blob: 7c708a418acc38412f4a4d77626be3dc4b39e03f [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/mm.h>
2#include <linux/hugetlb.h>
Dave Hansen22e057c2011-03-22 16:33:00 -07003#include <linux/huge_mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07004#include <linux/mount.h>
5#include <linux/seq_file.h>
Mauricio Line070ad42005-09-03 15:55:10 -07006#include <linux/highmem.h>
Kees Cook5096add2007-05-08 00:26:04 -07007#include <linux/ptrace.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09008#include <linux/slab.h>
Christoph Lameter6e21c8f2005-09-03 15:54:45 -07009#include <linux/pagemap.h>
10#include <linux/mempolicy.h>
Dave Hansen22e057c2011-03-22 16:33:00 -070011#include <linux/rmap.h>
Matt Mackall85863e42008-02-04 22:29:04 -080012#include <linux/swap.h>
13#include <linux/swapops.h>
Mauricio Line070ad42005-09-03 15:55:10 -070014
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <asm/elf.h>
16#include <asm/uaccess.h>
Mauricio Line070ad42005-09-03 15:55:10 -070017#include <asm/tlbflush.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "internal.h"
19
Eric W. Biedermandf5f8312008-02-08 04:18:33 -080020void task_mem(struct seq_file *m, struct mm_struct *mm)
Linus Torvalds1da177e2005-04-16 15:20:36 -070021{
KAMEZAWA Hiroyukib084d432010-03-05 13:41:42 -080022 unsigned long data, text, lib, swap;
Hugh Dickins365e9c872005-10-29 18:16:18 -070023 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
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;
KAMEZAWA Hiroyukib084d432010-03-05 13:41:42 -080042 swap = get_mm_counter(mm, MM_SWAPENTS);
Eric W. Biedermandf5f8312008-02-08 04:18:33 -080043 seq_printf(m,
Hugh Dickins365e9c872005-10-29 18:16:18 -070044 "VmPeak:\t%8lu kB\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 "VmSize:\t%8lu kB\n"
46 "VmLck:\t%8lu kB\n"
Hugh Dickins365e9c872005-10-29 18:16:18 -070047 "VmHWM:\t%8lu kB\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 "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"
KAMEZAWA Hiroyukib084d432010-03-05 13:41:42 -080053 "VmPTE:\t%8lu kB\n"
54 "VmSwap:\t%8lu kB\n",
Hugh Dickins365e9c872005-10-29 18:16:18 -070055 hiwater_vm << (PAGE_SHIFT-10),
56 (total_vm - mm->reserved_vm) << (PAGE_SHIFT-10),
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 mm->locked_vm << (PAGE_SHIFT-10),
Hugh Dickins365e9c872005-10-29 18:16:18 -070058 hiwater_rss << (PAGE_SHIFT-10),
59 total_rss << (PAGE_SHIFT-10),
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 data << (PAGE_SHIFT-10),
61 mm->stack_vm << (PAGE_SHIFT-10), text, lib,
KAMEZAWA Hiroyukib084d432010-03-05 13:41:42 -080062 (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10,
63 swap << (PAGE_SHIFT-10));
Linus Torvalds1da177e2005-04-16 15:20:36 -070064}
65
66unsigned long task_vsize(struct mm_struct *mm)
67{
68 return PAGE_SIZE * mm->total_vm;
69}
70
Alexey Dobriyana2ade7b2011-01-12 17:00:32 -080071unsigned long task_statm(struct mm_struct *mm,
72 unsigned long *shared, unsigned long *text,
73 unsigned long *data, unsigned long *resident)
Linus Torvalds1da177e2005-04-16 15:20:36 -070074{
KAMEZAWA Hiroyukid559db02010-03-05 13:41:39 -080075 *shared = get_mm_counter(mm, MM_FILEPAGES);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
77 >> PAGE_SHIFT;
78 *data = mm->total_vm - mm->shared_vm;
KAMEZAWA Hiroyukid559db02010-03-05 13:41:39 -080079 *resident = *shared + get_mm_counter(mm, MM_ANONPAGES);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 return mm->total_vm;
81}
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083static 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
Matt Mackalla6198792008-02-04 22:29:03 -080091static void vma_stop(struct proc_maps_private *priv, struct vm_area_struct *vma)
Mauricio Line070ad42005-09-03 15:55:10 -070092{
Matt Mackalla6198792008-02-04 22:29:03 -080093 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}
99
100static void *m_start(struct seq_file *m, loff_t *pos)
101{
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)
Al Viroec6fd8a2011-02-15 22:22:54 -0500124 return ERR_PTR(-ESRCH);
Matt Mackalla6198792008-02-04 22:29:03 -0800125
126 mm = mm_for_maps(priv->task);
Al Viroec6fd8a2011-02-15 22:22:54 -0500127 if (!mm || IS_ERR(mm))
128 return mm;
Oleg Nesterov00f89d22009-07-10 03:27:38 +0200129 down_read(&mm->mmap_sem);
Matt Mackalla6198792008-02-04 22:29:03 -0800130
Stephen Wilson31db58b2011-03-13 15:49:15 -0400131 tail_vma = get_gate_vma(priv->task->mm);
Matt Mackalla6198792008-02-04 22:29:03 -0800132 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
156out:
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
167static 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
180static 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
185 vma_stop(priv, vma);
186 if (priv->task)
187 put_task_struct(priv->task);
188}
189
190static int do_maps_open(struct inode *inode, struct file *file,
Jan Engelhardt03a44822008-02-08 04:21:19 -0800191 const struct seq_operations *ops)
Matt Mackalla6198792008-02-04 22:29:03 -0800192{
193 struct proc_maps_private *priv;
194 int ret = -ENOMEM;
195 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
196 if (priv) {
197 priv->pid = proc_pid(inode);
198 ret = seq_open(file, ops);
199 if (!ret) {
200 struct seq_file *m = file->private_data;
201 m->private = priv;
202 } else {
203 kfree(priv);
204 }
205 }
206 return ret;
207}
Mauricio Line070ad42005-09-03 15:55:10 -0700208
Joe Korty7c88db02008-10-16 15:27:09 +0400209static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210{
Mauricio Line070ad42005-09-03 15:55:10 -0700211 struct mm_struct *mm = vma->vm_mm;
212 struct file *file = vma->vm_file;
213 int flags = vma->vm_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 unsigned long ino = 0;
KAMEZAWA Hiroyuki6260a4b2009-04-06 19:00:30 -0700215 unsigned long long pgoff = 0;
Linus Torvaldsd7824372010-08-15 11:35:52 -0700216 unsigned long start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 dev_t dev = 0;
218 int len;
219
220 if (file) {
Josef "Jeff" Sipek2fddfee2006-12-08 02:36:36 -0800221 struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 dev = inode->i_sb->s_dev;
223 ino = inode->i_ino;
KAMEZAWA Hiroyuki6260a4b2009-04-06 19:00:30 -0700224 pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 }
226
Linus Torvaldsd7824372010-08-15 11:35:52 -0700227 /* We don't show the stack guard page in /proc/maps */
228 start = vma->vm_start;
229 if (vma->vm_flags & VM_GROWSDOWN)
Stefan Bader39aa3cb2010-08-31 15:52:27 +0200230 if (!vma_stack_continue(vma->vm_prev, vma->vm_start))
231 start += PAGE_SIZE;
Linus Torvaldsd7824372010-08-15 11:35:52 -0700232
Clement Calmels1804dc62008-08-20 14:09:00 -0700233 seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n",
Linus Torvaldsd7824372010-08-15 11:35:52 -0700234 start,
Mauricio Line070ad42005-09-03 15:55:10 -0700235 vma->vm_end,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 flags & VM_READ ? 'r' : '-',
237 flags & VM_WRITE ? 'w' : '-',
238 flags & VM_EXEC ? 'x' : '-',
239 flags & VM_MAYSHARE ? 's' : 'p',
KAMEZAWA Hiroyuki6260a4b2009-04-06 19:00:30 -0700240 pgoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 MAJOR(dev), MINOR(dev), ino, &len);
242
243 /*
244 * Print the dentry name for named mappings, and a
245 * special [heap] marker for the heap:
246 */
Mauricio Line070ad42005-09-03 15:55:10 -0700247 if (file) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 pad_len_spaces(m, len);
Jan Blunckc32c2f62008-02-14 19:38:43 -0800249 seq_path(m, &file->f_path, "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 } else {
Ingo Molnare6e54942006-06-27 02:53:50 -0700251 const char *name = arch_vma_name(vma);
252 if (!name) {
253 if (mm) {
Aaro Koskinen0db0c012011-03-23 16:42:50 -0700254 if (vma->vm_start <= mm->brk &&
255 vma->vm_end >= mm->start_brk) {
Ingo Molnare6e54942006-06-27 02:53:50 -0700256 name = "[heap]";
257 } else if (vma->vm_start <= mm->start_stack &&
258 vma->vm_end >= mm->start_stack) {
259 name = "[stack]";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 }
Ingo Molnare6e54942006-06-27 02:53:50 -0700261 } else {
262 name = "[vdso]";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 }
Ingo Molnare6e54942006-06-27 02:53:50 -0700264 }
265 if (name) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 pad_len_spaces(m, len);
Ingo Molnare6e54942006-06-27 02:53:50 -0700267 seq_puts(m, name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 }
269 }
270 seq_putc(m, '\n');
Joe Korty7c88db02008-10-16 15:27:09 +0400271}
272
273static int show_map(struct seq_file *m, void *v)
274{
275 struct vm_area_struct *vma = v;
276 struct proc_maps_private *priv = m->private;
277 struct task_struct *task = priv->task;
278
279 show_map_vma(m, vma);
Mauricio Line070ad42005-09-03 15:55:10 -0700280
Mauricio Line070ad42005-09-03 15:55:10 -0700281 if (m->count < m->size) /* vma is copied successfully */
Stephen Wilson31db58b2011-03-13 15:49:15 -0400282 m->version = (vma != get_gate_vma(task->mm))
283 ? vma->vm_start : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 return 0;
285}
286
Jan Engelhardt03a44822008-02-08 04:21:19 -0800287static const struct seq_operations proc_pid_maps_op = {
Matt Mackalla6198792008-02-04 22:29:03 -0800288 .start = m_start,
289 .next = m_next,
290 .stop = m_stop,
291 .show = show_map
292};
293
294static int maps_open(struct inode *inode, struct file *file)
295{
296 return do_maps_open(inode, file, &proc_pid_maps_op);
297}
298
299const struct file_operations proc_maps_operations = {
300 .open = maps_open,
301 .read = seq_read,
302 .llseek = seq_lseek,
303 .release = seq_release_private,
304};
305
306/*
307 * Proportional Set Size(PSS): my share of RSS.
308 *
309 * PSS of a process is the count of pages it has in memory, where each
310 * page is divided by the number of processes sharing it. So if a
311 * process has 1000 pages all to itself, and 1000 shared with one other
312 * process, its PSS will be 1500.
313 *
314 * To keep (accumulated) division errors low, we adopt a 64bit
315 * fixed-point pss counter to minimize division errors. So (pss >>
316 * PSS_SHIFT) would be the real byte count.
317 *
318 * A shift of 12 before division means (assuming 4K page size):
319 * - 1M 3-user-pages add up to 8KB errors;
320 * - supports mapcount up to 2^24, or 16M;
321 * - supports PSS up to 2^52 bytes, or 4PB.
322 */
323#define PSS_SHIFT 12
324
Matt Mackall1e883282008-02-04 22:29:07 -0800325#ifdef CONFIG_PROC_PAGE_MONITOR
Peter Zijlstra214e4712008-04-28 02:12:55 -0700326struct mem_size_stats {
Matt Mackalla6198792008-02-04 22:29:03 -0800327 struct vm_area_struct *vma;
328 unsigned long resident;
329 unsigned long shared_clean;
330 unsigned long shared_dirty;
331 unsigned long private_clean;
332 unsigned long private_dirty;
333 unsigned long referenced;
Nikanth Karthikesanb40d4f82010-10-27 15:34:10 -0700334 unsigned long anonymous;
Dave Hansen4031a212011-03-22 16:33:01 -0700335 unsigned long anonymous_thp;
Peter Zijlstra214e4712008-04-28 02:12:55 -0700336 unsigned long swap;
Matt Mackalla6198792008-02-04 22:29:03 -0800337 u64 pss;
338};
339
Dave Hansenae11c4d2011-03-22 16:32:58 -0700340
341static void smaps_pte_entry(pte_t ptent, unsigned long addr,
Dave Hansen3c9acc72011-03-22 16:32:59 -0700342 unsigned long ptent_size, struct mm_walk *walk)
Dave Hansenae11c4d2011-03-22 16:32:58 -0700343{
344 struct mem_size_stats *mss = walk->private;
345 struct vm_area_struct *vma = mss->vma;
346 struct page *page;
347 int mapcount;
348
349 if (is_swap_pte(ptent)) {
Dave Hansen3c9acc72011-03-22 16:32:59 -0700350 mss->swap += ptent_size;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700351 return;
352 }
353
354 if (!pte_present(ptent))
355 return;
356
357 page = vm_normal_page(vma, addr, ptent);
358 if (!page)
359 return;
360
361 if (PageAnon(page))
Dave Hansen3c9acc72011-03-22 16:32:59 -0700362 mss->anonymous += ptent_size;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700363
Dave Hansen3c9acc72011-03-22 16:32:59 -0700364 mss->resident += ptent_size;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700365 /* Accumulate the size in pages that have been accessed. */
366 if (pte_young(ptent) || PageReferenced(page))
Dave Hansen3c9acc72011-03-22 16:32:59 -0700367 mss->referenced += ptent_size;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700368 mapcount = page_mapcount(page);
369 if (mapcount >= 2) {
370 if (pte_dirty(ptent) || PageDirty(page))
Dave Hansen3c9acc72011-03-22 16:32:59 -0700371 mss->shared_dirty += ptent_size;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700372 else
Dave Hansen3c9acc72011-03-22 16:32:59 -0700373 mss->shared_clean += ptent_size;
374 mss->pss += (ptent_size << PSS_SHIFT) / mapcount;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700375 } else {
376 if (pte_dirty(ptent) || PageDirty(page))
Dave Hansen3c9acc72011-03-22 16:32:59 -0700377 mss->private_dirty += ptent_size;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700378 else
Dave Hansen3c9acc72011-03-22 16:32:59 -0700379 mss->private_clean += ptent_size;
380 mss->pss += (ptent_size << PSS_SHIFT);
Dave Hansenae11c4d2011-03-22 16:32:58 -0700381 }
382}
383
Matt Mackallb3ae5ac2008-02-04 22:29:01 -0800384static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
Dave Hansen21650092008-06-12 15:21:47 -0700385 struct mm_walk *walk)
Mauricio Line070ad42005-09-03 15:55:10 -0700386{
Dave Hansen21650092008-06-12 15:21:47 -0700387 struct mem_size_stats *mss = walk->private;
Matt Mackallb3ae5ac2008-02-04 22:29:01 -0800388 struct vm_area_struct *vma = mss->vma;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700389 pte_t *pte;
Hugh Dickins705e87c2005-10-29 18:16:27 -0700390 spinlock_t *ptl;
Mauricio Line070ad42005-09-03 15:55:10 -0700391
Dave Hansen22e057c2011-03-22 16:33:00 -0700392 spin_lock(&walk->mm->page_table_lock);
393 if (pmd_trans_huge(*pmd)) {
394 if (pmd_trans_splitting(*pmd)) {
395 spin_unlock(&walk->mm->page_table_lock);
396 wait_split_huge_page(vma->anon_vma, pmd);
397 } else {
398 smaps_pte_entry(*(pte_t *)pmd, addr,
399 HPAGE_PMD_SIZE, walk);
400 spin_unlock(&walk->mm->page_table_lock);
Dave Hansen4031a212011-03-22 16:33:01 -0700401 mss->anonymous_thp += HPAGE_PMD_SIZE;
Dave Hansen22e057c2011-03-22 16:33:00 -0700402 return 0;
403 }
404 } else {
405 spin_unlock(&walk->mm->page_table_lock);
406 }
407 /*
408 * The mmap_sem held all the way back in m_start() is what
409 * keeps khugepaged out of here and from collapsing things
410 * in here.
411 */
Hugh Dickins705e87c2005-10-29 18:16:27 -0700412 pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
Dave Hansenae11c4d2011-03-22 16:32:58 -0700413 for (; addr != end; pte++, addr += PAGE_SIZE)
Dave Hansen3c9acc72011-03-22 16:32:59 -0700414 smaps_pte_entry(*pte, addr, PAGE_SIZE, walk);
Hugh Dickins705e87c2005-10-29 18:16:27 -0700415 pte_unmap_unlock(pte - 1, ptl);
416 cond_resched();
Matt Mackallb3ae5ac2008-02-04 22:29:01 -0800417 return 0;
Mauricio Line070ad42005-09-03 15:55:10 -0700418}
419
Mauricio Line070ad42005-09-03 15:55:10 -0700420static int show_smap(struct seq_file *m, void *v)
421{
Joe Korty7c88db02008-10-16 15:27:09 +0400422 struct proc_maps_private *priv = m->private;
423 struct task_struct *task = priv->task;
Mauricio Line070ad42005-09-03 15:55:10 -0700424 struct vm_area_struct *vma = v;
Mauricio Line070ad42005-09-03 15:55:10 -0700425 struct mem_size_stats mss;
Dave Hansen21650092008-06-12 15:21:47 -0700426 struct mm_walk smaps_walk = {
427 .pmd_entry = smaps_pte_range,
428 .mm = vma->vm_mm,
429 .private = &mss,
430 };
Mauricio Line070ad42005-09-03 15:55:10 -0700431
432 memset(&mss, 0, sizeof mss);
Matt Mackallb3ae5ac2008-02-04 22:29:01 -0800433 mss.vma = vma;
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900434 /* mmap_sem is held in m_start */
Nick Piggin5ddfae12006-03-06 15:42:57 -0800435 if (vma->vm_mm && !is_vm_hugetlb_page(vma))
Dave Hansen21650092008-06-12 15:21:47 -0700436 walk_page_range(vma->vm_start, vma->vm_end, &smaps_walk);
Matt Mackall4752c362008-02-04 22:29:02 -0800437
Joe Korty7c88db02008-10-16 15:27:09 +0400438 show_map_vma(m, vma);
Matt Mackall4752c362008-02-04 22:29:02 -0800439
440 seq_printf(m,
441 "Size: %8lu kB\n"
442 "Rss: %8lu kB\n"
443 "Pss: %8lu kB\n"
444 "Shared_Clean: %8lu kB\n"
445 "Shared_Dirty: %8lu kB\n"
446 "Private_Clean: %8lu kB\n"
447 "Private_Dirty: %8lu kB\n"
Peter Zijlstra214e4712008-04-28 02:12:55 -0700448 "Referenced: %8lu kB\n"
Nikanth Karthikesanb40d4f82010-10-27 15:34:10 -0700449 "Anonymous: %8lu kB\n"
Dave Hansen4031a212011-03-22 16:33:01 -0700450 "AnonHugePages: %8lu kB\n"
Mel Gorman08fba692009-01-06 14:38:53 -0800451 "Swap: %8lu kB\n"
Mel Gorman33402892009-01-06 14:38:54 -0800452 "KernelPageSize: %8lu kB\n"
Nikanth Karthikesan2d905082011-01-13 15:45:53 -0800453 "MMUPageSize: %8lu kB\n"
454 "Locked: %8lu kB\n",
Matt Mackall4752c362008-02-04 22:29:02 -0800455 (vma->vm_end - vma->vm_start) >> 10,
456 mss.resident >> 10,
457 (unsigned long)(mss.pss >> (10 + PSS_SHIFT)),
458 mss.shared_clean >> 10,
459 mss.shared_dirty >> 10,
460 mss.private_clean >> 10,
461 mss.private_dirty >> 10,
Peter Zijlstra214e4712008-04-28 02:12:55 -0700462 mss.referenced >> 10,
Nikanth Karthikesanb40d4f82010-10-27 15:34:10 -0700463 mss.anonymous >> 10,
Dave Hansen4031a212011-03-22 16:33:01 -0700464 mss.anonymous_thp >> 10,
Mel Gorman08fba692009-01-06 14:38:53 -0800465 mss.swap >> 10,
Mel Gorman33402892009-01-06 14:38:54 -0800466 vma_kernel_pagesize(vma) >> 10,
Nikanth Karthikesan2d905082011-01-13 15:45:53 -0800467 vma_mmu_pagesize(vma) >> 10,
468 (vma->vm_flags & VM_LOCKED) ?
469 (unsigned long)(mss.pss >> (10 + PSS_SHIFT)) : 0);
Matt Mackall4752c362008-02-04 22:29:02 -0800470
Joe Korty7c88db02008-10-16 15:27:09 +0400471 if (m->count < m->size) /* vma is copied successfully */
Stephen Wilson31db58b2011-03-13 15:49:15 -0400472 m->version = (vma != get_gate_vma(task->mm))
473 ? vma->vm_start : 0;
Joe Korty7c88db02008-10-16 15:27:09 +0400474 return 0;
Mauricio Line070ad42005-09-03 15:55:10 -0700475}
476
Jan Engelhardt03a44822008-02-08 04:21:19 -0800477static const struct seq_operations proc_pid_smaps_op = {
Matt Mackalla6198792008-02-04 22:29:03 -0800478 .start = m_start,
479 .next = m_next,
480 .stop = m_stop,
481 .show = show_smap
482};
483
484static int smaps_open(struct inode *inode, struct file *file)
485{
486 return do_maps_open(inode, file, &proc_pid_smaps_op);
487}
488
489const struct file_operations proc_smaps_operations = {
490 .open = smaps_open,
491 .read = seq_read,
492 .llseek = seq_lseek,
493 .release = seq_release_private,
494};
495
496static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
Dave Hansen21650092008-06-12 15:21:47 -0700497 unsigned long end, struct mm_walk *walk)
Matt Mackalla6198792008-02-04 22:29:03 -0800498{
Dave Hansen21650092008-06-12 15:21:47 -0700499 struct vm_area_struct *vma = walk->private;
Matt Mackalla6198792008-02-04 22:29:03 -0800500 pte_t *pte, ptent;
501 spinlock_t *ptl;
502 struct page *page;
503
Dave Hansen03319322011-03-22 16:32:56 -0700504 split_huge_page_pmd(walk->mm, pmd);
505
Matt Mackalla6198792008-02-04 22:29:03 -0800506 pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
507 for (; addr != end; pte++, addr += PAGE_SIZE) {
508 ptent = *pte;
509 if (!pte_present(ptent))
510 continue;
511
512 page = vm_normal_page(vma, addr, ptent);
513 if (!page)
514 continue;
515
516 /* Clear accessed and referenced bits. */
517 ptep_test_and_clear_young(vma, addr, pte);
518 ClearPageReferenced(page);
519 }
520 pte_unmap_unlock(pte - 1, ptl);
521 cond_resched();
522 return 0;
523}
524
Moussa A. Ba398499d2009-09-21 17:02:29 -0700525#define CLEAR_REFS_ALL 1
526#define CLEAR_REFS_ANON 2
527#define CLEAR_REFS_MAPPED 3
528
Matt Mackallf248dcb2008-02-04 22:29:03 -0800529static ssize_t clear_refs_write(struct file *file, const char __user *buf,
530 size_t count, loff_t *ppos)
David Rientjesb813e932007-05-06 14:49:24 -0700531{
Matt Mackallf248dcb2008-02-04 22:29:03 -0800532 struct task_struct *task;
Vincent Lifb92a4b2009-09-22 16:45:36 -0700533 char buffer[PROC_NUMBUF];
Matt Mackallf248dcb2008-02-04 22:29:03 -0800534 struct mm_struct *mm;
David Rientjesb813e932007-05-06 14:49:24 -0700535 struct vm_area_struct *vma;
Vincent Lifb92a4b2009-09-22 16:45:36 -0700536 long type;
David Rientjesb813e932007-05-06 14:49:24 -0700537
Matt Mackallf248dcb2008-02-04 22:29:03 -0800538 memset(buffer, 0, sizeof(buffer));
539 if (count > sizeof(buffer) - 1)
540 count = sizeof(buffer) - 1;
541 if (copy_from_user(buffer, buf, count))
542 return -EFAULT;
Vincent Lifb92a4b2009-09-22 16:45:36 -0700543 if (strict_strtol(strstrip(buffer), 10, &type))
544 return -EINVAL;
Moussa A. Ba398499d2009-09-21 17:02:29 -0700545 if (type < CLEAR_REFS_ALL || type > CLEAR_REFS_MAPPED)
Matt Mackallf248dcb2008-02-04 22:29:03 -0800546 return -EINVAL;
Matt Mackallf248dcb2008-02-04 22:29:03 -0800547 task = get_proc_task(file->f_path.dentry->d_inode);
548 if (!task)
549 return -ESRCH;
550 mm = get_task_mm(task);
551 if (mm) {
Andrew Morton20cbc972008-07-05 12:29:05 -0700552 struct mm_walk clear_refs_walk = {
553 .pmd_entry = clear_refs_pte_range,
554 .mm = mm,
555 };
Matt Mackallf248dcb2008-02-04 22:29:03 -0800556 down_read(&mm->mmap_sem);
Dave Hansen21650092008-06-12 15:21:47 -0700557 for (vma = mm->mmap; vma; vma = vma->vm_next) {
558 clear_refs_walk.private = vma;
Moussa A. Ba398499d2009-09-21 17:02:29 -0700559 if (is_vm_hugetlb_page(vma))
560 continue;
561 /*
562 * Writing 1 to /proc/pid/clear_refs affects all pages.
563 *
564 * Writing 2 to /proc/pid/clear_refs only affects
565 * Anonymous pages.
566 *
567 * Writing 3 to /proc/pid/clear_refs only affects file
568 * mapped pages.
569 */
570 if (type == CLEAR_REFS_ANON && vma->vm_file)
571 continue;
572 if (type == CLEAR_REFS_MAPPED && !vma->vm_file)
573 continue;
574 walk_page_range(vma->vm_start, vma->vm_end,
575 &clear_refs_walk);
Dave Hansen21650092008-06-12 15:21:47 -0700576 }
Matt Mackallf248dcb2008-02-04 22:29:03 -0800577 flush_tlb_mm(mm);
578 up_read(&mm->mmap_sem);
579 mmput(mm);
580 }
581 put_task_struct(task);
Vincent Lifb92a4b2009-09-22 16:45:36 -0700582
583 return count;
David Rientjesb813e932007-05-06 14:49:24 -0700584}
585
Matt Mackallf248dcb2008-02-04 22:29:03 -0800586const struct file_operations proc_clear_refs_operations = {
587 .write = clear_refs_write,
Arnd Bergmann6038f372010-08-15 18:52:59 +0200588 .llseek = noop_llseek,
Matt Mackallf248dcb2008-02-04 22:29:03 -0800589};
590
Matt Mackall85863e42008-02-04 22:29:04 -0800591struct pagemapread {
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900592 int pos, len;
593 u64 *buffer;
Matt Mackall85863e42008-02-04 22:29:04 -0800594};
595
Hans Rosenfeldf16278c2008-03-21 18:46:59 -0500596#define PM_ENTRY_BYTES sizeof(u64)
597#define PM_STATUS_BITS 3
598#define PM_STATUS_OFFSET (64 - PM_STATUS_BITS)
599#define PM_STATUS_MASK (((1LL << PM_STATUS_BITS) - 1) << PM_STATUS_OFFSET)
600#define PM_STATUS(nr) (((nr) << PM_STATUS_OFFSET) & PM_STATUS_MASK)
601#define PM_PSHIFT_BITS 6
602#define PM_PSHIFT_OFFSET (PM_STATUS_OFFSET - PM_PSHIFT_BITS)
603#define PM_PSHIFT_MASK (((1LL << PM_PSHIFT_BITS) - 1) << PM_PSHIFT_OFFSET)
604#define PM_PSHIFT(x) (((u64) (x) << PM_PSHIFT_OFFSET) & PM_PSHIFT_MASK)
605#define PM_PFRAME_MASK ((1LL << PM_PSHIFT_OFFSET) - 1)
606#define PM_PFRAME(x) ((x) & PM_PFRAME_MASK)
607
608#define PM_PRESENT PM_STATUS(4LL)
609#define PM_SWAP PM_STATUS(2LL)
610#define PM_NOT_PRESENT PM_PSHIFT(PAGE_SHIFT)
Matt Mackall85863e42008-02-04 22:29:04 -0800611#define PM_END_OF_BUFFER 1
612
613static int add_to_pagemap(unsigned long addr, u64 pfn,
614 struct pagemapread *pm)
615{
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900616 pm->buffer[pm->pos++] = pfn;
617 if (pm->pos >= pm->len)
Thomas Tuttleaae86792008-06-05 22:46:31 -0700618 return PM_END_OF_BUFFER;
Matt Mackall85863e42008-02-04 22:29:04 -0800619 return 0;
620}
621
622static int pagemap_pte_hole(unsigned long start, unsigned long end,
Dave Hansen21650092008-06-12 15:21:47 -0700623 struct mm_walk *walk)
Matt Mackall85863e42008-02-04 22:29:04 -0800624{
Dave Hansen21650092008-06-12 15:21:47 -0700625 struct pagemapread *pm = walk->private;
Matt Mackall85863e42008-02-04 22:29:04 -0800626 unsigned long addr;
627 int err = 0;
628 for (addr = start; addr < end; addr += PAGE_SIZE) {
629 err = add_to_pagemap(addr, PM_NOT_PRESENT, pm);
630 if (err)
631 break;
632 }
633 return err;
634}
635
Adrian Bunk9d02dbc2008-04-28 02:12:11 -0700636static u64 swap_pte_to_pagemap_entry(pte_t pte)
Matt Mackall85863e42008-02-04 22:29:04 -0800637{
638 swp_entry_t e = pte_to_swp_entry(pte);
Hans Rosenfeldf16278c2008-03-21 18:46:59 -0500639 return swp_type(e) | (swp_offset(e) << MAX_SWAPFILES_SHIFT);
Matt Mackall85863e42008-02-04 22:29:04 -0800640}
641
Matt Mackall49c50342008-12-09 13:14:21 -0800642static u64 pte_to_pagemap_entry(pte_t pte)
Dave Hansenbcf80392008-06-12 15:21:48 -0700643{
Matt Mackall49c50342008-12-09 13:14:21 -0800644 u64 pme = 0;
Dave Hansenbcf80392008-06-12 15:21:48 -0700645 if (is_swap_pte(pte))
646 pme = PM_PFRAME(swap_pte_to_pagemap_entry(pte))
647 | PM_PSHIFT(PAGE_SHIFT) | PM_SWAP;
648 else if (pte_present(pte))
649 pme = PM_PFRAME(pte_pfn(pte))
650 | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT;
651 return pme;
652}
653
Matt Mackall85863e42008-02-04 22:29:04 -0800654static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
Dave Hansen21650092008-06-12 15:21:47 -0700655 struct mm_walk *walk)
Matt Mackall85863e42008-02-04 22:29:04 -0800656{
Dave Hansenbcf80392008-06-12 15:21:48 -0700657 struct vm_area_struct *vma;
Dave Hansen21650092008-06-12 15:21:47 -0700658 struct pagemapread *pm = walk->private;
Matt Mackall85863e42008-02-04 22:29:04 -0800659 pte_t *pte;
660 int err = 0;
661
Dave Hansen03319322011-03-22 16:32:56 -0700662 split_huge_page_pmd(walk->mm, pmd);
663
Dave Hansenbcf80392008-06-12 15:21:48 -0700664 /* find the first VMA at or above 'addr' */
665 vma = find_vma(walk->mm, addr);
Matt Mackall85863e42008-02-04 22:29:04 -0800666 for (; addr != end; addr += PAGE_SIZE) {
667 u64 pfn = PM_NOT_PRESENT;
Dave Hansenbcf80392008-06-12 15:21:48 -0700668
669 /* check to see if we've left 'vma' behind
670 * and need a new, higher one */
671 if (vma && (addr >= vma->vm_end))
672 vma = find_vma(walk->mm, addr);
673
674 /* check that 'vma' actually covers this address,
675 * and that it isn't a huge page vma */
676 if (vma && (vma->vm_start <= addr) &&
677 !is_vm_hugetlb_page(vma)) {
678 pte = pte_offset_map(pmd, addr);
679 pfn = pte_to_pagemap_entry(*pte);
680 /* unmap before userspace copy */
681 pte_unmap(pte);
682 }
Matt Mackall85863e42008-02-04 22:29:04 -0800683 err = add_to_pagemap(addr, pfn, pm);
684 if (err)
685 return err;
686 }
687
688 cond_resched();
689
690 return err;
691}
692
Naoya Horiguchi1a5cb812010-05-24 14:32:12 -0700693#ifdef CONFIG_HUGETLB_PAGE
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800694static u64 huge_pte_to_pagemap_entry(pte_t pte, int offset)
695{
696 u64 pme = 0;
697 if (pte_present(pte))
698 pme = PM_PFRAME(pte_pfn(pte) + offset)
699 | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT;
700 return pme;
701}
702
Naoya Horiguchi116354d2010-04-06 14:35:04 -0700703/* This function walks within one hugetlb entry in the single call */
704static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask,
705 unsigned long addr, unsigned long end,
706 struct mm_walk *walk)
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800707{
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800708 struct pagemapread *pm = walk->private;
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800709 int err = 0;
Naoya Horiguchi116354d2010-04-06 14:35:04 -0700710 u64 pfn;
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800711
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800712 for (; addr != end; addr += PAGE_SIZE) {
Naoya Horiguchi116354d2010-04-06 14:35:04 -0700713 int offset = (addr & ~hmask) >> PAGE_SHIFT;
714 pfn = huge_pte_to_pagemap_entry(*pte, offset);
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800715 err = add_to_pagemap(addr, pfn, pm);
716 if (err)
717 return err;
718 }
719
720 cond_resched();
721
722 return err;
723}
Naoya Horiguchi1a5cb812010-05-24 14:32:12 -0700724#endif /* HUGETLB_PAGE */
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800725
Matt Mackall85863e42008-02-04 22:29:04 -0800726/*
727 * /proc/pid/pagemap - an array mapping virtual pages to pfns
728 *
Hans Rosenfeldf16278c2008-03-21 18:46:59 -0500729 * For each page in the address space, this file contains one 64-bit entry
730 * consisting of the following:
731 *
732 * Bits 0-55 page frame number (PFN) if present
733 * Bits 0-4 swap type if swapped
734 * Bits 5-55 swap offset if swapped
735 * Bits 55-60 page shift (page size = 1<<page shift)
736 * Bit 61 reserved for future use
737 * Bit 62 page swapped
738 * Bit 63 page present
739 *
740 * If the page is not present but in swap, then the PFN contains an
741 * encoding of the swap file number and the page's offset into the
742 * swap. Unmapped pages return a null PFN. This allows determining
Matt Mackall85863e42008-02-04 22:29:04 -0800743 * precisely which pages are mapped (or in swap) and comparing mapped
744 * pages between processes.
745 *
746 * Efficient users of this interface will use /proc/pid/maps to
747 * determine which areas of memory are actually mapped and llseek to
748 * skip over unmapped regions.
749 */
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900750#define PAGEMAP_WALK_SIZE (PMD_SIZE)
Naoya Horiguchiea251c12010-11-24 12:57:13 -0800751#define PAGEMAP_WALK_MASK (PMD_MASK)
Matt Mackall85863e42008-02-04 22:29:04 -0800752static ssize_t pagemap_read(struct file *file, char __user *buf,
753 size_t count, loff_t *ppos)
754{
755 struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
Matt Mackall85863e42008-02-04 22:29:04 -0800756 struct mm_struct *mm;
757 struct pagemapread pm;
Matt Mackall85863e42008-02-04 22:29:04 -0800758 int ret = -ESRCH;
Alexey Dobriyanee1e6ab2008-07-21 14:21:36 -0700759 struct mm_walk pagemap_walk = {};
Andrew Morton5d7e0d22008-07-05 01:02:01 -0700760 unsigned long src;
761 unsigned long svpfn;
762 unsigned long start_vaddr;
763 unsigned long end_vaddr;
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900764 int copied = 0;
Matt Mackall85863e42008-02-04 22:29:04 -0800765
766 if (!task)
767 goto out;
768
Al Viroca6b0bf2011-02-15 22:04:37 -0500769 mm = mm_for_maps(task);
Al Viroec6fd8a2011-02-15 22:22:54 -0500770 ret = PTR_ERR(mm);
771 if (!mm || IS_ERR(mm))
Marcelo Tosattifb393802008-03-13 12:32:35 -0700772 goto out_task;
Matt Mackall85863e42008-02-04 22:29:04 -0800773
774 ret = -EINVAL;
775 /* file position must be aligned */
Thomas Tuttleaae86792008-06-05 22:46:31 -0700776 if ((*ppos % PM_ENTRY_BYTES) || (count % PM_ENTRY_BYTES))
Marcelo Tosattifb393802008-03-13 12:32:35 -0700777 goto out_task;
Matt Mackall85863e42008-02-04 22:29:04 -0800778
779 ret = 0;
Vitaly Mayatskikh08161782009-04-30 15:08:18 -0700780
781 if (!count)
782 goto out_task;
783
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900784 pm.len = PM_ENTRY_BYTES * (PAGEMAP_WALK_SIZE >> PAGE_SHIFT);
785 pm.buffer = kmalloc(pm.len, GFP_TEMPORARY);
Andrew Morton5d7e0d22008-07-05 01:02:01 -0700786 ret = -ENOMEM;
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900787 if (!pm.buffer)
Marcelo Tosattifb393802008-03-13 12:32:35 -0700788 goto out_mm;
Matt Mackall85863e42008-02-04 22:29:04 -0800789
Andrew Morton5d7e0d22008-07-05 01:02:01 -0700790 pagemap_walk.pmd_entry = pagemap_pte_range;
791 pagemap_walk.pte_hole = pagemap_pte_hole;
Naoya Horiguchi1a5cb812010-05-24 14:32:12 -0700792#ifdef CONFIG_HUGETLB_PAGE
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800793 pagemap_walk.hugetlb_entry = pagemap_hugetlb_range;
Naoya Horiguchi1a5cb812010-05-24 14:32:12 -0700794#endif
Andrew Morton5d7e0d22008-07-05 01:02:01 -0700795 pagemap_walk.mm = mm;
796 pagemap_walk.private = &pm;
Matt Mackall85863e42008-02-04 22:29:04 -0800797
Andrew Morton5d7e0d22008-07-05 01:02:01 -0700798 src = *ppos;
799 svpfn = src / PM_ENTRY_BYTES;
800 start_vaddr = svpfn << PAGE_SHIFT;
801 end_vaddr = TASK_SIZE_OF(task);
Matt Mackall85863e42008-02-04 22:29:04 -0800802
Andrew Morton5d7e0d22008-07-05 01:02:01 -0700803 /* watch out for wraparound */
804 if (svpfn > TASK_SIZE_OF(task) >> PAGE_SHIFT)
805 start_vaddr = end_vaddr;
806
807 /*
808 * The odds are that this will stop walking way
809 * before end_vaddr, because the length of the
810 * user buffer is tracked in "pm", and the walk
811 * will stop when we hit the end of the buffer.
812 */
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900813 ret = 0;
814 while (count && (start_vaddr < end_vaddr)) {
815 int len;
816 unsigned long end;
Matt Mackall85863e42008-02-04 22:29:04 -0800817
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900818 pm.pos = 0;
Naoya Horiguchiea251c12010-11-24 12:57:13 -0800819 end = (start_vaddr + PAGEMAP_WALK_SIZE) & PAGEMAP_WALK_MASK;
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900820 /* overflow ? */
821 if (end < start_vaddr || end > end_vaddr)
822 end = end_vaddr;
823 down_read(&mm->mmap_sem);
824 ret = walk_page_range(start_vaddr, end, &pagemap_walk);
825 up_read(&mm->mmap_sem);
826 start_vaddr = end;
827
828 len = min(count, PM_ENTRY_BYTES * pm.pos);
Dan Carpenter309361e02010-04-06 13:45:39 +0300829 if (copy_to_user(buf, pm.buffer, len)) {
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900830 ret = -EFAULT;
831 goto out_free;
832 }
833 copied += len;
834 buf += len;
835 count -= len;
Matt Mackall85863e42008-02-04 22:29:04 -0800836 }
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900837 *ppos += copied;
838 if (!ret || ret == PM_END_OF_BUFFER)
839 ret = copied;
840
Matt Mackall85863e42008-02-04 22:29:04 -0800841out_free:
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900842 kfree(pm.buffer);
Marcelo Tosattifb393802008-03-13 12:32:35 -0700843out_mm:
844 mmput(mm);
Matt Mackall85863e42008-02-04 22:29:04 -0800845out_task:
846 put_task_struct(task);
847out:
848 return ret;
849}
850
851const struct file_operations proc_pagemap_operations = {
852 .llseek = mem_lseek, /* borrow this */
853 .read = pagemap_read,
854};
Matt Mackall1e883282008-02-04 22:29:07 -0800855#endif /* CONFIG_PROC_PAGE_MONITOR */
Matt Mackall85863e42008-02-04 22:29:04 -0800856
Christoph Lameter6e21c8f2005-09-03 15:54:45 -0700857#ifdef CONFIG_NUMA
Christoph Lameter1a75a6c2006-01-08 01:01:02 -0800858extern int show_numa_map(struct seq_file *m, void *v);
Christoph Lameter6e21c8f2005-09-03 15:54:45 -0700859
Jan Engelhardt03a44822008-02-08 04:21:19 -0800860static const struct seq_operations proc_pid_numa_maps_op = {
Christoph Lameter1a75a6c2006-01-08 01:01:02 -0800861 .start = m_start,
862 .next = m_next,
863 .stop = m_stop,
Alexey Dobriyan3bbfe052008-10-10 03:27:16 +0400864 .show = show_numa_map,
Christoph Lameter6e21c8f2005-09-03 15:54:45 -0700865};
Eric W. Biederman662795d2006-06-26 00:25:48 -0700866
867static int numa_maps_open(struct inode *inode, struct file *file)
868{
869 return do_maps_open(inode, file, &proc_pid_numa_maps_op);
870}
871
Arjan van de Ven00977a52007-02-12 00:55:34 -0800872const struct file_operations proc_numa_maps_operations = {
Eric W. Biederman662795d2006-06-26 00:25:48 -0700873 .open = numa_maps_open,
874 .read = seq_read,
875 .llseek = seq_lseek,
Eric W. Biederman99f89552006-06-26 00:25:55 -0700876 .release = seq_release_private,
Eric W. Biederman662795d2006-06-26 00:25:48 -0700877};
Christoph Lameter6e21c8f2005-09-03 15:54:45 -0700878#endif