Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 | /* * mm/debug.c * * mm/ specific debug routines. * */ #include <linux/kernel.h> #include <linux/mm.h> #include <linux/trace_events.h> #include <linux/memcontrol.h> static const struct trace_print_flags pageflag_names[] = { {1UL << PG_locked, "locked" }, {1UL << PG_error, "error" }, {1UL << PG_referenced, "referenced" }, {1UL << PG_uptodate, "uptodate" }, {1UL << PG_dirty, "dirty" }, {1UL << PG_lru, "lru" }, {1UL << PG_active, "active" }, {1UL << PG_slab, "slab" }, {1UL << PG_owner_priv_1, "owner_priv_1" }, {1UL << PG_arch_1, "arch_1" }, {1UL << PG_reserved, "reserved" }, {1UL << PG_private, "private" }, {1UL << PG_private_2, "private_2" }, {1UL << PG_writeback, "writeback" }, {1UL << PG_head, "head" }, {1UL << PG_swapcache, "swapcache" }, {1UL << PG_mappedtodisk, "mappedtodisk" }, {1UL << PG_reclaim, "reclaim" }, {1UL << PG_swapbacked, "swapbacked" }, {1UL << PG_unevictable, "unevictable" }, #ifdef CONFIG_MMU {1UL << PG_mlocked, "mlocked" }, #endif #ifdef CONFIG_ARCH_USES_PG_UNCACHED {1UL << PG_uncached, "uncached" }, #endif #ifdef CONFIG_MEMORY_FAILURE {1UL << PG_hwpoison, "hwpoison" }, #endif #ifdef CONFIG_TRANSPARENT_HUGEPAGE {1UL << PG_compound_lock, "compound_lock" }, #endif #if defined(CONFIG_IDLE_PAGE_TRACKING) && defined(CONFIG_64BIT) {1UL << PG_young, "young" }, {1UL << PG_idle, "idle" }, #endif }; static void dump_flags(unsigned long flags, const struct trace_print_flags *names, int count) { const char *delim = ""; unsigned long mask; int i; pr_emerg("flags: %#lx(", flags); /* remove zone id */ flags &= (1UL << NR_PAGEFLAGS) - 1; for (i = 0; i < count && flags; i++) { mask = names[i].mask; if ((flags & mask) != mask) continue; flags &= ~mask; pr_cont("%s%s", delim, names[i].name); delim = "|"; } /* check for left over flags */ if (flags) pr_cont("%s%#lx", delim, flags); pr_cont(")\n"); } void dump_page_badflags(struct page *page, const char *reason, unsigned long badflags) { pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx\n", page, atomic_read(&page->_count), page_mapcount(page), page->mapping, page->index); BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS); dump_flags(page->flags, pageflag_names, ARRAY_SIZE(pageflag_names)); if (reason) pr_alert("page dumped because: %s\n", reason); if (page->flags & badflags) { pr_alert("bad because of flags:\n"); dump_flags(page->flags & badflags, pageflag_names, ARRAY_SIZE(pageflag_names)); } #ifdef CONFIG_MEMCG if (page->mem_cgroup) pr_alert("page->mem_cgroup:%p\n", page->mem_cgroup); #endif } void dump_page(struct page *page, const char *reason) { dump_page_badflags(page, reason, 0); } EXPORT_SYMBOL(dump_page); #ifdef CONFIG_DEBUG_VM static const struct trace_print_flags vmaflags_names[] = { {VM_READ, "read" }, {VM_WRITE, "write" }, {VM_EXEC, "exec" }, {VM_SHARED, "shared" }, {VM_MAYREAD, "mayread" }, {VM_MAYWRITE, "maywrite" }, {VM_MAYEXEC, "mayexec" }, {VM_MAYSHARE, "mayshare" }, {VM_GROWSDOWN, "growsdown" }, {VM_PFNMAP, "pfnmap" }, {VM_DENYWRITE, "denywrite" }, {VM_LOCKONFAULT, "lockonfault" }, {VM_LOCKED, "locked" }, {VM_IO, "io" }, {VM_SEQ_READ, "seqread" }, {VM_RAND_READ, "randread" }, {VM_DONTCOPY, "dontcopy" }, {VM_DONTEXPAND, "dontexpand" }, {VM_ACCOUNT, "account" }, {VM_NORESERVE, "noreserve" }, {VM_HUGETLB, "hugetlb" }, #if defined(CONFIG_X86) {VM_PAT, "pat" }, #elif defined(CONFIG_PPC) {VM_SAO, "sao" }, #elif defined(CONFIG_PARISC) || defined(CONFIG_METAG) || defined(CONFIG_IA64) {VM_GROWSUP, "growsup" }, #elif !defined(CONFIG_MMU) {VM_MAPPED_COPY, "mappedcopy" }, #else {VM_ARCH_1, "arch_1" }, #endif {VM_DONTDUMP, "dontdump" }, #ifdef CONFIG_MEM_SOFT_DIRTY {VM_SOFTDIRTY, "softdirty" }, #endif {VM_MIXEDMAP, "mixedmap" }, {VM_HUGEPAGE, "hugepage" }, {VM_NOHUGEPAGE, "nohugepage" }, {VM_MERGEABLE, "mergeable" }, }; void dump_vma(const struct vm_area_struct *vma) { pr_emerg("vma %p start %p end %p\n" "next %p prev %p mm %p\n" "prot %lx anon_vma %p vm_ops %p\n" "pgoff %lx file %p private_data %p\n", vma, (void *)vma->vm_start, (void *)vma->vm_end, vma->vm_next, vma->vm_prev, vma->vm_mm, (unsigned long)pgprot_val(vma->vm_page_prot), vma->anon_vma, vma->vm_ops, vma->vm_pgoff, vma->vm_file, vma->vm_private_data); dump_flags(vma->vm_flags, vmaflags_names, ARRAY_SIZE(vmaflags_names)); } EXPORT_SYMBOL(dump_vma); void dump_mm(const struct mm_struct *mm) { pr_emerg("mm %p mmap %p seqnum %d task_size %lu\n" #ifdef CONFIG_MMU "get_unmapped_area %p\n" #endif "mmap_base %lu mmap_legacy_base %lu highest_vm_end %lu\n" "pgd %p mm_users %d mm_count %d nr_ptes %lu nr_pmds %lu map_count %d\n" "hiwater_rss %lx hiwater_vm %lx total_vm %lx locked_vm %lx\n" "pinned_vm %lx shared_vm %lx exec_vm %lx stack_vm %lx\n" "start_code %lx end_code %lx start_data %lx end_data %lx\n" "start_brk %lx brk %lx start_stack %lx\n" "arg_start %lx arg_end %lx env_start %lx env_end %lx\n" "binfmt %p flags %lx core_state %p\n" #ifdef CONFIG_AIO "ioctx_table %p\n" #endif #ifdef CONFIG_MEMCG "owner %p " #endif "exe_file %p\n" #ifdef CONFIG_MMU_NOTIFIER "mmu_notifier_mm %p\n" #endif #ifdef CONFIG_NUMA_BALANCING "numa_next_scan %lu numa_scan_offset %lu numa_scan_seq %d\n" #endif #if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION) "tlb_flush_pending %d\n" #endif "%s", /* This is here to hold the comma */ mm, mm->mmap, mm->vmacache_seqnum, mm->task_size, #ifdef CONFIG_MMU mm->get_unmapped_area, #endif mm->mmap_base, mm->mmap_legacy_base, mm->highest_vm_end, mm->pgd, atomic_read(&mm->mm_users), atomic_read(&mm->mm_count), atomic_long_read((atomic_long_t *)&mm->nr_ptes), mm_nr_pmds((struct mm_struct *)mm), mm->map_count, mm->hiwater_rss, mm->hiwater_vm, mm->total_vm, mm->locked_vm, mm->pinned_vm, mm->shared_vm, mm->exec_vm, mm->stack_vm, mm->start_code, mm->end_code, mm->start_data, mm->end_data, mm->start_brk, mm->brk, mm->start_stack, mm->arg_start, mm->arg_end, mm->env_start, mm->env_end, mm->binfmt, mm->flags, mm->core_state, #ifdef CONFIG_AIO mm->ioctx_table, #endif #ifdef CONFIG_MEMCG mm->owner, #endif mm->exe_file, #ifdef CONFIG_MMU_NOTIFIER mm->mmu_notifier_mm, #endif #ifdef CONFIG_NUMA_BALANCING mm->numa_next_scan, mm->numa_scan_offset, mm->numa_scan_seq, #endif #if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION) mm->tlb_flush_pending, #endif "" /* This is here to not have a comma! */ ); dump_flags(mm->def_flags, vmaflags_names, ARRAY_SIZE(vmaflags_names)); } #endif /* CONFIG_DEBUG_VM */ |