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