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Commit | Line | Data |
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1da177e4 | 1 | #include <linux/mm.h> |
615d6e87 | 2 | #include <linux/vmacache.h> |
1da177e4 | 3 | #include <linux/hugetlb.h> |
22e057c5 | 4 | #include <linux/huge_mm.h> |
1da177e4 LT |
5 | #include <linux/mount.h> |
6 | #include <linux/seq_file.h> | |
e070ad49 | 7 | #include <linux/highmem.h> |
5096add8 | 8 | #include <linux/ptrace.h> |
5a0e3ad6 | 9 | #include <linux/slab.h> |
6e21c8f1 CL |
10 | #include <linux/pagemap.h> |
11 | #include <linux/mempolicy.h> | |
22e057c5 | 12 | #include <linux/rmap.h> |
85863e47 MM |
13 | #include <linux/swap.h> |
14 | #include <linux/swapops.h> | |
0f8975ec | 15 | #include <linux/mmu_notifier.h> |
e070ad49 | 16 | |
1da177e4 LT |
17 | #include <asm/elf.h> |
18 | #include <asm/uaccess.h> | |
e070ad49 | 19 | #include <asm/tlbflush.h> |
1da177e4 LT |
20 | #include "internal.h" |
21 | ||
df5f8314 | 22 | void task_mem(struct seq_file *m, struct mm_struct *mm) |
1da177e4 | 23 | { |
b084d435 | 24 | unsigned long data, text, lib, swap; |
365e9c87 HD |
25 | unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss; |
26 | ||
27 | /* | |
28 | * Note: to minimize their overhead, mm maintains hiwater_vm and | |
29 | * hiwater_rss only when about to *lower* total_vm or rss. Any | |
30 | * collector of these hiwater stats must therefore get total_vm | |
31 | * and rss too, which will usually be the higher. Barriers? not | |
32 | * worth the effort, such snapshots can always be inconsistent. | |
33 | */ | |
34 | hiwater_vm = total_vm = mm->total_vm; | |
35 | if (hiwater_vm < mm->hiwater_vm) | |
36 | hiwater_vm = mm->hiwater_vm; | |
37 | hiwater_rss = total_rss = get_mm_rss(mm); | |
38 | if (hiwater_rss < mm->hiwater_rss) | |
39 | hiwater_rss = mm->hiwater_rss; | |
1da177e4 LT |
40 | |
41 | data = mm->total_vm - mm->shared_vm - mm->stack_vm; | |
42 | text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10; | |
43 | lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text; | |
b084d435 | 44 | swap = get_mm_counter(mm, MM_SWAPENTS); |
df5f8314 | 45 | seq_printf(m, |
365e9c87 | 46 | "VmPeak:\t%8lu kB\n" |
1da177e4 LT |
47 | "VmSize:\t%8lu kB\n" |
48 | "VmLck:\t%8lu kB\n" | |
bc3e53f6 | 49 | "VmPin:\t%8lu kB\n" |
365e9c87 | 50 | "VmHWM:\t%8lu kB\n" |
1da177e4 LT |
51 | "VmRSS:\t%8lu kB\n" |
52 | "VmData:\t%8lu kB\n" | |
53 | "VmStk:\t%8lu kB\n" | |
54 | "VmExe:\t%8lu kB\n" | |
55 | "VmLib:\t%8lu kB\n" | |
b084d435 KH |
56 | "VmPTE:\t%8lu kB\n" |
57 | "VmSwap:\t%8lu kB\n", | |
365e9c87 | 58 | hiwater_vm << (PAGE_SHIFT-10), |
314e51b9 | 59 | total_vm << (PAGE_SHIFT-10), |
1da177e4 | 60 | mm->locked_vm << (PAGE_SHIFT-10), |
bc3e53f6 | 61 | mm->pinned_vm << (PAGE_SHIFT-10), |
365e9c87 HD |
62 | hiwater_rss << (PAGE_SHIFT-10), |
63 | total_rss << (PAGE_SHIFT-10), | |
1da177e4 LT |
64 | data << (PAGE_SHIFT-10), |
65 | mm->stack_vm << (PAGE_SHIFT-10), text, lib, | |
e1f56c89 KS |
66 | (PTRS_PER_PTE * sizeof(pte_t) * |
67 | atomic_long_read(&mm->nr_ptes)) >> 10, | |
b084d435 | 68 | swap << (PAGE_SHIFT-10)); |
1da177e4 LT |
69 | } |
70 | ||
71 | unsigned long task_vsize(struct mm_struct *mm) | |
72 | { | |
73 | return PAGE_SIZE * mm->total_vm; | |
74 | } | |
75 | ||
a2ade7b6 AD |
76 | unsigned long task_statm(struct mm_struct *mm, |
77 | unsigned long *shared, unsigned long *text, | |
78 | unsigned long *data, unsigned long *resident) | |
1da177e4 | 79 | { |
d559db08 | 80 | *shared = get_mm_counter(mm, MM_FILEPAGES); |
1da177e4 LT |
81 | *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) |
82 | >> PAGE_SHIFT; | |
83 | *data = mm->total_vm - mm->shared_vm; | |
d559db08 | 84 | *resident = *shared + get_mm_counter(mm, MM_ANONPAGES); |
1da177e4 LT |
85 | return mm->total_vm; |
86 | } | |
87 | ||
9e781440 KH |
88 | #ifdef CONFIG_NUMA |
89 | /* | |
90 | * These functions are for numa_maps but called in generic **maps seq_file | |
91 | * ->start(), ->stop() ops. | |
92 | * | |
93 | * numa_maps scans all vmas under mmap_sem and checks their mempolicy. | |
94 | * Each mempolicy object is controlled by reference counting. The problem here | |
95 | * is how to avoid accessing dead mempolicy object. | |
96 | * | |
97 | * Because we're holding mmap_sem while reading seq_file, it's safe to access | |
98 | * each vma's mempolicy, no vma objects will never drop refs to mempolicy. | |
99 | * | |
100 | * A task's mempolicy (task->mempolicy) has different behavior. task->mempolicy | |
101 | * is set and replaced under mmap_sem but unrefed and cleared under task_lock(). | |
102 | * So, without task_lock(), we cannot trust get_vma_policy() because we cannot | |
103 | * gurantee the task never exits under us. But taking task_lock() around | |
104 | * get_vma_plicy() causes lock order problem. | |
105 | * | |
106 | * To access task->mempolicy without lock, we hold a reference count of an | |
107 | * object pointed by task->mempolicy and remember it. This will guarantee | |
108 | * that task->mempolicy points to an alive object or NULL in numa_maps accesses. | |
109 | */ | |
110 | static void hold_task_mempolicy(struct proc_maps_private *priv) | |
111 | { | |
112 | struct task_struct *task = priv->task; | |
113 | ||
114 | task_lock(task); | |
115 | priv->task_mempolicy = task->mempolicy; | |
116 | mpol_get(priv->task_mempolicy); | |
117 | task_unlock(task); | |
118 | } | |
119 | static void release_task_mempolicy(struct proc_maps_private *priv) | |
120 | { | |
121 | mpol_put(priv->task_mempolicy); | |
122 | } | |
123 | #else | |
124 | static void hold_task_mempolicy(struct proc_maps_private *priv) | |
125 | { | |
126 | } | |
127 | static void release_task_mempolicy(struct proc_maps_private *priv) | |
128 | { | |
129 | } | |
130 | #endif | |
131 | ||
a6198797 MM |
132 | static void vma_stop(struct proc_maps_private *priv, struct vm_area_struct *vma) |
133 | { | |
134 | if (vma && vma != priv->tail_vma) { | |
135 | struct mm_struct *mm = vma->vm_mm; | |
9e781440 | 136 | release_task_mempolicy(priv); |
a6198797 MM |
137 | up_read(&mm->mmap_sem); |
138 | mmput(mm); | |
139 | } | |
140 | } | |
ec4dd3eb | 141 | |
a6198797 | 142 | static void *m_start(struct seq_file *m, loff_t *pos) |
e070ad49 | 143 | { |
a6198797 MM |
144 | struct proc_maps_private *priv = m->private; |
145 | unsigned long last_addr = m->version; | |
146 | struct mm_struct *mm; | |
147 | struct vm_area_struct *vma, *tail_vma = NULL; | |
148 | loff_t l = *pos; | |
149 | ||
150 | /* Clear the per syscall fields in priv */ | |
151 | priv->task = NULL; | |
152 | priv->tail_vma = NULL; | |
153 | ||
154 | /* | |
155 | * We remember last_addr rather than next_addr to hit with | |
615d6e87 | 156 | * vmacache most of the time. We have zero last_addr at |
a6198797 MM |
157 | * the beginning and also after lseek. We will have -1 last_addr |
158 | * after the end of the vmas. | |
159 | */ | |
160 | ||
161 | if (last_addr == -1UL) | |
162 | return NULL; | |
163 | ||
164 | priv->task = get_pid_task(priv->pid, PIDTYPE_PID); | |
165 | if (!priv->task) | |
ec6fd8a4 | 166 | return ERR_PTR(-ESRCH); |
a6198797 | 167 | |
e7dcd999 | 168 | mm = mm_access(priv->task, PTRACE_MODE_READ); |
ec6fd8a4 AV |
169 | if (!mm || IS_ERR(mm)) |
170 | return mm; | |
00f89d21 | 171 | down_read(&mm->mmap_sem); |
a6198797 | 172 | |
31db58b3 | 173 | tail_vma = get_gate_vma(priv->task->mm); |
a6198797 | 174 | priv->tail_vma = tail_vma; |
9e781440 | 175 | hold_task_mempolicy(priv); |
a6198797 MM |
176 | /* Start with last addr hint */ |
177 | vma = find_vma(mm, last_addr); | |
178 | if (last_addr && vma) { | |
179 | vma = vma->vm_next; | |
180 | goto out; | |
181 | } | |
182 | ||
183 | /* | |
184 | * Check the vma index is within the range and do | |
185 | * sequential scan until m_index. | |
186 | */ | |
187 | vma = NULL; | |
188 | if ((unsigned long)l < mm->map_count) { | |
189 | vma = mm->mmap; | |
190 | while (l-- && vma) | |
191 | vma = vma->vm_next; | |
192 | goto out; | |
193 | } | |
194 | ||
195 | if (l != mm->map_count) | |
196 | tail_vma = NULL; /* After gate vma */ | |
197 | ||
198 | out: | |
199 | if (vma) | |
200 | return vma; | |
201 | ||
9e781440 | 202 | release_task_mempolicy(priv); |
a6198797 MM |
203 | /* End of vmas has been reached */ |
204 | m->version = (tail_vma != NULL)? 0: -1UL; | |
205 | up_read(&mm->mmap_sem); | |
206 | mmput(mm); | |
207 | return tail_vma; | |
208 | } | |
209 | ||
210 | static void *m_next(struct seq_file *m, void *v, loff_t *pos) | |
211 | { | |
212 | struct proc_maps_private *priv = m->private; | |
213 | struct vm_area_struct *vma = v; | |
214 | struct vm_area_struct *tail_vma = priv->tail_vma; | |
215 | ||
216 | (*pos)++; | |
217 | if (vma && (vma != tail_vma) && vma->vm_next) | |
218 | return vma->vm_next; | |
219 | vma_stop(priv, vma); | |
220 | return (vma != tail_vma)? tail_vma: NULL; | |
221 | } | |
222 | ||
223 | static void m_stop(struct seq_file *m, void *v) | |
224 | { | |
225 | struct proc_maps_private *priv = m->private; | |
226 | struct vm_area_struct *vma = v; | |
227 | ||
76597cd3 LT |
228 | if (!IS_ERR(vma)) |
229 | vma_stop(priv, vma); | |
a6198797 MM |
230 | if (priv->task) |
231 | put_task_struct(priv->task); | |
232 | } | |
233 | ||
234 | static int do_maps_open(struct inode *inode, struct file *file, | |
03a44825 | 235 | const struct seq_operations *ops) |
a6198797 MM |
236 | { |
237 | struct proc_maps_private *priv; | |
238 | int ret = -ENOMEM; | |
239 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
240 | if (priv) { | |
241 | priv->pid = proc_pid(inode); | |
242 | ret = seq_open(file, ops); | |
243 | if (!ret) { | |
244 | struct seq_file *m = file->private_data; | |
245 | m->private = priv; | |
246 | } else { | |
247 | kfree(priv); | |
248 | } | |
249 | } | |
250 | return ret; | |
251 | } | |
e070ad49 | 252 | |
b7643757 SP |
253 | static void |
254 | show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid) | |
1da177e4 | 255 | { |
e070ad49 ML |
256 | struct mm_struct *mm = vma->vm_mm; |
257 | struct file *file = vma->vm_file; | |
b7643757 SP |
258 | struct proc_maps_private *priv = m->private; |
259 | struct task_struct *task = priv->task; | |
ca16d140 | 260 | vm_flags_t flags = vma->vm_flags; |
1da177e4 | 261 | unsigned long ino = 0; |
6260a4b0 | 262 | unsigned long long pgoff = 0; |
a09a79f6 | 263 | unsigned long start, end; |
1da177e4 | 264 | dev_t dev = 0; |
b7643757 | 265 | const char *name = NULL; |
1da177e4 LT |
266 | |
267 | if (file) { | |
496ad9aa | 268 | struct inode *inode = file_inode(vma->vm_file); |
1da177e4 LT |
269 | dev = inode->i_sb->s_dev; |
270 | ino = inode->i_ino; | |
6260a4b0 | 271 | pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT; |
1da177e4 LT |
272 | } |
273 | ||
d7824370 LT |
274 | /* We don't show the stack guard page in /proc/maps */ |
275 | start = vma->vm_start; | |
a09a79f6 MP |
276 | if (stack_guard_page_start(vma, start)) |
277 | start += PAGE_SIZE; | |
278 | end = vma->vm_end; | |
279 | if (stack_guard_page_end(vma, end)) | |
280 | end -= PAGE_SIZE; | |
d7824370 | 281 | |
652586df TH |
282 | seq_setwidth(m, 25 + sizeof(void *) * 6 - 1); |
283 | seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu ", | |
d7824370 | 284 | start, |
a09a79f6 | 285 | end, |
1da177e4 LT |
286 | flags & VM_READ ? 'r' : '-', |
287 | flags & VM_WRITE ? 'w' : '-', | |
288 | flags & VM_EXEC ? 'x' : '-', | |
289 | flags & VM_MAYSHARE ? 's' : 'p', | |
6260a4b0 | 290 | pgoff, |
652586df | 291 | MAJOR(dev), MINOR(dev), ino); |
1da177e4 LT |
292 | |
293 | /* | |
294 | * Print the dentry name for named mappings, and a | |
295 | * special [heap] marker for the heap: | |
296 | */ | |
e070ad49 | 297 | if (file) { |
652586df | 298 | seq_pad(m, ' '); |
c32c2f63 | 299 | seq_path(m, &file->f_path, "\n"); |
b7643757 SP |
300 | goto done; |
301 | } | |
302 | ||
78d683e8 AL |
303 | if (vma->vm_ops && vma->vm_ops->name) { |
304 | name = vma->vm_ops->name(vma); | |
305 | if (name) | |
306 | goto done; | |
307 | } | |
308 | ||
b7643757 SP |
309 | name = arch_vma_name(vma); |
310 | if (!name) { | |
311 | pid_t tid; | |
312 | ||
313 | if (!mm) { | |
314 | name = "[vdso]"; | |
315 | goto done; | |
316 | } | |
317 | ||
318 | if (vma->vm_start <= mm->brk && | |
319 | vma->vm_end >= mm->start_brk) { | |
320 | name = "[heap]"; | |
321 | goto done; | |
322 | } | |
323 | ||
324 | tid = vm_is_stack(task, vma, is_pid); | |
325 | ||
326 | if (tid != 0) { | |
327 | /* | |
328 | * Thread stack in /proc/PID/task/TID/maps or | |
329 | * the main process stack. | |
330 | */ | |
331 | if (!is_pid || (vma->vm_start <= mm->start_stack && | |
332 | vma->vm_end >= mm->start_stack)) { | |
333 | name = "[stack]"; | |
e6e5494c | 334 | } else { |
b7643757 | 335 | /* Thread stack in /proc/PID/maps */ |
652586df | 336 | seq_pad(m, ' '); |
b7643757 | 337 | seq_printf(m, "[stack:%d]", tid); |
1da177e4 | 338 | } |
e6e5494c | 339 | } |
b7643757 SP |
340 | } |
341 | ||
342 | done: | |
343 | if (name) { | |
652586df | 344 | seq_pad(m, ' '); |
b7643757 | 345 | seq_puts(m, name); |
1da177e4 LT |
346 | } |
347 | seq_putc(m, '\n'); | |
7c88db0c JK |
348 | } |
349 | ||
b7643757 | 350 | static int show_map(struct seq_file *m, void *v, int is_pid) |
7c88db0c JK |
351 | { |
352 | struct vm_area_struct *vma = v; | |
353 | struct proc_maps_private *priv = m->private; | |
354 | struct task_struct *task = priv->task; | |
355 | ||
b7643757 | 356 | show_map_vma(m, vma, is_pid); |
e070ad49 | 357 | |
e070ad49 | 358 | if (m->count < m->size) /* vma is copied successfully */ |
31db58b3 SW |
359 | m->version = (vma != get_gate_vma(task->mm)) |
360 | ? vma->vm_start : 0; | |
1da177e4 LT |
361 | return 0; |
362 | } | |
363 | ||
b7643757 SP |
364 | static int show_pid_map(struct seq_file *m, void *v) |
365 | { | |
366 | return show_map(m, v, 1); | |
367 | } | |
368 | ||
369 | static int show_tid_map(struct seq_file *m, void *v) | |
370 | { | |
371 | return show_map(m, v, 0); | |
372 | } | |
373 | ||
03a44825 | 374 | static const struct seq_operations proc_pid_maps_op = { |
a6198797 MM |
375 | .start = m_start, |
376 | .next = m_next, | |
377 | .stop = m_stop, | |
b7643757 SP |
378 | .show = show_pid_map |
379 | }; | |
380 | ||
381 | static const struct seq_operations proc_tid_maps_op = { | |
382 | .start = m_start, | |
383 | .next = m_next, | |
384 | .stop = m_stop, | |
385 | .show = show_tid_map | |
a6198797 MM |
386 | }; |
387 | ||
b7643757 | 388 | static int pid_maps_open(struct inode *inode, struct file *file) |
a6198797 MM |
389 | { |
390 | return do_maps_open(inode, file, &proc_pid_maps_op); | |
391 | } | |
392 | ||
b7643757 SP |
393 | static int tid_maps_open(struct inode *inode, struct file *file) |
394 | { | |
395 | return do_maps_open(inode, file, &proc_tid_maps_op); | |
396 | } | |
397 | ||
398 | const struct file_operations proc_pid_maps_operations = { | |
399 | .open = pid_maps_open, | |
400 | .read = seq_read, | |
401 | .llseek = seq_lseek, | |
402 | .release = seq_release_private, | |
403 | }; | |
404 | ||
405 | const struct file_operations proc_tid_maps_operations = { | |
406 | .open = tid_maps_open, | |
a6198797 MM |
407 | .read = seq_read, |
408 | .llseek = seq_lseek, | |
409 | .release = seq_release_private, | |
410 | }; | |
411 | ||
412 | /* | |
413 | * Proportional Set Size(PSS): my share of RSS. | |
414 | * | |
415 | * PSS of a process is the count of pages it has in memory, where each | |
416 | * page is divided by the number of processes sharing it. So if a | |
417 | * process has 1000 pages all to itself, and 1000 shared with one other | |
418 | * process, its PSS will be 1500. | |
419 | * | |
420 | * To keep (accumulated) division errors low, we adopt a 64bit | |
421 | * fixed-point pss counter to minimize division errors. So (pss >> | |
422 | * PSS_SHIFT) would be the real byte count. | |
423 | * | |
424 | * A shift of 12 before division means (assuming 4K page size): | |
425 | * - 1M 3-user-pages add up to 8KB errors; | |
426 | * - supports mapcount up to 2^24, or 16M; | |
427 | * - supports PSS up to 2^52 bytes, or 4PB. | |
428 | */ | |
429 | #define PSS_SHIFT 12 | |
430 | ||
1e883281 | 431 | #ifdef CONFIG_PROC_PAGE_MONITOR |
214e471f | 432 | struct mem_size_stats { |
a6198797 MM |
433 | struct vm_area_struct *vma; |
434 | unsigned long resident; | |
435 | unsigned long shared_clean; | |
436 | unsigned long shared_dirty; | |
437 | unsigned long private_clean; | |
438 | unsigned long private_dirty; | |
439 | unsigned long referenced; | |
b40d4f84 | 440 | unsigned long anonymous; |
4031a219 | 441 | unsigned long anonymous_thp; |
214e471f | 442 | unsigned long swap; |
bca15543 | 443 | unsigned long nonlinear; |
a6198797 MM |
444 | u64 pss; |
445 | }; | |
446 | ||
ae11c4d9 DH |
447 | |
448 | static void smaps_pte_entry(pte_t ptent, unsigned long addr, | |
3c9acc78 | 449 | unsigned long ptent_size, struct mm_walk *walk) |
ae11c4d9 DH |
450 | { |
451 | struct mem_size_stats *mss = walk->private; | |
452 | struct vm_area_struct *vma = mss->vma; | |
bca15543 | 453 | pgoff_t pgoff = linear_page_index(vma, addr); |
b1d4d9e0 | 454 | struct page *page = NULL; |
ae11c4d9 DH |
455 | int mapcount; |
456 | ||
b1d4d9e0 KK |
457 | if (pte_present(ptent)) { |
458 | page = vm_normal_page(vma, addr, ptent); | |
459 | } else if (is_swap_pte(ptent)) { | |
460 | swp_entry_t swpent = pte_to_swp_entry(ptent); | |
ae11c4d9 | 461 | |
b1d4d9e0 KK |
462 | if (!non_swap_entry(swpent)) |
463 | mss->swap += ptent_size; | |
464 | else if (is_migration_entry(swpent)) | |
465 | page = migration_entry_to_page(swpent); | |
bca15543 KK |
466 | } else if (pte_file(ptent)) { |
467 | if (pte_to_pgoff(ptent) != pgoff) | |
468 | mss->nonlinear += ptent_size; | |
b1d4d9e0 | 469 | } |
ae11c4d9 | 470 | |
ae11c4d9 DH |
471 | if (!page) |
472 | return; | |
473 | ||
474 | if (PageAnon(page)) | |
3c9acc78 | 475 | mss->anonymous += ptent_size; |
ae11c4d9 | 476 | |
bca15543 KK |
477 | if (page->index != pgoff) |
478 | mss->nonlinear += ptent_size; | |
479 | ||
3c9acc78 | 480 | mss->resident += ptent_size; |
ae11c4d9 DH |
481 | /* Accumulate the size in pages that have been accessed. */ |
482 | if (pte_young(ptent) || PageReferenced(page)) | |
3c9acc78 | 483 | mss->referenced += ptent_size; |
ae11c4d9 DH |
484 | mapcount = page_mapcount(page); |
485 | if (mapcount >= 2) { | |
486 | if (pte_dirty(ptent) || PageDirty(page)) | |
3c9acc78 | 487 | mss->shared_dirty += ptent_size; |
ae11c4d9 | 488 | else |
3c9acc78 DH |
489 | mss->shared_clean += ptent_size; |
490 | mss->pss += (ptent_size << PSS_SHIFT) / mapcount; | |
ae11c4d9 DH |
491 | } else { |
492 | if (pte_dirty(ptent) || PageDirty(page)) | |
3c9acc78 | 493 | mss->private_dirty += ptent_size; |
ae11c4d9 | 494 | else |
3c9acc78 DH |
495 | mss->private_clean += ptent_size; |
496 | mss->pss += (ptent_size << PSS_SHIFT); | |
ae11c4d9 DH |
497 | } |
498 | } | |
499 | ||
b3ae5acb | 500 | static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, |
2165009b | 501 | struct mm_walk *walk) |
e070ad49 | 502 | { |
2165009b | 503 | struct mem_size_stats *mss = walk->private; |
b3ae5acb | 504 | struct vm_area_struct *vma = mss->vma; |
ae11c4d9 | 505 | pte_t *pte; |
705e87c0 | 506 | spinlock_t *ptl; |
e070ad49 | 507 | |
bf929152 | 508 | if (pmd_trans_huge_lock(pmd, vma, &ptl) == 1) { |
025c5b24 | 509 | smaps_pte_entry(*(pte_t *)pmd, addr, HPAGE_PMD_SIZE, walk); |
bf929152 | 510 | spin_unlock(ptl); |
025c5b24 NH |
511 | mss->anonymous_thp += HPAGE_PMD_SIZE; |
512 | return 0; | |
22e057c5 | 513 | } |
1a5a9906 AA |
514 | |
515 | if (pmd_trans_unstable(pmd)) | |
516 | return 0; | |
22e057c5 DH |
517 | /* |
518 | * The mmap_sem held all the way back in m_start() is what | |
519 | * keeps khugepaged out of here and from collapsing things | |
520 | * in here. | |
521 | */ | |
705e87c0 | 522 | pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); |
ae11c4d9 | 523 | for (; addr != end; pte++, addr += PAGE_SIZE) |
3c9acc78 | 524 | smaps_pte_entry(*pte, addr, PAGE_SIZE, walk); |
705e87c0 HD |
525 | pte_unmap_unlock(pte - 1, ptl); |
526 | cond_resched(); | |
b3ae5acb | 527 | return 0; |
e070ad49 ML |
528 | } |
529 | ||
834f82e2 CG |
530 | static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma) |
531 | { | |
532 | /* | |
533 | * Don't forget to update Documentation/ on changes. | |
534 | */ | |
535 | static const char mnemonics[BITS_PER_LONG][2] = { | |
536 | /* | |
537 | * In case if we meet a flag we don't know about. | |
538 | */ | |
539 | [0 ... (BITS_PER_LONG-1)] = "??", | |
540 | ||
541 | [ilog2(VM_READ)] = "rd", | |
542 | [ilog2(VM_WRITE)] = "wr", | |
543 | [ilog2(VM_EXEC)] = "ex", | |
544 | [ilog2(VM_SHARED)] = "sh", | |
545 | [ilog2(VM_MAYREAD)] = "mr", | |
546 | [ilog2(VM_MAYWRITE)] = "mw", | |
547 | [ilog2(VM_MAYEXEC)] = "me", | |
548 | [ilog2(VM_MAYSHARE)] = "ms", | |
549 | [ilog2(VM_GROWSDOWN)] = "gd", | |
550 | [ilog2(VM_PFNMAP)] = "pf", | |
551 | [ilog2(VM_DENYWRITE)] = "dw", | |
552 | [ilog2(VM_LOCKED)] = "lo", | |
553 | [ilog2(VM_IO)] = "io", | |
554 | [ilog2(VM_SEQ_READ)] = "sr", | |
555 | [ilog2(VM_RAND_READ)] = "rr", | |
556 | [ilog2(VM_DONTCOPY)] = "dc", | |
557 | [ilog2(VM_DONTEXPAND)] = "de", | |
558 | [ilog2(VM_ACCOUNT)] = "ac", | |
559 | [ilog2(VM_NORESERVE)] = "nr", | |
560 | [ilog2(VM_HUGETLB)] = "ht", | |
561 | [ilog2(VM_NONLINEAR)] = "nl", | |
562 | [ilog2(VM_ARCH_1)] = "ar", | |
563 | [ilog2(VM_DONTDUMP)] = "dd", | |
ec8e41ae NH |
564 | #ifdef CONFIG_MEM_SOFT_DIRTY |
565 | [ilog2(VM_SOFTDIRTY)] = "sd", | |
566 | #endif | |
834f82e2 CG |
567 | [ilog2(VM_MIXEDMAP)] = "mm", |
568 | [ilog2(VM_HUGEPAGE)] = "hg", | |
569 | [ilog2(VM_NOHUGEPAGE)] = "nh", | |
570 | [ilog2(VM_MERGEABLE)] = "mg", | |
571 | }; | |
572 | size_t i; | |
573 | ||
574 | seq_puts(m, "VmFlags: "); | |
575 | for (i = 0; i < BITS_PER_LONG; i++) { | |
576 | if (vma->vm_flags & (1UL << i)) { | |
577 | seq_printf(m, "%c%c ", | |
578 | mnemonics[i][0], mnemonics[i][1]); | |
579 | } | |
580 | } | |
581 | seq_putc(m, '\n'); | |
582 | } | |
583 | ||
b7643757 | 584 | static int show_smap(struct seq_file *m, void *v, int is_pid) |
e070ad49 | 585 | { |
7c88db0c JK |
586 | struct proc_maps_private *priv = m->private; |
587 | struct task_struct *task = priv->task; | |
e070ad49 | 588 | struct vm_area_struct *vma = v; |
e070ad49 | 589 | struct mem_size_stats mss; |
2165009b DH |
590 | struct mm_walk smaps_walk = { |
591 | .pmd_entry = smaps_pte_range, | |
592 | .mm = vma->vm_mm, | |
593 | .private = &mss, | |
594 | }; | |
e070ad49 ML |
595 | |
596 | memset(&mss, 0, sizeof mss); | |
b3ae5acb | 597 | mss.vma = vma; |
d82ef020 | 598 | /* mmap_sem is held in m_start */ |
5ddfae16 | 599 | if (vma->vm_mm && !is_vm_hugetlb_page(vma)) |
2165009b | 600 | walk_page_range(vma->vm_start, vma->vm_end, &smaps_walk); |
4752c369 | 601 | |
b7643757 | 602 | show_map_vma(m, vma, is_pid); |
4752c369 MM |
603 | |
604 | seq_printf(m, | |
605 | "Size: %8lu kB\n" | |
606 | "Rss: %8lu kB\n" | |
607 | "Pss: %8lu kB\n" | |
608 | "Shared_Clean: %8lu kB\n" | |
609 | "Shared_Dirty: %8lu kB\n" | |
610 | "Private_Clean: %8lu kB\n" | |
611 | "Private_Dirty: %8lu kB\n" | |
214e471f | 612 | "Referenced: %8lu kB\n" |
b40d4f84 | 613 | "Anonymous: %8lu kB\n" |
4031a219 | 614 | "AnonHugePages: %8lu kB\n" |
08fba699 | 615 | "Swap: %8lu kB\n" |
3340289d | 616 | "KernelPageSize: %8lu kB\n" |
2d90508f NK |
617 | "MMUPageSize: %8lu kB\n" |
618 | "Locked: %8lu kB\n", | |
4752c369 MM |
619 | (vma->vm_end - vma->vm_start) >> 10, |
620 | mss.resident >> 10, | |
621 | (unsigned long)(mss.pss >> (10 + PSS_SHIFT)), | |
622 | mss.shared_clean >> 10, | |
623 | mss.shared_dirty >> 10, | |
624 | mss.private_clean >> 10, | |
625 | mss.private_dirty >> 10, | |
214e471f | 626 | mss.referenced >> 10, |
b40d4f84 | 627 | mss.anonymous >> 10, |
4031a219 | 628 | mss.anonymous_thp >> 10, |
08fba699 | 629 | mss.swap >> 10, |
3340289d | 630 | vma_kernel_pagesize(vma) >> 10, |
2d90508f NK |
631 | vma_mmu_pagesize(vma) >> 10, |
632 | (vma->vm_flags & VM_LOCKED) ? | |
633 | (unsigned long)(mss.pss >> (10 + PSS_SHIFT)) : 0); | |
4752c369 | 634 | |
bca15543 KK |
635 | if (vma->vm_flags & VM_NONLINEAR) |
636 | seq_printf(m, "Nonlinear: %8lu kB\n", | |
637 | mss.nonlinear >> 10); | |
638 | ||
834f82e2 CG |
639 | show_smap_vma_flags(m, vma); |
640 | ||
7c88db0c | 641 | if (m->count < m->size) /* vma is copied successfully */ |
31db58b3 SW |
642 | m->version = (vma != get_gate_vma(task->mm)) |
643 | ? vma->vm_start : 0; | |
7c88db0c | 644 | return 0; |
e070ad49 ML |
645 | } |
646 | ||
b7643757 SP |
647 | static int show_pid_smap(struct seq_file *m, void *v) |
648 | { | |
649 | return show_smap(m, v, 1); | |
650 | } | |
651 | ||
652 | static int show_tid_smap(struct seq_file *m, void *v) | |
653 | { | |
654 | return show_smap(m, v, 0); | |
655 | } | |
656 | ||
03a44825 | 657 | static const struct seq_operations proc_pid_smaps_op = { |
a6198797 MM |
658 | .start = m_start, |
659 | .next = m_next, | |
660 | .stop = m_stop, | |
b7643757 SP |
661 | .show = show_pid_smap |
662 | }; | |
663 | ||
664 | static const struct seq_operations proc_tid_smaps_op = { | |
665 | .start = m_start, | |
666 | .next = m_next, | |
667 | .stop = m_stop, | |
668 | .show = show_tid_smap | |
a6198797 MM |
669 | }; |
670 | ||
b7643757 | 671 | static int pid_smaps_open(struct inode *inode, struct file *file) |
a6198797 MM |
672 | { |
673 | return do_maps_open(inode, file, &proc_pid_smaps_op); | |
674 | } | |
675 | ||
b7643757 SP |
676 | static int tid_smaps_open(struct inode *inode, struct file *file) |
677 | { | |
678 | return do_maps_open(inode, file, &proc_tid_smaps_op); | |
679 | } | |
680 | ||
681 | const struct file_operations proc_pid_smaps_operations = { | |
682 | .open = pid_smaps_open, | |
683 | .read = seq_read, | |
684 | .llseek = seq_lseek, | |
685 | .release = seq_release_private, | |
686 | }; | |
687 | ||
688 | const struct file_operations proc_tid_smaps_operations = { | |
689 | .open = tid_smaps_open, | |
a6198797 MM |
690 | .read = seq_read, |
691 | .llseek = seq_lseek, | |
692 | .release = seq_release_private, | |
693 | }; | |
694 | ||
541c237c PE |
695 | /* |
696 | * We do not want to have constant page-shift bits sitting in | |
697 | * pagemap entries and are about to reuse them some time soon. | |
698 | * | |
699 | * Here's the "migration strategy": | |
700 | * 1. when the system boots these bits remain what they are, | |
701 | * but a warning about future change is printed in log; | |
702 | * 2. once anyone clears soft-dirty bits via clear_refs file, | |
703 | * these flag is set to denote, that user is aware of the | |
704 | * new API and those page-shift bits change their meaning. | |
705 | * The respective warning is printed in dmesg; | |
706 | * 3. In a couple of releases we will remove all the mentions | |
707 | * of page-shift in pagemap entries. | |
708 | */ | |
709 | ||
710 | static bool soft_dirty_cleared __read_mostly; | |
711 | ||
040fa020 PE |
712 | enum clear_refs_types { |
713 | CLEAR_REFS_ALL = 1, | |
714 | CLEAR_REFS_ANON, | |
715 | CLEAR_REFS_MAPPED, | |
0f8975ec | 716 | CLEAR_REFS_SOFT_DIRTY, |
040fa020 PE |
717 | CLEAR_REFS_LAST, |
718 | }; | |
719 | ||
af9de7eb PE |
720 | struct clear_refs_private { |
721 | struct vm_area_struct *vma; | |
0f8975ec | 722 | enum clear_refs_types type; |
af9de7eb PE |
723 | }; |
724 | ||
0f8975ec PE |
725 | static inline void clear_soft_dirty(struct vm_area_struct *vma, |
726 | unsigned long addr, pte_t *pte) | |
727 | { | |
728 | #ifdef CONFIG_MEM_SOFT_DIRTY | |
729 | /* | |
730 | * The soft-dirty tracker uses #PF-s to catch writes | |
731 | * to pages, so write-protect the pte as well. See the | |
732 | * Documentation/vm/soft-dirty.txt for full description | |
733 | * of how soft-dirty works. | |
734 | */ | |
735 | pte_t ptent = *pte; | |
179ef71c CG |
736 | |
737 | if (pte_present(ptent)) { | |
738 | ptent = pte_wrprotect(ptent); | |
739 | ptent = pte_clear_flags(ptent, _PAGE_SOFT_DIRTY); | |
740 | } else if (is_swap_pte(ptent)) { | |
741 | ptent = pte_swp_clear_soft_dirty(ptent); | |
41bb3476 CG |
742 | } else if (pte_file(ptent)) { |
743 | ptent = pte_file_clear_soft_dirty(ptent); | |
179ef71c CG |
744 | } |
745 | ||
0f8975ec PE |
746 | set_pte_at(vma->vm_mm, addr, pte, ptent); |
747 | #endif | |
748 | } | |
749 | ||
a6198797 | 750 | static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr, |
2165009b | 751 | unsigned long end, struct mm_walk *walk) |
a6198797 | 752 | { |
af9de7eb PE |
753 | struct clear_refs_private *cp = walk->private; |
754 | struct vm_area_struct *vma = cp->vma; | |
a6198797 MM |
755 | pte_t *pte, ptent; |
756 | spinlock_t *ptl; | |
757 | struct page *page; | |
758 | ||
e180377f | 759 | split_huge_page_pmd(vma, addr, pmd); |
1a5a9906 AA |
760 | if (pmd_trans_unstable(pmd)) |
761 | return 0; | |
03319327 | 762 | |
a6198797 MM |
763 | pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); |
764 | for (; addr != end; pte++, addr += PAGE_SIZE) { | |
765 | ptent = *pte; | |
a6198797 | 766 | |
0f8975ec PE |
767 | if (cp->type == CLEAR_REFS_SOFT_DIRTY) { |
768 | clear_soft_dirty(vma, addr, pte); | |
769 | continue; | |
770 | } | |
771 | ||
179ef71c CG |
772 | if (!pte_present(ptent)) |
773 | continue; | |
774 | ||
a6198797 MM |
775 | page = vm_normal_page(vma, addr, ptent); |
776 | if (!page) | |
777 | continue; | |
778 | ||
779 | /* Clear accessed and referenced bits. */ | |
780 | ptep_test_and_clear_young(vma, addr, pte); | |
781 | ClearPageReferenced(page); | |
782 | } | |
783 | pte_unmap_unlock(pte - 1, ptl); | |
784 | cond_resched(); | |
785 | return 0; | |
786 | } | |
787 | ||
f248dcb3 MM |
788 | static ssize_t clear_refs_write(struct file *file, const char __user *buf, |
789 | size_t count, loff_t *ppos) | |
b813e931 | 790 | { |
f248dcb3 | 791 | struct task_struct *task; |
fb92a4b0 | 792 | char buffer[PROC_NUMBUF]; |
f248dcb3 | 793 | struct mm_struct *mm; |
b813e931 | 794 | struct vm_area_struct *vma; |
040fa020 PE |
795 | enum clear_refs_types type; |
796 | int itype; | |
0a8cb8e3 | 797 | int rv; |
b813e931 | 798 | |
f248dcb3 MM |
799 | memset(buffer, 0, sizeof(buffer)); |
800 | if (count > sizeof(buffer) - 1) | |
801 | count = sizeof(buffer) - 1; | |
802 | if (copy_from_user(buffer, buf, count)) | |
803 | return -EFAULT; | |
040fa020 | 804 | rv = kstrtoint(strstrip(buffer), 10, &itype); |
0a8cb8e3 AD |
805 | if (rv < 0) |
806 | return rv; | |
040fa020 PE |
807 | type = (enum clear_refs_types)itype; |
808 | if (type < CLEAR_REFS_ALL || type >= CLEAR_REFS_LAST) | |
f248dcb3 | 809 | return -EINVAL; |
541c237c PE |
810 | |
811 | if (type == CLEAR_REFS_SOFT_DIRTY) { | |
812 | soft_dirty_cleared = true; | |
c86c97ff CG |
813 | pr_warn_once("The pagemap bits 55-60 has changed their meaning!" |
814 | " See the linux/Documentation/vm/pagemap.txt for " | |
815 | "details.\n"); | |
541c237c PE |
816 | } |
817 | ||
496ad9aa | 818 | task = get_proc_task(file_inode(file)); |
f248dcb3 MM |
819 | if (!task) |
820 | return -ESRCH; | |
821 | mm = get_task_mm(task); | |
822 | if (mm) { | |
af9de7eb | 823 | struct clear_refs_private cp = { |
0f8975ec | 824 | .type = type, |
af9de7eb | 825 | }; |
20cbc972 AM |
826 | struct mm_walk clear_refs_walk = { |
827 | .pmd_entry = clear_refs_pte_range, | |
828 | .mm = mm, | |
af9de7eb | 829 | .private = &cp, |
20cbc972 | 830 | }; |
f248dcb3 | 831 | down_read(&mm->mmap_sem); |
0f8975ec PE |
832 | if (type == CLEAR_REFS_SOFT_DIRTY) |
833 | mmu_notifier_invalidate_range_start(mm, 0, -1); | |
2165009b | 834 | for (vma = mm->mmap; vma; vma = vma->vm_next) { |
af9de7eb | 835 | cp.vma = vma; |
398499d5 MB |
836 | if (is_vm_hugetlb_page(vma)) |
837 | continue; | |
838 | /* | |
839 | * Writing 1 to /proc/pid/clear_refs affects all pages. | |
840 | * | |
841 | * Writing 2 to /proc/pid/clear_refs only affects | |
842 | * Anonymous pages. | |
843 | * | |
844 | * Writing 3 to /proc/pid/clear_refs only affects file | |
845 | * mapped pages. | |
c86c97ff CG |
846 | * |
847 | * Writing 4 to /proc/pid/clear_refs affects all pages. | |
398499d5 MB |
848 | */ |
849 | if (type == CLEAR_REFS_ANON && vma->vm_file) | |
850 | continue; | |
851 | if (type == CLEAR_REFS_MAPPED && !vma->vm_file) | |
852 | continue; | |
c86c97ff CG |
853 | if (type == CLEAR_REFS_SOFT_DIRTY) { |
854 | if (vma->vm_flags & VM_SOFTDIRTY) | |
855 | vma->vm_flags &= ~VM_SOFTDIRTY; | |
856 | } | |
398499d5 MB |
857 | walk_page_range(vma->vm_start, vma->vm_end, |
858 | &clear_refs_walk); | |
2165009b | 859 | } |
0f8975ec PE |
860 | if (type == CLEAR_REFS_SOFT_DIRTY) |
861 | mmu_notifier_invalidate_range_end(mm, 0, -1); | |
f248dcb3 MM |
862 | flush_tlb_mm(mm); |
863 | up_read(&mm->mmap_sem); | |
864 | mmput(mm); | |
865 | } | |
866 | put_task_struct(task); | |
fb92a4b0 VL |
867 | |
868 | return count; | |
b813e931 DR |
869 | } |
870 | ||
f248dcb3 MM |
871 | const struct file_operations proc_clear_refs_operations = { |
872 | .write = clear_refs_write, | |
6038f373 | 873 | .llseek = noop_llseek, |
f248dcb3 MM |
874 | }; |
875 | ||
092b50ba NH |
876 | typedef struct { |
877 | u64 pme; | |
878 | } pagemap_entry_t; | |
879 | ||
85863e47 | 880 | struct pagemapread { |
8c829622 | 881 | int pos, len; /* units: PM_ENTRY_BYTES, not bytes */ |
092b50ba | 882 | pagemap_entry_t *buffer; |
2b0a9f01 | 883 | bool v2; |
85863e47 MM |
884 | }; |
885 | ||
5aaabe83 NH |
886 | #define PAGEMAP_WALK_SIZE (PMD_SIZE) |
887 | #define PAGEMAP_WALK_MASK (PMD_MASK) | |
888 | ||
8c829622 | 889 | #define PM_ENTRY_BYTES sizeof(pagemap_entry_t) |
f16278c6 HR |
890 | #define PM_STATUS_BITS 3 |
891 | #define PM_STATUS_OFFSET (64 - PM_STATUS_BITS) | |
892 | #define PM_STATUS_MASK (((1LL << PM_STATUS_BITS) - 1) << PM_STATUS_OFFSET) | |
893 | #define PM_STATUS(nr) (((nr) << PM_STATUS_OFFSET) & PM_STATUS_MASK) | |
894 | #define PM_PSHIFT_BITS 6 | |
895 | #define PM_PSHIFT_OFFSET (PM_STATUS_OFFSET - PM_PSHIFT_BITS) | |
896 | #define PM_PSHIFT_MASK (((1LL << PM_PSHIFT_BITS) - 1) << PM_PSHIFT_OFFSET) | |
2b0a9f01 | 897 | #define __PM_PSHIFT(x) (((u64) (x) << PM_PSHIFT_OFFSET) & PM_PSHIFT_MASK) |
f16278c6 HR |
898 | #define PM_PFRAME_MASK ((1LL << PM_PSHIFT_OFFSET) - 1) |
899 | #define PM_PFRAME(x) ((x) & PM_PFRAME_MASK) | |
2b0a9f01 PE |
900 | /* in "new" pagemap pshift bits are occupied with more status bits */ |
901 | #define PM_STATUS2(v2, x) (__PM_PSHIFT(v2 ? x : PAGE_SHIFT)) | |
f16278c6 | 902 | |
0f8975ec | 903 | #define __PM_SOFT_DIRTY (1LL) |
f16278c6 HR |
904 | #define PM_PRESENT PM_STATUS(4LL) |
905 | #define PM_SWAP PM_STATUS(2LL) | |
052fb0d6 | 906 | #define PM_FILE PM_STATUS(1LL) |
2b0a9f01 | 907 | #define PM_NOT_PRESENT(v2) PM_STATUS2(v2, 0) |
85863e47 MM |
908 | #define PM_END_OF_BUFFER 1 |
909 | ||
092b50ba NH |
910 | static inline pagemap_entry_t make_pme(u64 val) |
911 | { | |
912 | return (pagemap_entry_t) { .pme = val }; | |
913 | } | |
914 | ||
915 | static int add_to_pagemap(unsigned long addr, pagemap_entry_t *pme, | |
85863e47 MM |
916 | struct pagemapread *pm) |
917 | { | |
092b50ba | 918 | pm->buffer[pm->pos++] = *pme; |
d82ef020 | 919 | if (pm->pos >= pm->len) |
aae8679b | 920 | return PM_END_OF_BUFFER; |
85863e47 MM |
921 | return 0; |
922 | } | |
923 | ||
924 | static int pagemap_pte_hole(unsigned long start, unsigned long end, | |
2165009b | 925 | struct mm_walk *walk) |
85863e47 | 926 | { |
2165009b | 927 | struct pagemapread *pm = walk->private; |
85863e47 MM |
928 | unsigned long addr; |
929 | int err = 0; | |
2b0a9f01 | 930 | pagemap_entry_t pme = make_pme(PM_NOT_PRESENT(pm->v2)); |
092b50ba | 931 | |
85863e47 | 932 | for (addr = start; addr < end; addr += PAGE_SIZE) { |
092b50ba | 933 | err = add_to_pagemap(addr, &pme, pm); |
85863e47 MM |
934 | if (err) |
935 | break; | |
936 | } | |
937 | return err; | |
938 | } | |
939 | ||
2b0a9f01 | 940 | static void pte_to_pagemap_entry(pagemap_entry_t *pme, struct pagemapread *pm, |
052fb0d6 | 941 | struct vm_area_struct *vma, unsigned long addr, pte_t pte) |
85863e47 | 942 | { |
052fb0d6 KK |
943 | u64 frame, flags; |
944 | struct page *page = NULL; | |
0f8975ec | 945 | int flags2 = 0; |
85863e47 | 946 | |
052fb0d6 KK |
947 | if (pte_present(pte)) { |
948 | frame = pte_pfn(pte); | |
949 | flags = PM_PRESENT; | |
950 | page = vm_normal_page(vma, addr, pte); | |
e9cdd6e7 CG |
951 | if (pte_soft_dirty(pte)) |
952 | flags2 |= __PM_SOFT_DIRTY; | |
052fb0d6 | 953 | } else if (is_swap_pte(pte)) { |
179ef71c CG |
954 | swp_entry_t entry; |
955 | if (pte_swp_soft_dirty(pte)) | |
956 | flags2 |= __PM_SOFT_DIRTY; | |
957 | entry = pte_to_swp_entry(pte); | |
052fb0d6 KK |
958 | frame = swp_type(entry) | |
959 | (swp_offset(entry) << MAX_SWAPFILES_SHIFT); | |
960 | flags = PM_SWAP; | |
961 | if (is_migration_entry(entry)) | |
962 | page = migration_entry_to_page(entry); | |
963 | } else { | |
d9104d1c CG |
964 | if (vma->vm_flags & VM_SOFTDIRTY) |
965 | flags2 |= __PM_SOFT_DIRTY; | |
966 | *pme = make_pme(PM_NOT_PRESENT(pm->v2) | PM_STATUS2(pm->v2, flags2)); | |
052fb0d6 KK |
967 | return; |
968 | } | |
969 | ||
970 | if (page && !PageAnon(page)) | |
971 | flags |= PM_FILE; | |
e9cdd6e7 | 972 | if ((vma->vm_flags & VM_SOFTDIRTY)) |
0f8975ec | 973 | flags2 |= __PM_SOFT_DIRTY; |
052fb0d6 | 974 | |
0f8975ec | 975 | *pme = make_pme(PM_PFRAME(frame) | PM_STATUS2(pm->v2, flags2) | flags); |
bcf8039e DH |
976 | } |
977 | ||
5aaabe83 | 978 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
2b0a9f01 | 979 | static void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme, struct pagemapread *pm, |
0f8975ec | 980 | pmd_t pmd, int offset, int pmd_flags2) |
5aaabe83 | 981 | { |
5aaabe83 NH |
982 | /* |
983 | * Currently pmd for thp is always present because thp can not be | |
984 | * swapped-out, migrated, or HWPOISONed (split in such cases instead.) | |
985 | * This if-check is just to prepare for future implementation. | |
986 | */ | |
987 | if (pmd_present(pmd)) | |
092b50ba | 988 | *pme = make_pme(PM_PFRAME(pmd_pfn(pmd) + offset) |
0f8975ec | 989 | | PM_STATUS2(pm->v2, pmd_flags2) | PM_PRESENT); |
16fbdce6 | 990 | else |
d9104d1c | 991 | *pme = make_pme(PM_NOT_PRESENT(pm->v2) | PM_STATUS2(pm->v2, pmd_flags2)); |
5aaabe83 NH |
992 | } |
993 | #else | |
2b0a9f01 | 994 | static inline void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme, struct pagemapread *pm, |
0f8975ec | 995 | pmd_t pmd, int offset, int pmd_flags2) |
5aaabe83 | 996 | { |
5aaabe83 NH |
997 | } |
998 | #endif | |
999 | ||
85863e47 | 1000 | static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, |
2165009b | 1001 | struct mm_walk *walk) |
85863e47 | 1002 | { |
bcf8039e | 1003 | struct vm_area_struct *vma; |
2165009b | 1004 | struct pagemapread *pm = walk->private; |
bf929152 | 1005 | spinlock_t *ptl; |
85863e47 MM |
1006 | pte_t *pte; |
1007 | int err = 0; | |
2b0a9f01 | 1008 | pagemap_entry_t pme = make_pme(PM_NOT_PRESENT(pm->v2)); |
85863e47 | 1009 | |
bcf8039e DH |
1010 | /* find the first VMA at or above 'addr' */ |
1011 | vma = find_vma(walk->mm, addr); | |
bf929152 | 1012 | if (vma && pmd_trans_huge_lock(pmd, vma, &ptl) == 1) { |
0f8975ec PE |
1013 | int pmd_flags2; |
1014 | ||
d9104d1c CG |
1015 | if ((vma->vm_flags & VM_SOFTDIRTY) || pmd_soft_dirty(*pmd)) |
1016 | pmd_flags2 = __PM_SOFT_DIRTY; | |
1017 | else | |
1018 | pmd_flags2 = 0; | |
1019 | ||
025c5b24 NH |
1020 | for (; addr != end; addr += PAGE_SIZE) { |
1021 | unsigned long offset; | |
1022 | ||
1023 | offset = (addr & ~PAGEMAP_WALK_MASK) >> | |
1024 | PAGE_SHIFT; | |
0f8975ec | 1025 | thp_pmd_to_pagemap_entry(&pme, pm, *pmd, offset, pmd_flags2); |
092b50ba | 1026 | err = add_to_pagemap(addr, &pme, pm); |
025c5b24 NH |
1027 | if (err) |
1028 | break; | |
5aaabe83 | 1029 | } |
bf929152 | 1030 | spin_unlock(ptl); |
025c5b24 | 1031 | return err; |
5aaabe83 NH |
1032 | } |
1033 | ||
45f83cef AA |
1034 | if (pmd_trans_unstable(pmd)) |
1035 | return 0; | |
85863e47 | 1036 | for (; addr != end; addr += PAGE_SIZE) { |
d9104d1c | 1037 | int flags2; |
bcf8039e DH |
1038 | |
1039 | /* check to see if we've left 'vma' behind | |
1040 | * and need a new, higher one */ | |
16fbdce6 | 1041 | if (vma && (addr >= vma->vm_end)) { |
bcf8039e | 1042 | vma = find_vma(walk->mm, addr); |
d9104d1c CG |
1043 | if (vma && (vma->vm_flags & VM_SOFTDIRTY)) |
1044 | flags2 = __PM_SOFT_DIRTY; | |
1045 | else | |
1046 | flags2 = 0; | |
1047 | pme = make_pme(PM_NOT_PRESENT(pm->v2) | PM_STATUS2(pm->v2, flags2)); | |
16fbdce6 | 1048 | } |
bcf8039e DH |
1049 | |
1050 | /* check that 'vma' actually covers this address, | |
1051 | * and that it isn't a huge page vma */ | |
1052 | if (vma && (vma->vm_start <= addr) && | |
1053 | !is_vm_hugetlb_page(vma)) { | |
1054 | pte = pte_offset_map(pmd, addr); | |
2b0a9f01 | 1055 | pte_to_pagemap_entry(&pme, pm, vma, addr, *pte); |
bcf8039e DH |
1056 | /* unmap before userspace copy */ |
1057 | pte_unmap(pte); | |
1058 | } | |
092b50ba | 1059 | err = add_to_pagemap(addr, &pme, pm); |
85863e47 MM |
1060 | if (err) |
1061 | return err; | |
1062 | } | |
1063 | ||
1064 | cond_resched(); | |
1065 | ||
1066 | return err; | |
1067 | } | |
1068 | ||
1a5cb814 | 1069 | #ifdef CONFIG_HUGETLB_PAGE |
2b0a9f01 | 1070 | static void huge_pte_to_pagemap_entry(pagemap_entry_t *pme, struct pagemapread *pm, |
d9104d1c | 1071 | pte_t pte, int offset, int flags2) |
5dc37642 | 1072 | { |
5dc37642 | 1073 | if (pte_present(pte)) |
d9104d1c CG |
1074 | *pme = make_pme(PM_PFRAME(pte_pfn(pte) + offset) | |
1075 | PM_STATUS2(pm->v2, flags2) | | |
1076 | PM_PRESENT); | |
16fbdce6 | 1077 | else |
d9104d1c CG |
1078 | *pme = make_pme(PM_NOT_PRESENT(pm->v2) | |
1079 | PM_STATUS2(pm->v2, flags2)); | |
5dc37642 NH |
1080 | } |
1081 | ||
116354d1 NH |
1082 | /* This function walks within one hugetlb entry in the single call */ |
1083 | static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask, | |
1084 | unsigned long addr, unsigned long end, | |
1085 | struct mm_walk *walk) | |
5dc37642 | 1086 | { |
5dc37642 | 1087 | struct pagemapread *pm = walk->private; |
d9104d1c | 1088 | struct vm_area_struct *vma; |
5dc37642 | 1089 | int err = 0; |
d9104d1c | 1090 | int flags2; |
16fbdce6 | 1091 | pagemap_entry_t pme; |
5dc37642 | 1092 | |
d9104d1c CG |
1093 | vma = find_vma(walk->mm, addr); |
1094 | WARN_ON_ONCE(!vma); | |
1095 | ||
1096 | if (vma && (vma->vm_flags & VM_SOFTDIRTY)) | |
1097 | flags2 = __PM_SOFT_DIRTY; | |
1098 | else | |
1099 | flags2 = 0; | |
1100 | ||
5dc37642 | 1101 | for (; addr != end; addr += PAGE_SIZE) { |
116354d1 | 1102 | int offset = (addr & ~hmask) >> PAGE_SHIFT; |
d9104d1c | 1103 | huge_pte_to_pagemap_entry(&pme, pm, *pte, offset, flags2); |
092b50ba | 1104 | err = add_to_pagemap(addr, &pme, pm); |
5dc37642 NH |
1105 | if (err) |
1106 | return err; | |
1107 | } | |
1108 | ||
1109 | cond_resched(); | |
1110 | ||
1111 | return err; | |
1112 | } | |
1a5cb814 | 1113 | #endif /* HUGETLB_PAGE */ |
5dc37642 | 1114 | |
85863e47 MM |
1115 | /* |
1116 | * /proc/pid/pagemap - an array mapping virtual pages to pfns | |
1117 | * | |
f16278c6 HR |
1118 | * For each page in the address space, this file contains one 64-bit entry |
1119 | * consisting of the following: | |
1120 | * | |
052fb0d6 | 1121 | * Bits 0-54 page frame number (PFN) if present |
f16278c6 | 1122 | * Bits 0-4 swap type if swapped |
052fb0d6 | 1123 | * Bits 5-54 swap offset if swapped |
f16278c6 | 1124 | * Bits 55-60 page shift (page size = 1<<page shift) |
052fb0d6 | 1125 | * Bit 61 page is file-page or shared-anon |
f16278c6 HR |
1126 | * Bit 62 page swapped |
1127 | * Bit 63 page present | |
1128 | * | |
1129 | * If the page is not present but in swap, then the PFN contains an | |
1130 | * encoding of the swap file number and the page's offset into the | |
1131 | * swap. Unmapped pages return a null PFN. This allows determining | |
85863e47 MM |
1132 | * precisely which pages are mapped (or in swap) and comparing mapped |
1133 | * pages between processes. | |
1134 | * | |
1135 | * Efficient users of this interface will use /proc/pid/maps to | |
1136 | * determine which areas of memory are actually mapped and llseek to | |
1137 | * skip over unmapped regions. | |
1138 | */ | |
1139 | static ssize_t pagemap_read(struct file *file, char __user *buf, | |
1140 | size_t count, loff_t *ppos) | |
1141 | { | |
496ad9aa | 1142 | struct task_struct *task = get_proc_task(file_inode(file)); |
85863e47 MM |
1143 | struct mm_struct *mm; |
1144 | struct pagemapread pm; | |
85863e47 | 1145 | int ret = -ESRCH; |
ee1e6ab6 | 1146 | struct mm_walk pagemap_walk = {}; |
5d7e0d2b AM |
1147 | unsigned long src; |
1148 | unsigned long svpfn; | |
1149 | unsigned long start_vaddr; | |
1150 | unsigned long end_vaddr; | |
d82ef020 | 1151 | int copied = 0; |
85863e47 MM |
1152 | |
1153 | if (!task) | |
1154 | goto out; | |
1155 | ||
85863e47 MM |
1156 | ret = -EINVAL; |
1157 | /* file position must be aligned */ | |
aae8679b | 1158 | if ((*ppos % PM_ENTRY_BYTES) || (count % PM_ENTRY_BYTES)) |
fb39380b | 1159 | goto out_task; |
85863e47 MM |
1160 | |
1161 | ret = 0; | |
08161786 VM |
1162 | if (!count) |
1163 | goto out_task; | |
1164 | ||
541c237c | 1165 | pm.v2 = soft_dirty_cleared; |
8c829622 | 1166 | pm.len = (PAGEMAP_WALK_SIZE >> PAGE_SHIFT); |
1167 | pm.buffer = kmalloc(pm.len * PM_ENTRY_BYTES, GFP_TEMPORARY); | |
5d7e0d2b | 1168 | ret = -ENOMEM; |
d82ef020 | 1169 | if (!pm.buffer) |
98bc93e5 KM |
1170 | goto out_task; |
1171 | ||
e7dcd999 | 1172 | mm = mm_access(task, PTRACE_MODE_READ); |
98bc93e5 KM |
1173 | ret = PTR_ERR(mm); |
1174 | if (!mm || IS_ERR(mm)) | |
1175 | goto out_free; | |
85863e47 | 1176 | |
5d7e0d2b AM |
1177 | pagemap_walk.pmd_entry = pagemap_pte_range; |
1178 | pagemap_walk.pte_hole = pagemap_pte_hole; | |
1a5cb814 | 1179 | #ifdef CONFIG_HUGETLB_PAGE |
5dc37642 | 1180 | pagemap_walk.hugetlb_entry = pagemap_hugetlb_range; |
1a5cb814 | 1181 | #endif |
5d7e0d2b AM |
1182 | pagemap_walk.mm = mm; |
1183 | pagemap_walk.private = ± | |
1184 | ||
1185 | src = *ppos; | |
1186 | svpfn = src / PM_ENTRY_BYTES; | |
1187 | start_vaddr = svpfn << PAGE_SHIFT; | |
1188 | end_vaddr = TASK_SIZE_OF(task); | |
1189 | ||
1190 | /* watch out for wraparound */ | |
1191 | if (svpfn > TASK_SIZE_OF(task) >> PAGE_SHIFT) | |
1192 | start_vaddr = end_vaddr; | |
1193 | ||
1194 | /* | |
1195 | * The odds are that this will stop walking way | |
1196 | * before end_vaddr, because the length of the | |
1197 | * user buffer is tracked in "pm", and the walk | |
1198 | * will stop when we hit the end of the buffer. | |
1199 | */ | |
d82ef020 KH |
1200 | ret = 0; |
1201 | while (count && (start_vaddr < end_vaddr)) { | |
1202 | int len; | |
1203 | unsigned long end; | |
1204 | ||
1205 | pm.pos = 0; | |
ea251c1d | 1206 | end = (start_vaddr + PAGEMAP_WALK_SIZE) & PAGEMAP_WALK_MASK; |
d82ef020 KH |
1207 | /* overflow ? */ |
1208 | if (end < start_vaddr || end > end_vaddr) | |
1209 | end = end_vaddr; | |
1210 | down_read(&mm->mmap_sem); | |
1211 | ret = walk_page_range(start_vaddr, end, &pagemap_walk); | |
1212 | up_read(&mm->mmap_sem); | |
1213 | start_vaddr = end; | |
1214 | ||
1215 | len = min(count, PM_ENTRY_BYTES * pm.pos); | |
309361e0 | 1216 | if (copy_to_user(buf, pm.buffer, len)) { |
d82ef020 | 1217 | ret = -EFAULT; |
98bc93e5 | 1218 | goto out_mm; |
d82ef020 KH |
1219 | } |
1220 | copied += len; | |
1221 | buf += len; | |
1222 | count -= len; | |
85863e47 | 1223 | } |
d82ef020 KH |
1224 | *ppos += copied; |
1225 | if (!ret || ret == PM_END_OF_BUFFER) | |
1226 | ret = copied; | |
1227 | ||
fb39380b MT |
1228 | out_mm: |
1229 | mmput(mm); | |
98bc93e5 KM |
1230 | out_free: |
1231 | kfree(pm.buffer); | |
85863e47 MM |
1232 | out_task: |
1233 | put_task_struct(task); | |
1234 | out: | |
1235 | return ret; | |
1236 | } | |
1237 | ||
541c237c PE |
1238 | static int pagemap_open(struct inode *inode, struct file *file) |
1239 | { | |
1240 | pr_warn_once("Bits 55-60 of /proc/PID/pagemap entries are about " | |
1241 | "to stop being page-shift some time soon. See the " | |
1242 | "linux/Documentation/vm/pagemap.txt for details.\n"); | |
1243 | return 0; | |
1244 | } | |
1245 | ||
85863e47 MM |
1246 | const struct file_operations proc_pagemap_operations = { |
1247 | .llseek = mem_lseek, /* borrow this */ | |
1248 | .read = pagemap_read, | |
541c237c | 1249 | .open = pagemap_open, |
85863e47 | 1250 | }; |
1e883281 | 1251 | #endif /* CONFIG_PROC_PAGE_MONITOR */ |
85863e47 | 1252 | |
6e21c8f1 | 1253 | #ifdef CONFIG_NUMA |
6e21c8f1 | 1254 | |
f69ff943 SW |
1255 | struct numa_maps { |
1256 | struct vm_area_struct *vma; | |
1257 | unsigned long pages; | |
1258 | unsigned long anon; | |
1259 | unsigned long active; | |
1260 | unsigned long writeback; | |
1261 | unsigned long mapcount_max; | |
1262 | unsigned long dirty; | |
1263 | unsigned long swapcache; | |
1264 | unsigned long node[MAX_NUMNODES]; | |
1265 | }; | |
1266 | ||
5b52fc89 SW |
1267 | struct numa_maps_private { |
1268 | struct proc_maps_private proc_maps; | |
1269 | struct numa_maps md; | |
1270 | }; | |
1271 | ||
eb4866d0 DH |
1272 | static void gather_stats(struct page *page, struct numa_maps *md, int pte_dirty, |
1273 | unsigned long nr_pages) | |
f69ff943 SW |
1274 | { |
1275 | int count = page_mapcount(page); | |
1276 | ||
eb4866d0 | 1277 | md->pages += nr_pages; |
f69ff943 | 1278 | if (pte_dirty || PageDirty(page)) |
eb4866d0 | 1279 | md->dirty += nr_pages; |
f69ff943 SW |
1280 | |
1281 | if (PageSwapCache(page)) | |
eb4866d0 | 1282 | md->swapcache += nr_pages; |
f69ff943 SW |
1283 | |
1284 | if (PageActive(page) || PageUnevictable(page)) | |
eb4866d0 | 1285 | md->active += nr_pages; |
f69ff943 SW |
1286 | |
1287 | if (PageWriteback(page)) | |
eb4866d0 | 1288 | md->writeback += nr_pages; |
f69ff943 SW |
1289 | |
1290 | if (PageAnon(page)) | |
eb4866d0 | 1291 | md->anon += nr_pages; |
f69ff943 SW |
1292 | |
1293 | if (count > md->mapcount_max) | |
1294 | md->mapcount_max = count; | |
1295 | ||
eb4866d0 | 1296 | md->node[page_to_nid(page)] += nr_pages; |
f69ff943 SW |
1297 | } |
1298 | ||
3200a8aa DH |
1299 | static struct page *can_gather_numa_stats(pte_t pte, struct vm_area_struct *vma, |
1300 | unsigned long addr) | |
1301 | { | |
1302 | struct page *page; | |
1303 | int nid; | |
1304 | ||
1305 | if (!pte_present(pte)) | |
1306 | return NULL; | |
1307 | ||
1308 | page = vm_normal_page(vma, addr, pte); | |
1309 | if (!page) | |
1310 | return NULL; | |
1311 | ||
1312 | if (PageReserved(page)) | |
1313 | return NULL; | |
1314 | ||
1315 | nid = page_to_nid(page); | |
4ff1b2c2 | 1316 | if (!node_isset(nid, node_states[N_MEMORY])) |
3200a8aa DH |
1317 | return NULL; |
1318 | ||
1319 | return page; | |
1320 | } | |
1321 | ||
f69ff943 SW |
1322 | static int gather_pte_stats(pmd_t *pmd, unsigned long addr, |
1323 | unsigned long end, struct mm_walk *walk) | |
1324 | { | |
1325 | struct numa_maps *md; | |
1326 | spinlock_t *ptl; | |
1327 | pte_t *orig_pte; | |
1328 | pte_t *pte; | |
1329 | ||
1330 | md = walk->private; | |
025c5b24 | 1331 | |
bf929152 | 1332 | if (pmd_trans_huge_lock(pmd, md->vma, &ptl) == 1) { |
025c5b24 NH |
1333 | pte_t huge_pte = *(pte_t *)pmd; |
1334 | struct page *page; | |
1335 | ||
1336 | page = can_gather_numa_stats(huge_pte, md->vma, addr); | |
1337 | if (page) | |
1338 | gather_stats(page, md, pte_dirty(huge_pte), | |
1339 | HPAGE_PMD_SIZE/PAGE_SIZE); | |
bf929152 | 1340 | spin_unlock(ptl); |
025c5b24 | 1341 | return 0; |
32ef4384 DH |
1342 | } |
1343 | ||
1a5a9906 AA |
1344 | if (pmd_trans_unstable(pmd)) |
1345 | return 0; | |
f69ff943 SW |
1346 | orig_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl); |
1347 | do { | |
3200a8aa | 1348 | struct page *page = can_gather_numa_stats(*pte, md->vma, addr); |
f69ff943 SW |
1349 | if (!page) |
1350 | continue; | |
eb4866d0 | 1351 | gather_stats(page, md, pte_dirty(*pte), 1); |
f69ff943 SW |
1352 | |
1353 | } while (pte++, addr += PAGE_SIZE, addr != end); | |
1354 | pte_unmap_unlock(orig_pte, ptl); | |
1355 | return 0; | |
1356 | } | |
1357 | #ifdef CONFIG_HUGETLB_PAGE | |
1358 | static int gather_hugetbl_stats(pte_t *pte, unsigned long hmask, | |
1359 | unsigned long addr, unsigned long end, struct mm_walk *walk) | |
1360 | { | |
1361 | struct numa_maps *md; | |
1362 | struct page *page; | |
1363 | ||
1364 | if (pte_none(*pte)) | |
1365 | return 0; | |
1366 | ||
1367 | page = pte_page(*pte); | |
1368 | if (!page) | |
1369 | return 0; | |
1370 | ||
1371 | md = walk->private; | |
eb4866d0 | 1372 | gather_stats(page, md, pte_dirty(*pte), 1); |
f69ff943 SW |
1373 | return 0; |
1374 | } | |
1375 | ||
1376 | #else | |
1377 | static int gather_hugetbl_stats(pte_t *pte, unsigned long hmask, | |
1378 | unsigned long addr, unsigned long end, struct mm_walk *walk) | |
1379 | { | |
1380 | return 0; | |
1381 | } | |
1382 | #endif | |
1383 | ||
1384 | /* | |
1385 | * Display pages allocated per node and memory policy via /proc. | |
1386 | */ | |
b7643757 | 1387 | static int show_numa_map(struct seq_file *m, void *v, int is_pid) |
f69ff943 | 1388 | { |
5b52fc89 SW |
1389 | struct numa_maps_private *numa_priv = m->private; |
1390 | struct proc_maps_private *proc_priv = &numa_priv->proc_maps; | |
f69ff943 | 1391 | struct vm_area_struct *vma = v; |
5b52fc89 | 1392 | struct numa_maps *md = &numa_priv->md; |
f69ff943 | 1393 | struct file *file = vma->vm_file; |
32f8516a | 1394 | struct task_struct *task = proc_priv->task; |
f69ff943 SW |
1395 | struct mm_struct *mm = vma->vm_mm; |
1396 | struct mm_walk walk = {}; | |
1397 | struct mempolicy *pol; | |
948927ee DR |
1398 | char buffer[64]; |
1399 | int nid; | |
f69ff943 SW |
1400 | |
1401 | if (!mm) | |
1402 | return 0; | |
1403 | ||
5b52fc89 SW |
1404 | /* Ensure we start with an empty set of numa_maps statistics. */ |
1405 | memset(md, 0, sizeof(*md)); | |
f69ff943 SW |
1406 | |
1407 | md->vma = vma; | |
1408 | ||
1409 | walk.hugetlb_entry = gather_hugetbl_stats; | |
1410 | walk.pmd_entry = gather_pte_stats; | |
1411 | walk.private = md; | |
1412 | walk.mm = mm; | |
1413 | ||
32f8516a | 1414 | pol = get_vma_policy(task, vma, vma->vm_start); |
948927ee | 1415 | mpol_to_str(buffer, sizeof(buffer), pol); |
f69ff943 SW |
1416 | mpol_cond_put(pol); |
1417 | ||
1418 | seq_printf(m, "%08lx %s", vma->vm_start, buffer); | |
1419 | ||
1420 | if (file) { | |
1421 | seq_printf(m, " file="); | |
1422 | seq_path(m, &file->f_path, "\n\t= "); | |
1423 | } else if (vma->vm_start <= mm->brk && vma->vm_end >= mm->start_brk) { | |
1424 | seq_printf(m, " heap"); | |
b7643757 | 1425 | } else { |
32f8516a | 1426 | pid_t tid = vm_is_stack(task, vma, is_pid); |
b7643757 SP |
1427 | if (tid != 0) { |
1428 | /* | |
1429 | * Thread stack in /proc/PID/task/TID/maps or | |
1430 | * the main process stack. | |
1431 | */ | |
1432 | if (!is_pid || (vma->vm_start <= mm->start_stack && | |
1433 | vma->vm_end >= mm->start_stack)) | |
1434 | seq_printf(m, " stack"); | |
1435 | else | |
1436 | seq_printf(m, " stack:%d", tid); | |
1437 | } | |
f69ff943 SW |
1438 | } |
1439 | ||
fc360bd9 AM |
1440 | if (is_vm_hugetlb_page(vma)) |
1441 | seq_printf(m, " huge"); | |
1442 | ||
f69ff943 SW |
1443 | walk_page_range(vma->vm_start, vma->vm_end, &walk); |
1444 | ||
1445 | if (!md->pages) | |
1446 | goto out; | |
1447 | ||
1448 | if (md->anon) | |
1449 | seq_printf(m, " anon=%lu", md->anon); | |
1450 | ||
1451 | if (md->dirty) | |
1452 | seq_printf(m, " dirty=%lu", md->dirty); | |
1453 | ||
1454 | if (md->pages != md->anon && md->pages != md->dirty) | |
1455 | seq_printf(m, " mapped=%lu", md->pages); | |
1456 | ||
1457 | if (md->mapcount_max > 1) | |
1458 | seq_printf(m, " mapmax=%lu", md->mapcount_max); | |
1459 | ||
1460 | if (md->swapcache) | |
1461 | seq_printf(m, " swapcache=%lu", md->swapcache); | |
1462 | ||
1463 | if (md->active < md->pages && !is_vm_hugetlb_page(vma)) | |
1464 | seq_printf(m, " active=%lu", md->active); | |
1465 | ||
1466 | if (md->writeback) | |
1467 | seq_printf(m, " writeback=%lu", md->writeback); | |
1468 | ||
948927ee DR |
1469 | for_each_node_state(nid, N_MEMORY) |
1470 | if (md->node[nid]) | |
1471 | seq_printf(m, " N%d=%lu", nid, md->node[nid]); | |
f69ff943 SW |
1472 | out: |
1473 | seq_putc(m, '\n'); | |
f69ff943 SW |
1474 | |
1475 | if (m->count < m->size) | |
5b52fc89 | 1476 | m->version = (vma != proc_priv->tail_vma) ? vma->vm_start : 0; |
f69ff943 SW |
1477 | return 0; |
1478 | } | |
5b52fc89 | 1479 | |
b7643757 SP |
1480 | static int show_pid_numa_map(struct seq_file *m, void *v) |
1481 | { | |
1482 | return show_numa_map(m, v, 1); | |
1483 | } | |
1484 | ||
1485 | static int show_tid_numa_map(struct seq_file *m, void *v) | |
1486 | { | |
1487 | return show_numa_map(m, v, 0); | |
1488 | } | |
1489 | ||
03a44825 | 1490 | static const struct seq_operations proc_pid_numa_maps_op = { |
b7643757 SP |
1491 | .start = m_start, |
1492 | .next = m_next, | |
1493 | .stop = m_stop, | |
1494 | .show = show_pid_numa_map, | |
6e21c8f1 | 1495 | }; |
662795de | 1496 | |
b7643757 SP |
1497 | static const struct seq_operations proc_tid_numa_maps_op = { |
1498 | .start = m_start, | |
1499 | .next = m_next, | |
1500 | .stop = m_stop, | |
1501 | .show = show_tid_numa_map, | |
1502 | }; | |
1503 | ||
1504 | static int numa_maps_open(struct inode *inode, struct file *file, | |
1505 | const struct seq_operations *ops) | |
662795de | 1506 | { |
5b52fc89 SW |
1507 | struct numa_maps_private *priv; |
1508 | int ret = -ENOMEM; | |
1509 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
1510 | if (priv) { | |
1511 | priv->proc_maps.pid = proc_pid(inode); | |
b7643757 | 1512 | ret = seq_open(file, ops); |
5b52fc89 SW |
1513 | if (!ret) { |
1514 | struct seq_file *m = file->private_data; | |
1515 | m->private = priv; | |
1516 | } else { | |
1517 | kfree(priv); | |
1518 | } | |
1519 | } | |
1520 | return ret; | |
662795de EB |
1521 | } |
1522 | ||
b7643757 SP |
1523 | static int pid_numa_maps_open(struct inode *inode, struct file *file) |
1524 | { | |
1525 | return numa_maps_open(inode, file, &proc_pid_numa_maps_op); | |
1526 | } | |
1527 | ||
1528 | static int tid_numa_maps_open(struct inode *inode, struct file *file) | |
1529 | { | |
1530 | return numa_maps_open(inode, file, &proc_tid_numa_maps_op); | |
1531 | } | |
1532 | ||
1533 | const struct file_operations proc_pid_numa_maps_operations = { | |
1534 | .open = pid_numa_maps_open, | |
1535 | .read = seq_read, | |
1536 | .llseek = seq_lseek, | |
1537 | .release = seq_release_private, | |
1538 | }; | |
1539 | ||
1540 | const struct file_operations proc_tid_numa_maps_operations = { | |
1541 | .open = tid_numa_maps_open, | |
662795de EB |
1542 | .read = seq_read, |
1543 | .llseek = seq_lseek, | |
99f89551 | 1544 | .release = seq_release_private, |
662795de | 1545 | }; |
f69ff943 | 1546 | #endif /* CONFIG_NUMA */ |