LXR linux/mm/debug.c

   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 */
 158