Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/mm.h> |
2 | #include <linux/hugetlb.h> | |
22e057c5 | 3 | #include <linux/huge_mm.h> |
1da177e4 LT |
4 | #include <linux/mount.h> |
5 | #include <linux/seq_file.h> | |
e070ad49 | 6 | #include <linux/highmem.h> |
5096add8 | 7 | #include <linux/ptrace.h> |
5a0e3ad6 | 8 | #include <linux/slab.h> |
6e21c8f1 CL |
9 | #include <linux/pagemap.h> |
10 | #include <linux/mempolicy.h> | |
22e057c5 | 11 | #include <linux/rmap.h> |
85863e47 MM |
12 | #include <linux/swap.h> |
13 | #include <linux/swapops.h> | |
e070ad49 | 14 | |
1da177e4 LT |
15 | #include <asm/elf.h> |
16 | #include <asm/uaccess.h> | |
e070ad49 | 17 | #include <asm/tlbflush.h> |
1da177e4 LT |
18 | #include "internal.h" |
19 | ||
df5f8314 | 20 | void task_mem(struct seq_file *m, struct mm_struct *mm) |
1da177e4 | 21 | { |
b084d435 | 22 | unsigned long data, text, lib, swap; |
365e9c87 HD |
23 | unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss; |
24 | ||
25 | /* | |
26 | * Note: to minimize their overhead, mm maintains hiwater_vm and | |
27 | * hiwater_rss only when about to *lower* total_vm or rss. Any | |
28 | * collector of these hiwater stats must therefore get total_vm | |
29 | * and rss too, which will usually be the higher. Barriers? not | |
30 | * worth the effort, such snapshots can always be inconsistent. | |
31 | */ | |
32 | hiwater_vm = total_vm = mm->total_vm; | |
33 | if (hiwater_vm < mm->hiwater_vm) | |
34 | hiwater_vm = mm->hiwater_vm; | |
35 | hiwater_rss = total_rss = get_mm_rss(mm); | |
36 | if (hiwater_rss < mm->hiwater_rss) | |
37 | hiwater_rss = mm->hiwater_rss; | |
1da177e4 LT |
38 | |
39 | data = mm->total_vm - mm->shared_vm - mm->stack_vm; | |
40 | text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10; | |
41 | lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text; | |
b084d435 | 42 | swap = get_mm_counter(mm, MM_SWAPENTS); |
df5f8314 | 43 | seq_printf(m, |
365e9c87 | 44 | "VmPeak:\t%8lu kB\n" |
1da177e4 LT |
45 | "VmSize:\t%8lu kB\n" |
46 | "VmLck:\t%8lu kB\n" | |
bc3e53f6 | 47 | "VmPin:\t%8lu kB\n" |
365e9c87 | 48 | "VmHWM:\t%8lu kB\n" |
1da177e4 LT |
49 | "VmRSS:\t%8lu kB\n" |
50 | "VmData:\t%8lu kB\n" | |
51 | "VmStk:\t%8lu kB\n" | |
52 | "VmExe:\t%8lu kB\n" | |
53 | "VmLib:\t%8lu kB\n" | |
b084d435 KH |
54 | "VmPTE:\t%8lu kB\n" |
55 | "VmSwap:\t%8lu kB\n", | |
365e9c87 HD |
56 | hiwater_vm << (PAGE_SHIFT-10), |
57 | (total_vm - mm->reserved_vm) << (PAGE_SHIFT-10), | |
1da177e4 | 58 | mm->locked_vm << (PAGE_SHIFT-10), |
bc3e53f6 | 59 | mm->pinned_vm << (PAGE_SHIFT-10), |
365e9c87 HD |
60 | hiwater_rss << (PAGE_SHIFT-10), |
61 | total_rss << (PAGE_SHIFT-10), | |
1da177e4 LT |
62 | data << (PAGE_SHIFT-10), |
63 | mm->stack_vm << (PAGE_SHIFT-10), text, lib, | |
b084d435 KH |
64 | (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10, |
65 | swap << (PAGE_SHIFT-10)); | |
1da177e4 LT |
66 | } |
67 | ||
68 | unsigned long task_vsize(struct mm_struct *mm) | |
69 | { | |
70 | return PAGE_SIZE * mm->total_vm; | |
71 | } | |
72 | ||
a2ade7b6 AD |
73 | unsigned long task_statm(struct mm_struct *mm, |
74 | unsigned long *shared, unsigned long *text, | |
75 | unsigned long *data, unsigned long *resident) | |
1da177e4 | 76 | { |
d559db08 | 77 | *shared = get_mm_counter(mm, MM_FILEPAGES); |
1da177e4 LT |
78 | *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) |
79 | >> PAGE_SHIFT; | |
80 | *data = mm->total_vm - mm->shared_vm; | |
d559db08 | 81 | *resident = *shared + get_mm_counter(mm, MM_ANONPAGES); |
1da177e4 LT |
82 | return mm->total_vm; |
83 | } | |
84 | ||
1da177e4 LT |
85 | static void pad_len_spaces(struct seq_file *m, int len) |
86 | { | |
87 | len = 25 + sizeof(void*) * 6 - len; | |
88 | if (len < 1) | |
89 | len = 1; | |
90 | seq_printf(m, "%*c", len, ' '); | |
91 | } | |
92 | ||
a6198797 MM |
93 | static void vma_stop(struct proc_maps_private *priv, struct vm_area_struct *vma) |
94 | { | |
95 | if (vma && vma != priv->tail_vma) { | |
96 | struct mm_struct *mm = vma->vm_mm; | |
97 | up_read(&mm->mmap_sem); | |
98 | mmput(mm); | |
99 | } | |
100 | } | |
ec4dd3eb | 101 | |
a6198797 | 102 | static void *m_start(struct seq_file *m, loff_t *pos) |
e070ad49 | 103 | { |
a6198797 MM |
104 | struct proc_maps_private *priv = m->private; |
105 | unsigned long last_addr = m->version; | |
106 | struct mm_struct *mm; | |
107 | struct vm_area_struct *vma, *tail_vma = NULL; | |
108 | loff_t l = *pos; | |
109 | ||
110 | /* Clear the per syscall fields in priv */ | |
111 | priv->task = NULL; | |
112 | priv->tail_vma = NULL; | |
113 | ||
114 | /* | |
115 | * We remember last_addr rather than next_addr to hit with | |
116 | * mmap_cache most of the time. We have zero last_addr at | |
117 | * the beginning and also after lseek. We will have -1 last_addr | |
118 | * after the end of the vmas. | |
119 | */ | |
120 | ||
121 | if (last_addr == -1UL) | |
122 | return NULL; | |
123 | ||
124 | priv->task = get_pid_task(priv->pid, PIDTYPE_PID); | |
125 | if (!priv->task) | |
ec6fd8a4 | 126 | return ERR_PTR(-ESRCH); |
a6198797 MM |
127 | |
128 | mm = mm_for_maps(priv->task); | |
ec6fd8a4 AV |
129 | if (!mm || IS_ERR(mm)) |
130 | return mm; | |
00f89d21 | 131 | down_read(&mm->mmap_sem); |
a6198797 | 132 | |
31db58b3 | 133 | tail_vma = get_gate_vma(priv->task->mm); |
a6198797 MM |
134 | priv->tail_vma = tail_vma; |
135 | ||
136 | /* Start with last addr hint */ | |
137 | vma = find_vma(mm, last_addr); | |
138 | if (last_addr && vma) { | |
139 | vma = vma->vm_next; | |
140 | goto out; | |
141 | } | |
142 | ||
143 | /* | |
144 | * Check the vma index is within the range and do | |
145 | * sequential scan until m_index. | |
146 | */ | |
147 | vma = NULL; | |
148 | if ((unsigned long)l < mm->map_count) { | |
149 | vma = mm->mmap; | |
150 | while (l-- && vma) | |
151 | vma = vma->vm_next; | |
152 | goto out; | |
153 | } | |
154 | ||
155 | if (l != mm->map_count) | |
156 | tail_vma = NULL; /* After gate vma */ | |
157 | ||
158 | out: | |
159 | if (vma) | |
160 | return vma; | |
161 | ||
162 | /* End of vmas has been reached */ | |
163 | m->version = (tail_vma != NULL)? 0: -1UL; | |
164 | up_read(&mm->mmap_sem); | |
165 | mmput(mm); | |
166 | return tail_vma; | |
167 | } | |
168 | ||
169 | static void *m_next(struct seq_file *m, void *v, loff_t *pos) | |
170 | { | |
171 | struct proc_maps_private *priv = m->private; | |
172 | struct vm_area_struct *vma = v; | |
173 | struct vm_area_struct *tail_vma = priv->tail_vma; | |
174 | ||
175 | (*pos)++; | |
176 | if (vma && (vma != tail_vma) && vma->vm_next) | |
177 | return vma->vm_next; | |
178 | vma_stop(priv, vma); | |
179 | return (vma != tail_vma)? tail_vma: NULL; | |
180 | } | |
181 | ||
182 | static void m_stop(struct seq_file *m, void *v) | |
183 | { | |
184 | struct proc_maps_private *priv = m->private; | |
185 | struct vm_area_struct *vma = v; | |
186 | ||
76597cd3 LT |
187 | if (!IS_ERR(vma)) |
188 | vma_stop(priv, vma); | |
a6198797 MM |
189 | if (priv->task) |
190 | put_task_struct(priv->task); | |
191 | } | |
192 | ||
193 | static int do_maps_open(struct inode *inode, struct file *file, | |
03a44825 | 194 | const struct seq_operations *ops) |
a6198797 MM |
195 | { |
196 | struct proc_maps_private *priv; | |
197 | int ret = -ENOMEM; | |
198 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
199 | if (priv) { | |
200 | priv->pid = proc_pid(inode); | |
201 | ret = seq_open(file, ops); | |
202 | if (!ret) { | |
203 | struct seq_file *m = file->private_data; | |
204 | m->private = priv; | |
205 | } else { | |
206 | kfree(priv); | |
207 | } | |
208 | } | |
209 | return ret; | |
210 | } | |
e070ad49 | 211 | |
7c88db0c | 212 | static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma) |
1da177e4 | 213 | { |
e070ad49 ML |
214 | struct mm_struct *mm = vma->vm_mm; |
215 | struct file *file = vma->vm_file; | |
ca16d140 | 216 | vm_flags_t flags = vma->vm_flags; |
1da177e4 | 217 | unsigned long ino = 0; |
6260a4b0 | 218 | unsigned long long pgoff = 0; |
a09a79f6 | 219 | unsigned long start, end; |
1da177e4 LT |
220 | dev_t dev = 0; |
221 | int len; | |
222 | ||
223 | if (file) { | |
2fddfeef | 224 | struct inode *inode = vma->vm_file->f_path.dentry->d_inode; |
1da177e4 LT |
225 | dev = inode->i_sb->s_dev; |
226 | ino = inode->i_ino; | |
6260a4b0 | 227 | pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT; |
1da177e4 LT |
228 | } |
229 | ||
d7824370 LT |
230 | /* We don't show the stack guard page in /proc/maps */ |
231 | start = vma->vm_start; | |
a09a79f6 MP |
232 | if (stack_guard_page_start(vma, start)) |
233 | start += PAGE_SIZE; | |
234 | end = vma->vm_end; | |
235 | if (stack_guard_page_end(vma, end)) | |
236 | end -= PAGE_SIZE; | |
d7824370 | 237 | |
1804dc6e | 238 | seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n", |
d7824370 | 239 | start, |
a09a79f6 | 240 | end, |
1da177e4 LT |
241 | flags & VM_READ ? 'r' : '-', |
242 | flags & VM_WRITE ? 'w' : '-', | |
243 | flags & VM_EXEC ? 'x' : '-', | |
244 | flags & VM_MAYSHARE ? 's' : 'p', | |
6260a4b0 | 245 | pgoff, |
1da177e4 LT |
246 | MAJOR(dev), MINOR(dev), ino, &len); |
247 | ||
248 | /* | |
249 | * Print the dentry name for named mappings, and a | |
250 | * special [heap] marker for the heap: | |
251 | */ | |
e070ad49 | 252 | if (file) { |
1da177e4 | 253 | pad_len_spaces(m, len); |
c32c2f63 | 254 | seq_path(m, &file->f_path, "\n"); |
1da177e4 | 255 | } else { |
e6e5494c IM |
256 | const char *name = arch_vma_name(vma); |
257 | if (!name) { | |
258 | if (mm) { | |
0db0c01b AK |
259 | if (vma->vm_start <= mm->brk && |
260 | vma->vm_end >= mm->start_brk) { | |
e6e5494c IM |
261 | name = "[heap]"; |
262 | } else if (vma->vm_start <= mm->start_stack && | |
263 | vma->vm_end >= mm->start_stack) { | |
264 | name = "[stack]"; | |
1da177e4 | 265 | } |
e6e5494c IM |
266 | } else { |
267 | name = "[vdso]"; | |
1da177e4 | 268 | } |
e6e5494c IM |
269 | } |
270 | if (name) { | |
1da177e4 | 271 | pad_len_spaces(m, len); |
e6e5494c | 272 | seq_puts(m, name); |
1da177e4 LT |
273 | } |
274 | } | |
275 | seq_putc(m, '\n'); | |
7c88db0c JK |
276 | } |
277 | ||
278 | static int show_map(struct seq_file *m, void *v) | |
279 | { | |
280 | struct vm_area_struct *vma = v; | |
281 | struct proc_maps_private *priv = m->private; | |
282 | struct task_struct *task = priv->task; | |
283 | ||
284 | show_map_vma(m, vma); | |
e070ad49 | 285 | |
e070ad49 | 286 | if (m->count < m->size) /* vma is copied successfully */ |
31db58b3 SW |
287 | m->version = (vma != get_gate_vma(task->mm)) |
288 | ? vma->vm_start : 0; | |
1da177e4 LT |
289 | return 0; |
290 | } | |
291 | ||
03a44825 | 292 | static const struct seq_operations proc_pid_maps_op = { |
a6198797 MM |
293 | .start = m_start, |
294 | .next = m_next, | |
295 | .stop = m_stop, | |
296 | .show = show_map | |
297 | }; | |
298 | ||
299 | static int maps_open(struct inode *inode, struct file *file) | |
300 | { | |
301 | return do_maps_open(inode, file, &proc_pid_maps_op); | |
302 | } | |
303 | ||
304 | const struct file_operations proc_maps_operations = { | |
305 | .open = maps_open, | |
306 | .read = seq_read, | |
307 | .llseek = seq_lseek, | |
308 | .release = seq_release_private, | |
309 | }; | |
310 | ||
311 | /* | |
312 | * Proportional Set Size(PSS): my share of RSS. | |
313 | * | |
314 | * PSS of a process is the count of pages it has in memory, where each | |
315 | * page is divided by the number of processes sharing it. So if a | |
316 | * process has 1000 pages all to itself, and 1000 shared with one other | |
317 | * process, its PSS will be 1500. | |
318 | * | |
319 | * To keep (accumulated) division errors low, we adopt a 64bit | |
320 | * fixed-point pss counter to minimize division errors. So (pss >> | |
321 | * PSS_SHIFT) would be the real byte count. | |
322 | * | |
323 | * A shift of 12 before division means (assuming 4K page size): | |
324 | * - 1M 3-user-pages add up to 8KB errors; | |
325 | * - supports mapcount up to 2^24, or 16M; | |
326 | * - supports PSS up to 2^52 bytes, or 4PB. | |
327 | */ | |
328 | #define PSS_SHIFT 12 | |
329 | ||
1e883281 | 330 | #ifdef CONFIG_PROC_PAGE_MONITOR |
214e471f | 331 | struct mem_size_stats { |
a6198797 MM |
332 | struct vm_area_struct *vma; |
333 | unsigned long resident; | |
334 | unsigned long shared_clean; | |
335 | unsigned long shared_dirty; | |
336 | unsigned long private_clean; | |
337 | unsigned long private_dirty; | |
338 | unsigned long referenced; | |
b40d4f84 | 339 | unsigned long anonymous; |
4031a219 | 340 | unsigned long anonymous_thp; |
214e471f | 341 | unsigned long swap; |
a6198797 MM |
342 | u64 pss; |
343 | }; | |
344 | ||
ae11c4d9 DH |
345 | |
346 | static void smaps_pte_entry(pte_t ptent, unsigned long addr, | |
3c9acc78 | 347 | unsigned long ptent_size, struct mm_walk *walk) |
ae11c4d9 DH |
348 | { |
349 | struct mem_size_stats *mss = walk->private; | |
350 | struct vm_area_struct *vma = mss->vma; | |
351 | struct page *page; | |
352 | int mapcount; | |
353 | ||
354 | if (is_swap_pte(ptent)) { | |
3c9acc78 | 355 | mss->swap += ptent_size; |
ae11c4d9 DH |
356 | return; |
357 | } | |
358 | ||
359 | if (!pte_present(ptent)) | |
360 | return; | |
361 | ||
362 | page = vm_normal_page(vma, addr, ptent); | |
363 | if (!page) | |
364 | return; | |
365 | ||
366 | if (PageAnon(page)) | |
3c9acc78 | 367 | mss->anonymous += ptent_size; |
ae11c4d9 | 368 | |
3c9acc78 | 369 | mss->resident += ptent_size; |
ae11c4d9 DH |
370 | /* Accumulate the size in pages that have been accessed. */ |
371 | if (pte_young(ptent) || PageReferenced(page)) | |
3c9acc78 | 372 | mss->referenced += ptent_size; |
ae11c4d9 DH |
373 | mapcount = page_mapcount(page); |
374 | if (mapcount >= 2) { | |
375 | if (pte_dirty(ptent) || PageDirty(page)) | |
3c9acc78 | 376 | mss->shared_dirty += ptent_size; |
ae11c4d9 | 377 | else |
3c9acc78 DH |
378 | mss->shared_clean += ptent_size; |
379 | mss->pss += (ptent_size << PSS_SHIFT) / mapcount; | |
ae11c4d9 DH |
380 | } else { |
381 | if (pte_dirty(ptent) || PageDirty(page)) | |
3c9acc78 | 382 | mss->private_dirty += ptent_size; |
ae11c4d9 | 383 | else |
3c9acc78 DH |
384 | mss->private_clean += ptent_size; |
385 | mss->pss += (ptent_size << PSS_SHIFT); | |
ae11c4d9 DH |
386 | } |
387 | } | |
388 | ||
b3ae5acb | 389 | static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, |
2165009b | 390 | struct mm_walk *walk) |
e070ad49 | 391 | { |
2165009b | 392 | struct mem_size_stats *mss = walk->private; |
b3ae5acb | 393 | struct vm_area_struct *vma = mss->vma; |
ae11c4d9 | 394 | pte_t *pte; |
705e87c0 | 395 | spinlock_t *ptl; |
e070ad49 | 396 | |
025c5b24 NH |
397 | if (pmd_trans_huge_lock(pmd, vma) == 1) { |
398 | smaps_pte_entry(*(pte_t *)pmd, addr, HPAGE_PMD_SIZE, walk); | |
22e057c5 | 399 | spin_unlock(&walk->mm->page_table_lock); |
025c5b24 NH |
400 | mss->anonymous_thp += HPAGE_PMD_SIZE; |
401 | return 0; | |
22e057c5 | 402 | } |
1a5a9906 AA |
403 | |
404 | if (pmd_trans_unstable(pmd)) | |
405 | return 0; | |
22e057c5 DH |
406 | /* |
407 | * The mmap_sem held all the way back in m_start() is what | |
408 | * keeps khugepaged out of here and from collapsing things | |
409 | * in here. | |
410 | */ | |
705e87c0 | 411 | pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); |
ae11c4d9 | 412 | for (; addr != end; pte++, addr += PAGE_SIZE) |
3c9acc78 | 413 | smaps_pte_entry(*pte, addr, PAGE_SIZE, walk); |
705e87c0 HD |
414 | pte_unmap_unlock(pte - 1, ptl); |
415 | cond_resched(); | |
b3ae5acb | 416 | return 0; |
e070ad49 ML |
417 | } |
418 | ||
e070ad49 ML |
419 | static int show_smap(struct seq_file *m, void *v) |
420 | { | |
7c88db0c JK |
421 | struct proc_maps_private *priv = m->private; |
422 | struct task_struct *task = priv->task; | |
e070ad49 | 423 | struct vm_area_struct *vma = v; |
e070ad49 | 424 | struct mem_size_stats mss; |
2165009b DH |
425 | struct mm_walk smaps_walk = { |
426 | .pmd_entry = smaps_pte_range, | |
427 | .mm = vma->vm_mm, | |
428 | .private = &mss, | |
429 | }; | |
e070ad49 ML |
430 | |
431 | memset(&mss, 0, sizeof mss); | |
b3ae5acb | 432 | mss.vma = vma; |
d82ef020 | 433 | /* mmap_sem is held in m_start */ |
5ddfae16 | 434 | if (vma->vm_mm && !is_vm_hugetlb_page(vma)) |
2165009b | 435 | walk_page_range(vma->vm_start, vma->vm_end, &smaps_walk); |
4752c369 | 436 | |
7c88db0c | 437 | show_map_vma(m, vma); |
4752c369 MM |
438 | |
439 | seq_printf(m, | |
440 | "Size: %8lu kB\n" | |
441 | "Rss: %8lu kB\n" | |
442 | "Pss: %8lu kB\n" | |
443 | "Shared_Clean: %8lu kB\n" | |
444 | "Shared_Dirty: %8lu kB\n" | |
445 | "Private_Clean: %8lu kB\n" | |
446 | "Private_Dirty: %8lu kB\n" | |
214e471f | 447 | "Referenced: %8lu kB\n" |
b40d4f84 | 448 | "Anonymous: %8lu kB\n" |
4031a219 | 449 | "AnonHugePages: %8lu kB\n" |
08fba699 | 450 | "Swap: %8lu kB\n" |
3340289d | 451 | "KernelPageSize: %8lu kB\n" |
2d90508f NK |
452 | "MMUPageSize: %8lu kB\n" |
453 | "Locked: %8lu kB\n", | |
4752c369 MM |
454 | (vma->vm_end - vma->vm_start) >> 10, |
455 | mss.resident >> 10, | |
456 | (unsigned long)(mss.pss >> (10 + PSS_SHIFT)), | |
457 | mss.shared_clean >> 10, | |
458 | mss.shared_dirty >> 10, | |
459 | mss.private_clean >> 10, | |
460 | mss.private_dirty >> 10, | |
214e471f | 461 | mss.referenced >> 10, |
b40d4f84 | 462 | mss.anonymous >> 10, |
4031a219 | 463 | mss.anonymous_thp >> 10, |
08fba699 | 464 | mss.swap >> 10, |
3340289d | 465 | vma_kernel_pagesize(vma) >> 10, |
2d90508f NK |
466 | vma_mmu_pagesize(vma) >> 10, |
467 | (vma->vm_flags & VM_LOCKED) ? | |
468 | (unsigned long)(mss.pss >> (10 + PSS_SHIFT)) : 0); | |
4752c369 | 469 | |
7c88db0c | 470 | if (m->count < m->size) /* vma is copied successfully */ |
31db58b3 SW |
471 | m->version = (vma != get_gate_vma(task->mm)) |
472 | ? vma->vm_start : 0; | |
7c88db0c | 473 | return 0; |
e070ad49 ML |
474 | } |
475 | ||
03a44825 | 476 | static const struct seq_operations proc_pid_smaps_op = { |
a6198797 MM |
477 | .start = m_start, |
478 | .next = m_next, | |
479 | .stop = m_stop, | |
480 | .show = show_smap | |
481 | }; | |
482 | ||
483 | static int smaps_open(struct inode *inode, struct file *file) | |
484 | { | |
485 | return do_maps_open(inode, file, &proc_pid_smaps_op); | |
486 | } | |
487 | ||
488 | const struct file_operations proc_smaps_operations = { | |
489 | .open = smaps_open, | |
490 | .read = seq_read, | |
491 | .llseek = seq_lseek, | |
492 | .release = seq_release_private, | |
493 | }; | |
494 | ||
495 | static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr, | |
2165009b | 496 | unsigned long end, struct mm_walk *walk) |
a6198797 | 497 | { |
2165009b | 498 | struct vm_area_struct *vma = walk->private; |
a6198797 MM |
499 | pte_t *pte, ptent; |
500 | spinlock_t *ptl; | |
501 | struct page *page; | |
502 | ||
03319327 | 503 | split_huge_page_pmd(walk->mm, pmd); |
1a5a9906 AA |
504 | if (pmd_trans_unstable(pmd)) |
505 | return 0; | |
03319327 | 506 | |
a6198797 MM |
507 | pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); |
508 | for (; addr != end; pte++, addr += PAGE_SIZE) { | |
509 | ptent = *pte; | |
510 | if (!pte_present(ptent)) | |
511 | continue; | |
512 | ||
513 | page = vm_normal_page(vma, addr, ptent); | |
514 | if (!page) | |
515 | continue; | |
516 | ||
85e72aa5 WD |
517 | if (PageReserved(page)) |
518 | continue; | |
519 | ||
a6198797 MM |
520 | /* Clear accessed and referenced bits. */ |
521 | ptep_test_and_clear_young(vma, addr, pte); | |
522 | ClearPageReferenced(page); | |
523 | } | |
524 | pte_unmap_unlock(pte - 1, ptl); | |
525 | cond_resched(); | |
526 | return 0; | |
527 | } | |
528 | ||
398499d5 MB |
529 | #define CLEAR_REFS_ALL 1 |
530 | #define CLEAR_REFS_ANON 2 | |
531 | #define CLEAR_REFS_MAPPED 3 | |
532 | ||
f248dcb3 MM |
533 | static ssize_t clear_refs_write(struct file *file, const char __user *buf, |
534 | size_t count, loff_t *ppos) | |
b813e931 | 535 | { |
f248dcb3 | 536 | struct task_struct *task; |
fb92a4b0 | 537 | char buffer[PROC_NUMBUF]; |
f248dcb3 | 538 | struct mm_struct *mm; |
b813e931 | 539 | struct vm_area_struct *vma; |
0a8cb8e3 AD |
540 | int type; |
541 | int rv; | |
b813e931 | 542 | |
f248dcb3 MM |
543 | memset(buffer, 0, sizeof(buffer)); |
544 | if (count > sizeof(buffer) - 1) | |
545 | count = sizeof(buffer) - 1; | |
546 | if (copy_from_user(buffer, buf, count)) | |
547 | return -EFAULT; | |
0a8cb8e3 AD |
548 | rv = kstrtoint(strstrip(buffer), 10, &type); |
549 | if (rv < 0) | |
550 | return rv; | |
398499d5 | 551 | if (type < CLEAR_REFS_ALL || type > CLEAR_REFS_MAPPED) |
f248dcb3 | 552 | return -EINVAL; |
f248dcb3 MM |
553 | task = get_proc_task(file->f_path.dentry->d_inode); |
554 | if (!task) | |
555 | return -ESRCH; | |
556 | mm = get_task_mm(task); | |
557 | if (mm) { | |
20cbc972 AM |
558 | struct mm_walk clear_refs_walk = { |
559 | .pmd_entry = clear_refs_pte_range, | |
560 | .mm = mm, | |
561 | }; | |
f248dcb3 | 562 | down_read(&mm->mmap_sem); |
2165009b DH |
563 | for (vma = mm->mmap; vma; vma = vma->vm_next) { |
564 | clear_refs_walk.private = vma; | |
398499d5 MB |
565 | if (is_vm_hugetlb_page(vma)) |
566 | continue; | |
567 | /* | |
568 | * Writing 1 to /proc/pid/clear_refs affects all pages. | |
569 | * | |
570 | * Writing 2 to /proc/pid/clear_refs only affects | |
571 | * Anonymous pages. | |
572 | * | |
573 | * Writing 3 to /proc/pid/clear_refs only affects file | |
574 | * mapped pages. | |
575 | */ | |
576 | if (type == CLEAR_REFS_ANON && vma->vm_file) | |
577 | continue; | |
578 | if (type == CLEAR_REFS_MAPPED && !vma->vm_file) | |
579 | continue; | |
580 | walk_page_range(vma->vm_start, vma->vm_end, | |
581 | &clear_refs_walk); | |
2165009b | 582 | } |
f248dcb3 MM |
583 | flush_tlb_mm(mm); |
584 | up_read(&mm->mmap_sem); | |
585 | mmput(mm); | |
586 | } | |
587 | put_task_struct(task); | |
fb92a4b0 VL |
588 | |
589 | return count; | |
b813e931 DR |
590 | } |
591 | ||
f248dcb3 MM |
592 | const struct file_operations proc_clear_refs_operations = { |
593 | .write = clear_refs_write, | |
6038f373 | 594 | .llseek = noop_llseek, |
f248dcb3 MM |
595 | }; |
596 | ||
85863e47 | 597 | struct pagemapread { |
d82ef020 KH |
598 | int pos, len; |
599 | u64 *buffer; | |
85863e47 MM |
600 | }; |
601 | ||
5aaabe83 NH |
602 | #define PAGEMAP_WALK_SIZE (PMD_SIZE) |
603 | #define PAGEMAP_WALK_MASK (PMD_MASK) | |
604 | ||
f16278c6 HR |
605 | #define PM_ENTRY_BYTES sizeof(u64) |
606 | #define PM_STATUS_BITS 3 | |
607 | #define PM_STATUS_OFFSET (64 - PM_STATUS_BITS) | |
608 | #define PM_STATUS_MASK (((1LL << PM_STATUS_BITS) - 1) << PM_STATUS_OFFSET) | |
609 | #define PM_STATUS(nr) (((nr) << PM_STATUS_OFFSET) & PM_STATUS_MASK) | |
610 | #define PM_PSHIFT_BITS 6 | |
611 | #define PM_PSHIFT_OFFSET (PM_STATUS_OFFSET - PM_PSHIFT_BITS) | |
612 | #define PM_PSHIFT_MASK (((1LL << PM_PSHIFT_BITS) - 1) << PM_PSHIFT_OFFSET) | |
613 | #define PM_PSHIFT(x) (((u64) (x) << PM_PSHIFT_OFFSET) & PM_PSHIFT_MASK) | |
614 | #define PM_PFRAME_MASK ((1LL << PM_PSHIFT_OFFSET) - 1) | |
615 | #define PM_PFRAME(x) ((x) & PM_PFRAME_MASK) | |
616 | ||
617 | #define PM_PRESENT PM_STATUS(4LL) | |
618 | #define PM_SWAP PM_STATUS(2LL) | |
619 | #define PM_NOT_PRESENT PM_PSHIFT(PAGE_SHIFT) | |
85863e47 MM |
620 | #define PM_END_OF_BUFFER 1 |
621 | ||
622 | static int add_to_pagemap(unsigned long addr, u64 pfn, | |
623 | struct pagemapread *pm) | |
624 | { | |
d82ef020 KH |
625 | pm->buffer[pm->pos++] = pfn; |
626 | if (pm->pos >= pm->len) | |
aae8679b | 627 | return PM_END_OF_BUFFER; |
85863e47 MM |
628 | return 0; |
629 | } | |
630 | ||
631 | static int pagemap_pte_hole(unsigned long start, unsigned long end, | |
2165009b | 632 | struct mm_walk *walk) |
85863e47 | 633 | { |
2165009b | 634 | struct pagemapread *pm = walk->private; |
85863e47 MM |
635 | unsigned long addr; |
636 | int err = 0; | |
637 | for (addr = start; addr < end; addr += PAGE_SIZE) { | |
638 | err = add_to_pagemap(addr, PM_NOT_PRESENT, pm); | |
639 | if (err) | |
640 | break; | |
641 | } | |
642 | return err; | |
643 | } | |
644 | ||
9d02dbc8 | 645 | static u64 swap_pte_to_pagemap_entry(pte_t pte) |
85863e47 MM |
646 | { |
647 | swp_entry_t e = pte_to_swp_entry(pte); | |
f16278c6 | 648 | return swp_type(e) | (swp_offset(e) << MAX_SWAPFILES_SHIFT); |
85863e47 MM |
649 | } |
650 | ||
49c50342 | 651 | static u64 pte_to_pagemap_entry(pte_t pte) |
bcf8039e | 652 | { |
49c50342 | 653 | u64 pme = 0; |
bcf8039e DH |
654 | if (is_swap_pte(pte)) |
655 | pme = PM_PFRAME(swap_pte_to_pagemap_entry(pte)) | |
656 | | PM_PSHIFT(PAGE_SHIFT) | PM_SWAP; | |
657 | else if (pte_present(pte)) | |
658 | pme = PM_PFRAME(pte_pfn(pte)) | |
659 | | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT; | |
660 | return pme; | |
661 | } | |
662 | ||
5aaabe83 NH |
663 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
664 | static u64 thp_pmd_to_pagemap_entry(pmd_t pmd, int offset) | |
665 | { | |
666 | u64 pme = 0; | |
667 | /* | |
668 | * Currently pmd for thp is always present because thp can not be | |
669 | * swapped-out, migrated, or HWPOISONed (split in such cases instead.) | |
670 | * This if-check is just to prepare for future implementation. | |
671 | */ | |
672 | if (pmd_present(pmd)) | |
673 | pme = PM_PFRAME(pmd_pfn(pmd) + offset) | |
674 | | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT; | |
675 | return pme; | |
676 | } | |
677 | #else | |
678 | static inline u64 thp_pmd_to_pagemap_entry(pmd_t pmd, int offset) | |
679 | { | |
680 | return 0; | |
681 | } | |
682 | #endif | |
683 | ||
85863e47 | 684 | static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, |
2165009b | 685 | struct mm_walk *walk) |
85863e47 | 686 | { |
bcf8039e | 687 | struct vm_area_struct *vma; |
2165009b | 688 | struct pagemapread *pm = walk->private; |
85863e47 MM |
689 | pte_t *pte; |
690 | int err = 0; | |
5aaabe83 | 691 | u64 pfn = PM_NOT_PRESENT; |
85863e47 | 692 | |
1a5a9906 AA |
693 | if (pmd_trans_unstable(pmd)) |
694 | return 0; | |
03319327 | 695 | |
bcf8039e DH |
696 | /* find the first VMA at or above 'addr' */ |
697 | vma = find_vma(walk->mm, addr); | |
5aaabe83 | 698 | spin_lock(&walk->mm->page_table_lock); |
025c5b24 NH |
699 | if (pmd_trans_huge_lock(pmd, vma) == 1) { |
700 | for (; addr != end; addr += PAGE_SIZE) { | |
701 | unsigned long offset; | |
702 | ||
703 | offset = (addr & ~PAGEMAP_WALK_MASK) >> | |
704 | PAGE_SHIFT; | |
705 | pfn = thp_pmd_to_pagemap_entry(*pmd, offset); | |
706 | err = add_to_pagemap(addr, pfn, pm); | |
707 | if (err) | |
708 | break; | |
5aaabe83 | 709 | } |
5aaabe83 | 710 | spin_unlock(&walk->mm->page_table_lock); |
025c5b24 | 711 | return err; |
5aaabe83 NH |
712 | } |
713 | ||
85863e47 | 714 | for (; addr != end; addr += PAGE_SIZE) { |
bcf8039e DH |
715 | |
716 | /* check to see if we've left 'vma' behind | |
717 | * and need a new, higher one */ | |
718 | if (vma && (addr >= vma->vm_end)) | |
719 | vma = find_vma(walk->mm, addr); | |
720 | ||
721 | /* check that 'vma' actually covers this address, | |
722 | * and that it isn't a huge page vma */ | |
723 | if (vma && (vma->vm_start <= addr) && | |
724 | !is_vm_hugetlb_page(vma)) { | |
725 | pte = pte_offset_map(pmd, addr); | |
726 | pfn = pte_to_pagemap_entry(*pte); | |
727 | /* unmap before userspace copy */ | |
728 | pte_unmap(pte); | |
729 | } | |
85863e47 MM |
730 | err = add_to_pagemap(addr, pfn, pm); |
731 | if (err) | |
732 | return err; | |
733 | } | |
734 | ||
735 | cond_resched(); | |
736 | ||
737 | return err; | |
738 | } | |
739 | ||
1a5cb814 | 740 | #ifdef CONFIG_HUGETLB_PAGE |
5dc37642 NH |
741 | static u64 huge_pte_to_pagemap_entry(pte_t pte, int offset) |
742 | { | |
743 | u64 pme = 0; | |
744 | if (pte_present(pte)) | |
745 | pme = PM_PFRAME(pte_pfn(pte) + offset) | |
746 | | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT; | |
747 | return pme; | |
748 | } | |
749 | ||
116354d1 NH |
750 | /* This function walks within one hugetlb entry in the single call */ |
751 | static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask, | |
752 | unsigned long addr, unsigned long end, | |
753 | struct mm_walk *walk) | |
5dc37642 | 754 | { |
5dc37642 | 755 | struct pagemapread *pm = walk->private; |
5dc37642 | 756 | int err = 0; |
116354d1 | 757 | u64 pfn; |
5dc37642 | 758 | |
5dc37642 | 759 | for (; addr != end; addr += PAGE_SIZE) { |
116354d1 NH |
760 | int offset = (addr & ~hmask) >> PAGE_SHIFT; |
761 | pfn = huge_pte_to_pagemap_entry(*pte, offset); | |
5dc37642 NH |
762 | err = add_to_pagemap(addr, pfn, pm); |
763 | if (err) | |
764 | return err; | |
765 | } | |
766 | ||
767 | cond_resched(); | |
768 | ||
769 | return err; | |
770 | } | |
1a5cb814 | 771 | #endif /* HUGETLB_PAGE */ |
5dc37642 | 772 | |
85863e47 MM |
773 | /* |
774 | * /proc/pid/pagemap - an array mapping virtual pages to pfns | |
775 | * | |
f16278c6 HR |
776 | * For each page in the address space, this file contains one 64-bit entry |
777 | * consisting of the following: | |
778 | * | |
779 | * Bits 0-55 page frame number (PFN) if present | |
780 | * Bits 0-4 swap type if swapped | |
781 | * Bits 5-55 swap offset if swapped | |
782 | * Bits 55-60 page shift (page size = 1<<page shift) | |
783 | * Bit 61 reserved for future use | |
784 | * Bit 62 page swapped | |
785 | * Bit 63 page present | |
786 | * | |
787 | * If the page is not present but in swap, then the PFN contains an | |
788 | * encoding of the swap file number and the page's offset into the | |
789 | * swap. Unmapped pages return a null PFN. This allows determining | |
85863e47 MM |
790 | * precisely which pages are mapped (or in swap) and comparing mapped |
791 | * pages between processes. | |
792 | * | |
793 | * Efficient users of this interface will use /proc/pid/maps to | |
794 | * determine which areas of memory are actually mapped and llseek to | |
795 | * skip over unmapped regions. | |
796 | */ | |
797 | static ssize_t pagemap_read(struct file *file, char __user *buf, | |
798 | size_t count, loff_t *ppos) | |
799 | { | |
800 | struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode); | |
85863e47 MM |
801 | struct mm_struct *mm; |
802 | struct pagemapread pm; | |
85863e47 | 803 | int ret = -ESRCH; |
ee1e6ab6 | 804 | struct mm_walk pagemap_walk = {}; |
5d7e0d2b AM |
805 | unsigned long src; |
806 | unsigned long svpfn; | |
807 | unsigned long start_vaddr; | |
808 | unsigned long end_vaddr; | |
d82ef020 | 809 | int copied = 0; |
85863e47 MM |
810 | |
811 | if (!task) | |
812 | goto out; | |
813 | ||
85863e47 MM |
814 | ret = -EINVAL; |
815 | /* file position must be aligned */ | |
aae8679b | 816 | if ((*ppos % PM_ENTRY_BYTES) || (count % PM_ENTRY_BYTES)) |
fb39380b | 817 | goto out_task; |
85863e47 MM |
818 | |
819 | ret = 0; | |
08161786 VM |
820 | if (!count) |
821 | goto out_task; | |
822 | ||
d82ef020 KH |
823 | pm.len = PM_ENTRY_BYTES * (PAGEMAP_WALK_SIZE >> PAGE_SHIFT); |
824 | pm.buffer = kmalloc(pm.len, GFP_TEMPORARY); | |
5d7e0d2b | 825 | ret = -ENOMEM; |
d82ef020 | 826 | if (!pm.buffer) |
98bc93e5 KM |
827 | goto out_task; |
828 | ||
829 | mm = mm_for_maps(task); | |
830 | ret = PTR_ERR(mm); | |
831 | if (!mm || IS_ERR(mm)) | |
832 | goto out_free; | |
85863e47 | 833 | |
5d7e0d2b AM |
834 | pagemap_walk.pmd_entry = pagemap_pte_range; |
835 | pagemap_walk.pte_hole = pagemap_pte_hole; | |
1a5cb814 | 836 | #ifdef CONFIG_HUGETLB_PAGE |
5dc37642 | 837 | pagemap_walk.hugetlb_entry = pagemap_hugetlb_range; |
1a5cb814 | 838 | #endif |
5d7e0d2b AM |
839 | pagemap_walk.mm = mm; |
840 | pagemap_walk.private = ± | |
841 | ||
842 | src = *ppos; | |
843 | svpfn = src / PM_ENTRY_BYTES; | |
844 | start_vaddr = svpfn << PAGE_SHIFT; | |
845 | end_vaddr = TASK_SIZE_OF(task); | |
846 | ||
847 | /* watch out for wraparound */ | |
848 | if (svpfn > TASK_SIZE_OF(task) >> PAGE_SHIFT) | |
849 | start_vaddr = end_vaddr; | |
850 | ||
851 | /* | |
852 | * The odds are that this will stop walking way | |
853 | * before end_vaddr, because the length of the | |
854 | * user buffer is tracked in "pm", and the walk | |
855 | * will stop when we hit the end of the buffer. | |
856 | */ | |
d82ef020 KH |
857 | ret = 0; |
858 | while (count && (start_vaddr < end_vaddr)) { | |
859 | int len; | |
860 | unsigned long end; | |
861 | ||
862 | pm.pos = 0; | |
ea251c1d | 863 | end = (start_vaddr + PAGEMAP_WALK_SIZE) & PAGEMAP_WALK_MASK; |
d82ef020 KH |
864 | /* overflow ? */ |
865 | if (end < start_vaddr || end > end_vaddr) | |
866 | end = end_vaddr; | |
867 | down_read(&mm->mmap_sem); | |
868 | ret = walk_page_range(start_vaddr, end, &pagemap_walk); | |
869 | up_read(&mm->mmap_sem); | |
870 | start_vaddr = end; | |
871 | ||
872 | len = min(count, PM_ENTRY_BYTES * pm.pos); | |
309361e0 | 873 | if (copy_to_user(buf, pm.buffer, len)) { |
d82ef020 | 874 | ret = -EFAULT; |
98bc93e5 | 875 | goto out_mm; |
d82ef020 KH |
876 | } |
877 | copied += len; | |
878 | buf += len; | |
879 | count -= len; | |
85863e47 | 880 | } |
d82ef020 KH |
881 | *ppos += copied; |
882 | if (!ret || ret == PM_END_OF_BUFFER) | |
883 | ret = copied; | |
884 | ||
fb39380b MT |
885 | out_mm: |
886 | mmput(mm); | |
98bc93e5 KM |
887 | out_free: |
888 | kfree(pm.buffer); | |
85863e47 MM |
889 | out_task: |
890 | put_task_struct(task); | |
891 | out: | |
892 | return ret; | |
893 | } | |
894 | ||
895 | const struct file_operations proc_pagemap_operations = { | |
896 | .llseek = mem_lseek, /* borrow this */ | |
897 | .read = pagemap_read, | |
898 | }; | |
1e883281 | 899 | #endif /* CONFIG_PROC_PAGE_MONITOR */ |
85863e47 | 900 | |
6e21c8f1 | 901 | #ifdef CONFIG_NUMA |
6e21c8f1 | 902 | |
f69ff943 SW |
903 | struct numa_maps { |
904 | struct vm_area_struct *vma; | |
905 | unsigned long pages; | |
906 | unsigned long anon; | |
907 | unsigned long active; | |
908 | unsigned long writeback; | |
909 | unsigned long mapcount_max; | |
910 | unsigned long dirty; | |
911 | unsigned long swapcache; | |
912 | unsigned long node[MAX_NUMNODES]; | |
913 | }; | |
914 | ||
5b52fc89 SW |
915 | struct numa_maps_private { |
916 | struct proc_maps_private proc_maps; | |
917 | struct numa_maps md; | |
918 | }; | |
919 | ||
eb4866d0 DH |
920 | static void gather_stats(struct page *page, struct numa_maps *md, int pte_dirty, |
921 | unsigned long nr_pages) | |
f69ff943 SW |
922 | { |
923 | int count = page_mapcount(page); | |
924 | ||
eb4866d0 | 925 | md->pages += nr_pages; |
f69ff943 | 926 | if (pte_dirty || PageDirty(page)) |
eb4866d0 | 927 | md->dirty += nr_pages; |
f69ff943 SW |
928 | |
929 | if (PageSwapCache(page)) | |
eb4866d0 | 930 | md->swapcache += nr_pages; |
f69ff943 SW |
931 | |
932 | if (PageActive(page) || PageUnevictable(page)) | |
eb4866d0 | 933 | md->active += nr_pages; |
f69ff943 SW |
934 | |
935 | if (PageWriteback(page)) | |
eb4866d0 | 936 | md->writeback += nr_pages; |
f69ff943 SW |
937 | |
938 | if (PageAnon(page)) | |
eb4866d0 | 939 | md->anon += nr_pages; |
f69ff943 SW |
940 | |
941 | if (count > md->mapcount_max) | |
942 | md->mapcount_max = count; | |
943 | ||
eb4866d0 | 944 | md->node[page_to_nid(page)] += nr_pages; |
f69ff943 SW |
945 | } |
946 | ||
3200a8aa DH |
947 | static struct page *can_gather_numa_stats(pte_t pte, struct vm_area_struct *vma, |
948 | unsigned long addr) | |
949 | { | |
950 | struct page *page; | |
951 | int nid; | |
952 | ||
953 | if (!pte_present(pte)) | |
954 | return NULL; | |
955 | ||
956 | page = vm_normal_page(vma, addr, pte); | |
957 | if (!page) | |
958 | return NULL; | |
959 | ||
960 | if (PageReserved(page)) | |
961 | return NULL; | |
962 | ||
963 | nid = page_to_nid(page); | |
964 | if (!node_isset(nid, node_states[N_HIGH_MEMORY])) | |
965 | return NULL; | |
966 | ||
967 | return page; | |
968 | } | |
969 | ||
f69ff943 SW |
970 | static int gather_pte_stats(pmd_t *pmd, unsigned long addr, |
971 | unsigned long end, struct mm_walk *walk) | |
972 | { | |
973 | struct numa_maps *md; | |
974 | spinlock_t *ptl; | |
975 | pte_t *orig_pte; | |
976 | pte_t *pte; | |
977 | ||
978 | md = walk->private; | |
025c5b24 NH |
979 | |
980 | if (pmd_trans_huge_lock(pmd, md->vma) == 1) { | |
981 | pte_t huge_pte = *(pte_t *)pmd; | |
982 | struct page *page; | |
983 | ||
984 | page = can_gather_numa_stats(huge_pte, md->vma, addr); | |
985 | if (page) | |
986 | gather_stats(page, md, pte_dirty(huge_pte), | |
987 | HPAGE_PMD_SIZE/PAGE_SIZE); | |
32ef4384 | 988 | spin_unlock(&walk->mm->page_table_lock); |
025c5b24 | 989 | return 0; |
32ef4384 DH |
990 | } |
991 | ||
1a5a9906 AA |
992 | if (pmd_trans_unstable(pmd)) |
993 | return 0; | |
f69ff943 SW |
994 | orig_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl); |
995 | do { | |
3200a8aa | 996 | struct page *page = can_gather_numa_stats(*pte, md->vma, addr); |
f69ff943 SW |
997 | if (!page) |
998 | continue; | |
eb4866d0 | 999 | gather_stats(page, md, pte_dirty(*pte), 1); |
f69ff943 SW |
1000 | |
1001 | } while (pte++, addr += PAGE_SIZE, addr != end); | |
1002 | pte_unmap_unlock(orig_pte, ptl); | |
1003 | return 0; | |
1004 | } | |
1005 | #ifdef CONFIG_HUGETLB_PAGE | |
1006 | static int gather_hugetbl_stats(pte_t *pte, unsigned long hmask, | |
1007 | unsigned long addr, unsigned long end, struct mm_walk *walk) | |
1008 | { | |
1009 | struct numa_maps *md; | |
1010 | struct page *page; | |
1011 | ||
1012 | if (pte_none(*pte)) | |
1013 | return 0; | |
1014 | ||
1015 | page = pte_page(*pte); | |
1016 | if (!page) | |
1017 | return 0; | |
1018 | ||
1019 | md = walk->private; | |
eb4866d0 | 1020 | gather_stats(page, md, pte_dirty(*pte), 1); |
f69ff943 SW |
1021 | return 0; |
1022 | } | |
1023 | ||
1024 | #else | |
1025 | static int gather_hugetbl_stats(pte_t *pte, unsigned long hmask, | |
1026 | unsigned long addr, unsigned long end, struct mm_walk *walk) | |
1027 | { | |
1028 | return 0; | |
1029 | } | |
1030 | #endif | |
1031 | ||
1032 | /* | |
1033 | * Display pages allocated per node and memory policy via /proc. | |
1034 | */ | |
1035 | static int show_numa_map(struct seq_file *m, void *v) | |
1036 | { | |
5b52fc89 SW |
1037 | struct numa_maps_private *numa_priv = m->private; |
1038 | struct proc_maps_private *proc_priv = &numa_priv->proc_maps; | |
f69ff943 | 1039 | struct vm_area_struct *vma = v; |
5b52fc89 | 1040 | struct numa_maps *md = &numa_priv->md; |
f69ff943 SW |
1041 | struct file *file = vma->vm_file; |
1042 | struct mm_struct *mm = vma->vm_mm; | |
1043 | struct mm_walk walk = {}; | |
1044 | struct mempolicy *pol; | |
1045 | int n; | |
1046 | char buffer[50]; | |
1047 | ||
1048 | if (!mm) | |
1049 | return 0; | |
1050 | ||
5b52fc89 SW |
1051 | /* Ensure we start with an empty set of numa_maps statistics. */ |
1052 | memset(md, 0, sizeof(*md)); | |
f69ff943 SW |
1053 | |
1054 | md->vma = vma; | |
1055 | ||
1056 | walk.hugetlb_entry = gather_hugetbl_stats; | |
1057 | walk.pmd_entry = gather_pte_stats; | |
1058 | walk.private = md; | |
1059 | walk.mm = mm; | |
1060 | ||
5b52fc89 | 1061 | pol = get_vma_policy(proc_priv->task, vma, vma->vm_start); |
f69ff943 SW |
1062 | mpol_to_str(buffer, sizeof(buffer), pol, 0); |
1063 | mpol_cond_put(pol); | |
1064 | ||
1065 | seq_printf(m, "%08lx %s", vma->vm_start, buffer); | |
1066 | ||
1067 | if (file) { | |
1068 | seq_printf(m, " file="); | |
1069 | seq_path(m, &file->f_path, "\n\t= "); | |
1070 | } else if (vma->vm_start <= mm->brk && vma->vm_end >= mm->start_brk) { | |
1071 | seq_printf(m, " heap"); | |
1072 | } else if (vma->vm_start <= mm->start_stack && | |
1073 | vma->vm_end >= mm->start_stack) { | |
1074 | seq_printf(m, " stack"); | |
1075 | } | |
1076 | ||
fc360bd9 AM |
1077 | if (is_vm_hugetlb_page(vma)) |
1078 | seq_printf(m, " huge"); | |
1079 | ||
f69ff943 SW |
1080 | walk_page_range(vma->vm_start, vma->vm_end, &walk); |
1081 | ||
1082 | if (!md->pages) | |
1083 | goto out; | |
1084 | ||
1085 | if (md->anon) | |
1086 | seq_printf(m, " anon=%lu", md->anon); | |
1087 | ||
1088 | if (md->dirty) | |
1089 | seq_printf(m, " dirty=%lu", md->dirty); | |
1090 | ||
1091 | if (md->pages != md->anon && md->pages != md->dirty) | |
1092 | seq_printf(m, " mapped=%lu", md->pages); | |
1093 | ||
1094 | if (md->mapcount_max > 1) | |
1095 | seq_printf(m, " mapmax=%lu", md->mapcount_max); | |
1096 | ||
1097 | if (md->swapcache) | |
1098 | seq_printf(m, " swapcache=%lu", md->swapcache); | |
1099 | ||
1100 | if (md->active < md->pages && !is_vm_hugetlb_page(vma)) | |
1101 | seq_printf(m, " active=%lu", md->active); | |
1102 | ||
1103 | if (md->writeback) | |
1104 | seq_printf(m, " writeback=%lu", md->writeback); | |
1105 | ||
1106 | for_each_node_state(n, N_HIGH_MEMORY) | |
1107 | if (md->node[n]) | |
1108 | seq_printf(m, " N%d=%lu", n, md->node[n]); | |
1109 | out: | |
1110 | seq_putc(m, '\n'); | |
f69ff943 SW |
1111 | |
1112 | if (m->count < m->size) | |
5b52fc89 | 1113 | m->version = (vma != proc_priv->tail_vma) ? vma->vm_start : 0; |
f69ff943 SW |
1114 | return 0; |
1115 | } | |
5b52fc89 | 1116 | |
03a44825 | 1117 | static const struct seq_operations proc_pid_numa_maps_op = { |
1a75a6c8 CL |
1118 | .start = m_start, |
1119 | .next = m_next, | |
1120 | .stop = m_stop, | |
3bbfe059 | 1121 | .show = show_numa_map, |
6e21c8f1 | 1122 | }; |
662795de EB |
1123 | |
1124 | static int numa_maps_open(struct inode *inode, struct file *file) | |
1125 | { | |
5b52fc89 SW |
1126 | struct numa_maps_private *priv; |
1127 | int ret = -ENOMEM; | |
1128 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
1129 | if (priv) { | |
1130 | priv->proc_maps.pid = proc_pid(inode); | |
1131 | ret = seq_open(file, &proc_pid_numa_maps_op); | |
1132 | if (!ret) { | |
1133 | struct seq_file *m = file->private_data; | |
1134 | m->private = priv; | |
1135 | } else { | |
1136 | kfree(priv); | |
1137 | } | |
1138 | } | |
1139 | return ret; | |
662795de EB |
1140 | } |
1141 | ||
00977a59 | 1142 | const struct file_operations proc_numa_maps_operations = { |
662795de EB |
1143 | .open = numa_maps_open, |
1144 | .read = seq_read, | |
1145 | .llseek = seq_lseek, | |
99f89551 | 1146 | .release = seq_release_private, |
662795de | 1147 | }; |
f69ff943 | 1148 | #endif /* CONFIG_NUMA */ |