Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

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 
 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 */
169 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us