n"
91 "pgoff %lx file %p private_data %p\n"
92 "flags: %#lx(%pGv)\n",
93 vma
, (void *)vma
->vm_start
, (void *)vma
->vm_end
, vma
->vm_next
,
94 vma
->vm_prev
, vma
->vm_mm
,
95 (unsigned long)pgprot_val(vma
->vm_page_prot
),
96 vma
->anon_vma
, vma
->vm_ops
, vma
->vm_pgoff
,
97 vma
->vm_file
, vma
->vm_private_data
,
98 vma
->vm_flags
, &vma
->vm_flags
);
100 EXPORT_SYMBOL(dump_vma
);
102 void dump_mm(const struct mm_struct
*mm
)
104 pr_emerg("mm %p mmap %p seqnum %llu task_size %lu\n"
106 "get_unmapped_area %p\n"
108 "mmap_base %lu mmap_legacy_base %lu highest_vm_end %lu\n"
109 "pgd %p mm_users %d mm_count %d nr_ptes %lu nr_pmds %lu map_count %d\n"
110 "hiwater_rss %lx hiwater_vm %lx total_vm %lx locked_vm %lx\n"
111 "pinned_vm %lx data_vm %lx exec_vm %lx stack_vm %lx\n"
112 "start_code %lx end_code %lx start_data %lx end_data %lx\n"
113 "start_brk %lx brk %lx start_stack %lx\n"
114 "arg_start %lx arg_end %lx env_start %lx env_end %lx\n"
115 "binfmt %p flags %lx core_state %p\n"
123 #ifdef CONFIG_MMU_NOTIFIER
124 "mmu_notifier_mm %p\n"
126 #ifdef CONFIG_NUMA_BALANCING
127 "numa_next_scan %lu numa_scan_offset %lu numa_scan_seq %d\n"
129 "tlb_flush_pending %d\n"
130 "def_flags: %#lx(%pGv)\n",
132 mm
, mm
->mmap
, (long long) mm
->vmacache_seqnum
, mm
->task_size
,
134 mm
->get_unmapped_area
,
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
),
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
,
155 #ifdef CONFIG_MMU_NOTIFIER
158 #ifdef CONFIG_NUMA_BALANCING
159 mm
->numa_next_scan
, mm
->numa_scan_offset
, mm
->numa_scan_seq
,
161 atomic_read(&mm
->tlb_flush_pending
),
162 mm
->def_flags
, &mm
->def_flags
166 #endif /* CONFIG_DEBUG_VM */