Root/
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/ftrace_event.h> |
11 | #include <linux/memcontrol.h> |
12 | |
13 | static const struct trace_print_flags pageflag_names[] = { |
14 | {1UL << PG_locked, "locked" }, |
15 | {1UL << PG_error, "error" }, |
16 | {1UL << PG_referenced, "referenced" }, |
17 | {1UL << PG_uptodate, "uptodate" }, |
18 | {1UL << PG_dirty, "dirty" }, |
19 | {1UL << PG_lru, "lru" }, |
20 | {1UL << PG_active, "active" }, |
21 | {1UL << PG_slab, "slab" }, |
22 | {1UL << PG_owner_priv_1, "owner_priv_1" }, |
23 | {1UL << PG_arch_1, "arch_1" }, |
24 | {1UL << PG_reserved, "reserved" }, |
25 | {1UL << PG_private, "private" }, |
26 | {1UL << PG_private_2, "private_2" }, |
27 | {1UL << PG_writeback, "writeback" }, |
28 | #ifdef CONFIG_PAGEFLAGS_EXTENDED |
29 | {1UL << PG_head, "head" }, |
30 | {1UL << PG_tail, "tail" }, |
31 | #else |
32 | {1UL << PG_compound, "compound" }, |
33 | #endif |
34 | {1UL << PG_swapcache, "swapcache" }, |
35 | {1UL << PG_mappedtodisk, "mappedtodisk" }, |
36 | {1UL << PG_reclaim, "reclaim" }, |
37 | {1UL << PG_swapbacked, "swapbacked" }, |
38 | {1UL << PG_unevictable, "unevictable" }, |
39 | #ifdef CONFIG_MMU |
40 | {1UL << PG_mlocked, "mlocked" }, |
41 | #endif |
42 | #ifdef CONFIG_ARCH_USES_PG_UNCACHED |
43 | {1UL << PG_uncached, "uncached" }, |
44 | #endif |
45 | #ifdef CONFIG_MEMORY_FAILURE |
46 | {1UL << PG_hwpoison, "hwpoison" }, |
47 | #endif |
48 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
49 | {1UL << PG_compound_lock, "compound_lock" }, |
50 | #endif |
51 | }; |
52 | |
53 | static void dump_flags(unsigned long flags, |
54 | const struct trace_print_flags *names, int count) |
55 | { |
56 | const char *delim = ""; |
57 | unsigned long mask; |
58 | int i; |
59 | |
60 | pr_emerg("flags: %#lx(", flags); |
61 | |
62 | /* remove zone id */ |
63 | flags &= (1UL << NR_PAGEFLAGS) - 1; |
64 | |
65 | for (i = 0; i < count && flags; i++) { |
66 | |
67 | mask = names[i].mask; |
68 | if ((flags & mask) != mask) |
69 | continue; |
70 | |
71 | flags &= ~mask; |
72 | pr_cont("%s%s", delim, names[i].name); |
73 | delim = "|"; |
74 | } |
75 | |
76 | /* check for left over flags */ |
77 | if (flags) |
78 | pr_cont("%s%#lx", delim, flags); |
79 | |
80 | pr_cont(")\n"); |
81 | } |
82 | |
83 | void dump_page_badflags(struct page *page, const char *reason, |
84 | unsigned long badflags) |
85 | { |
86 | pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx\n", |
87 | page, atomic_read(&page->_count), page_mapcount(page), |
88 | page->mapping, page->index); |
89 | BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS); |
90 | dump_flags(page->flags, pageflag_names, ARRAY_SIZE(pageflag_names)); |
91 | if (reason) |
92 | pr_alert("page dumped because: %s\n", reason); |
93 | if (page->flags & badflags) { |
94 | pr_alert("bad because of flags:\n"); |
95 | dump_flags(page->flags & badflags, |
96 | pageflag_names, ARRAY_SIZE(pageflag_names)); |
97 | } |
98 | mem_cgroup_print_bad_page(page); |
99 | } |
100 | |
101 | void dump_page(struct page *page, const char *reason) |
102 | { |
103 | dump_page_badflags(page, reason, 0); |
104 | } |
105 | EXPORT_SYMBOL(dump_page); |
106 | |
107 | #ifdef CONFIG_DEBUG_VM |
108 | |
109 | static const struct trace_print_flags vmaflags_names[] = { |
110 | {VM_READ, "read" }, |
111 | {VM_WRITE, "write" }, |
112 | {VM_EXEC, "exec" }, |
113 | {VM_SHARED, "shared" }, |
114 | {VM_MAYREAD, "mayread" }, |
115 | {VM_MAYWRITE, "maywrite" }, |
116 | {VM_MAYEXEC, "mayexec" }, |
117 | {VM_MAYSHARE, "mayshare" }, |
118 | {VM_GROWSDOWN, "growsdown" }, |
119 | {VM_PFNMAP, "pfnmap" }, |
120 | {VM_DENYWRITE, "denywrite" }, |
121 | {VM_LOCKED, "locked" }, |
122 | {VM_IO, "io" }, |
123 | {VM_SEQ_READ, "seqread" }, |
124 | {VM_RAND_READ, "randread" }, |
125 | {VM_DONTCOPY, "dontcopy" }, |
126 | {VM_DONTEXPAND, "dontexpand" }, |
127 | {VM_ACCOUNT, "account" }, |
128 | {VM_NORESERVE, "noreserve" }, |
129 | {VM_HUGETLB, "hugetlb" }, |
130 | {VM_NONLINEAR, "nonlinear" }, |
131 | #if defined(CONFIG_X86) |
132 | {VM_PAT, "pat" }, |
133 | #elif defined(CONFIG_PPC) |
134 | {VM_SAO, "sao" }, |
135 | #elif defined(CONFIG_PARISC) || defined(CONFIG_METAG) || defined(CONFIG_IA64) |
136 | {VM_GROWSUP, "growsup" }, |
137 | #elif !defined(CONFIG_MMU) |
138 | {VM_MAPPED_COPY, "mappedcopy" }, |
139 | #else |
140 | {VM_ARCH_1, "arch_1" }, |
141 | #endif |
142 | {VM_DONTDUMP, "dontdump" }, |
143 | #ifdef CONFIG_MEM_SOFT_DIRTY |
144 | {VM_SOFTDIRTY, "softdirty" }, |
145 | #endif |
146 | {VM_MIXEDMAP, "mixedmap" }, |
147 | {VM_HUGEPAGE, "hugepage" }, |
148 | {VM_NOHUGEPAGE, "nohugepage" }, |
149 | {VM_MERGEABLE, "mergeable" }, |
150 | }; |
151 | |
152 | void dump_vma(const struct vm_area_struct *vma) |
153 | { |
154 | pr_emerg("vma %p start %p end %p\n" |
155 | "next %p prev %p mm %p\n" |
156 | "prot %lx anon_vma %p vm_ops %p\n" |
157 | "pgoff %lx file %p private_data %p\n", |
158 | vma, (void *)vma->vm_start, (void *)vma->vm_end, vma->vm_next, |
159 | vma->vm_prev, vma->vm_mm, |
160 | (unsigned long)pgprot_val(vma->vm_page_prot), |
161 | vma->anon_vma, vma->vm_ops, vma->vm_pgoff, |
162 | vma->vm_file, vma->vm_private_data); |
163 | dump_flags(vma->vm_flags, vmaflags_names, ARRAY_SIZE(vmaflags_names)); |
164 | } |
165 | EXPORT_SYMBOL(dump_vma); |
166 | |
167 | void dump_mm(const struct mm_struct *mm) |
168 | { |
169 | pr_emerg("mm %p mmap %p seqnum %d task_size %lu\n" |
170 | #ifdef CONFIG_MMU |
171 | "get_unmapped_area %p\n" |
172 | #endif |
173 | "mmap_base %lu mmap_legacy_base %lu highest_vm_end %lu\n" |
174 | "pgd %p mm_users %d mm_count %d nr_ptes %lu map_count %d\n" |
175 | "hiwater_rss %lx hiwater_vm %lx total_vm %lx locked_vm %lx\n" |
176 | "pinned_vm %lx shared_vm %lx exec_vm %lx stack_vm %lx\n" |
177 | "start_code %lx end_code %lx start_data %lx end_data %lx\n" |
178 | "start_brk %lx brk %lx start_stack %lx\n" |
179 | "arg_start %lx arg_end %lx env_start %lx env_end %lx\n" |
180 | "binfmt %p flags %lx core_state %p\n" |
181 | #ifdef CONFIG_AIO |
182 | "ioctx_table %p\n" |
183 | #endif |
184 | #ifdef CONFIG_MEMCG |
185 | "owner %p " |
186 | #endif |
187 | "exe_file %p\n" |
188 | #ifdef CONFIG_MMU_NOTIFIER |
189 | "mmu_notifier_mm %p\n" |
190 | #endif |
191 | #ifdef CONFIG_NUMA_BALANCING |
192 | "numa_next_scan %lu numa_scan_offset %lu numa_scan_seq %d\n" |
193 | #endif |
194 | #if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION) |
195 | "tlb_flush_pending %d\n" |
196 | #endif |
197 | "%s", /* This is here to hold the comma */ |
198 | |
199 | mm, mm->mmap, mm->vmacache_seqnum, mm->task_size, |
200 | #ifdef CONFIG_MMU |
201 | mm->get_unmapped_area, |
202 | #endif |
203 | mm->mmap_base, mm->mmap_legacy_base, mm->highest_vm_end, |
204 | mm->pgd, atomic_read(&mm->mm_users), |
205 | atomic_read(&mm->mm_count), |
206 | atomic_long_read((atomic_long_t *)&mm->nr_ptes), |
207 | mm->map_count, |
208 | mm->hiwater_rss, mm->hiwater_vm, mm->total_vm, mm->locked_vm, |
209 | mm->pinned_vm, mm->shared_vm, mm->exec_vm, mm->stack_vm, |
210 | mm->start_code, mm->end_code, mm->start_data, mm->end_data, |
211 | mm->start_brk, mm->brk, mm->start_stack, |
212 | mm->arg_start, mm->arg_end, mm->env_start, mm->env_end, |
213 | mm->binfmt, mm->flags, mm->core_state, |
214 | #ifdef CONFIG_AIO |
215 | mm->ioctx_table, |
216 | #endif |
217 | #ifdef CONFIG_MEMCG |
218 | mm->owner, |
219 | #endif |
220 | mm->exe_file, |
221 | #ifdef CONFIG_MMU_NOTIFIER |
222 | mm->mmu_notifier_mm, |
223 | #endif |
224 | #ifdef CONFIG_NUMA_BALANCING |
225 | mm->numa_next_scan, mm->numa_scan_offset, mm->numa_scan_seq, |
226 | #endif |
227 | #if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION) |
228 | mm->tlb_flush_pending, |
229 | #endif |
230 | "" /* This is here to not have a comma! */ |
231 | ); |
232 | |
233 | dump_flags(mm->def_flags, vmaflags_names, |
234 | ARRAY_SIZE(vmaflags_names)); |
235 | } |
236 | |
237 | #endif /* CONFIG_DEBUG_VM */ |
238 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9