2 #include <linux/vmacache.h>
3 #include <linux/hugetlb.h>
4 #include <linux/huge_mm.h>
5 #include <linux/mount.h>
6 #include <linux/seq_file.h>
7 #include <linux/highmem.h>
8 #include <linux/ptrace.h>
9 #include <linux/slab.h>
10 #include <linux/pagemap.h>
11 #include <linux/mempolicy.h>
12 #include <linux/rmap.h>
13 #include <linux/swap.h>
14 #include <linux/sched/mm.h>
15 #include <linux/swapops.h>
16 #include <linux/mmu_notifier.h>
17 #include <linux/page_idle.h>
18 #include <linux/shmem_fs.h>
19 #include <linux/uaccess.h>
23 #include <asm/tlbflush.h>
26 void task_mem(struct seq_file *m, struct mm_struct *mm)
28 unsigned long text, lib, swap, ptes, pmds, anon, file, shmem;
29 unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss;
31 anon = get_mm_counter(mm, MM_ANONPAGES);
32 file = get_mm_counter(mm, MM_FILEPAGES);
33 shmem = get_mm_counter(mm, MM_SHMEMPAGES);
36 * Note: to minimize their overhead, mm maintains hiwater_vm and
37 * hiwater_rss only when about to *lower* total_vm or rss. Any
38 * collector of these hiwater stats must therefore get total_vm
39 * and rss too, which will usually be the higher. Barriers? not
40 * worth the effort, such snapshots can always be inconsistent.
42 hiwater_vm = total_vm = mm->total_vm;
43 if (hiwater_vm < mm->hiwater_vm)
44 hiwater_vm = mm->hiwater_vm;
45 hiwater_rss = total_rss = anon + file + shmem;
46 if (hiwater_rss < mm->hiwater_rss)
47 hiwater_rss = mm->hiwater_rss;
49 text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10;
50 lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text;
51 swap = get_mm_counter(mm, MM_SWAPENTS);
52 ptes = PTRS_PER_PTE * sizeof(pte_t) * atomic_long_read(&mm->nr_ptes);
53 pmds = PTRS_PER_PMD * sizeof(pmd_t) * mm_nr_pmds(mm);
63 "RssShmem:\t%8lu kB\n"
71 hiwater_vm << (PAGE_SHIFT-10),
72 total_vm << (PAGE_SHIFT-10),
73 mm->locked_vm << (PAGE_SHIFT-10),
74 mm->pinned_vm << (PAGE_SHIFT-10),
75 hiwater_rss << (PAGE_SHIFT-10),
76 total_rss << (PAGE_SHIFT-10),
77 anon << (PAGE_SHIFT-10),
78 file << (PAGE_SHIFT-10),
79 shmem << (PAGE_SHIFT-10),
80 mm->data_vm << (PAGE_SHIFT-10),
81 mm->stack_vm << (PAGE_SHIFT-10), text, lib,
84 swap << (PAGE_SHIFT-10));
85 hugetlb_report_usage(m, mm);
88 unsigned long task_vsize(struct mm_struct *mm)
90 return PAGE_SIZE * mm->total_vm;
93 unsigned long task_statm(struct mm_struct *mm,
94 unsigned long *shared, unsigned long *text,
95 unsigned long *data, unsigned long *resident)
97 *shared = get_mm_counter(mm, MM_FILEPAGES) +
98 get_mm_counter(mm, MM_SHMEMPAGES);
99 *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
101 *data = mm->data_vm + mm->stack_vm;
102 *resident = *shared + get_mm_counter(mm, MM_ANONPAGES);
108 * Save get_task_policy() for show_numa_map().
110 static void hold_task_mempolicy(struct proc_maps_private *priv)
112 struct task_struct *task = priv->task;
115 priv->task_mempolicy = get_task_policy(task);
116 mpol_get(priv->task_mempolicy);
119 static void release_task_mempolicy(struct proc_maps_private *priv)
121 mpol_put(priv->task_mempolicy);
124 static void hold_task_mempolicy(struct proc_maps_private *priv)
127 static void release_task_mempolicy(struct proc_maps_private *priv)
132 static void vma_stop(struct proc_maps_private *priv)
134 struct mm_struct *mm = priv->mm;
136 release_task_mempolicy(priv);
137 up_read(&mm->mmap_sem);
141 static struct vm_area_struct *
142 m_next_vma(struct proc_maps_private *priv, struct vm_area_struct *vma)
144 if (vma == priv->tail_vma)
146 return vma->vm_next ?: priv->tail_vma;
149 static void m_cache_vma(struct seq_file *m, struct vm_area_struct *vma)
151 if (m->count < m->size) /* vma is copied successfully */
152 m->version = m_next_vma(m->private, vma) ? vma->vm_end : -1UL;
155 static void *m_start(struct seq_file *m, loff_t *ppos)
157 struct proc_maps_private *priv = m->private;
158 unsigned long last_addr = m->version;
159 struct mm_struct *mm;
160 struct vm_area_struct *vma;
161 unsigned int pos = *ppos;
163 /* See m_cache_vma(). Zero at the start or after lseek. */
164 if (last_addr == -1UL)
167 priv->task = get_proc_task(priv->inode);
169 return ERR_PTR(-ESRCH);
172 if (!mm || !mmget_not_zero(mm))
175 down_read(&mm->mmap_sem);
176 hold_task_mempolicy(priv);
177 priv->tail_vma = get_gate_vma(mm);
180 vma = find_vma(mm, last_addr - 1);
181 if (vma && vma->vm_start <= last_addr)
182 vma = m_next_vma(priv, vma);
188 if (pos < mm->map_count) {
189 for (vma = mm->mmap; pos; pos--) {
190 m->version = vma->vm_start;
196 /* we do not bother to update m->version in this case */
197 if (pos == mm->map_count && priv->tail_vma)
198 return priv->tail_vma;
204 static void *m_next(struct seq_file *m, void *v, loff_t *pos)
206 struct proc_maps_private *priv = m->private;
207 struct vm_area_struct *next;
210 next = m_next_vma(priv, v);
216 static void m_stop(struct seq_file *m, void *v)
218 struct proc_maps_private *priv = m->private;
220 if (!IS_ERR_OR_NULL(v))
223 put_task_struct(priv->task);
228 static int proc_maps_open(struct inode *inode, struct file *file,
229 const struct seq_operations *ops, int psize)
231 struct proc_maps_private *priv = __seq_open_private(file, ops, psize);
237 priv->mm = proc_mem_open(inode, PTRACE_MODE_READ);
238 if (IS_ERR(priv->mm)) {
239 int err = PTR_ERR(priv->mm);
241 seq_release_private(inode, file);
248 static int proc_map_release(struct inode *inode, struct file *file)
250 struct seq_file *seq = file->private_data;
251 struct proc_maps_private *priv = seq->private;
257 return seq_release_private(inode, file);
260 static int do_maps_open(struct inode *inode, struct file *file,
261 const struct seq_operations *ops)
263 return proc_maps_open(inode, file, ops,
264 sizeof(struct proc_maps_private));
268 * Indicate if the VMA is a stack for the given task; for
269 * /proc/PID/maps that is the stack of the main task.
271 static int is_stack(struct vm_area_struct *vma)
274 * We make no effort to guess what a given thread considers to be
275 * its "stack". It's not even well-defined for programs written
278 return vma->vm_start <= vma->vm_mm->start_stack &&
279 vma->vm_end >= vma->vm_mm->start_stack;
282 static void show_vma_header_prefix(struct seq_file *m,
283 unsigned long start, unsigned long end,
284 vm_flags_t flags, unsigned long long pgoff,
285 dev_t dev, unsigned long ino)
287 seq_setwidth(m, 25 + sizeof(void *) * 6 - 1);
288 seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu ",
291 flags & VM_READ ? 'r' : '-',
292 flags & VM_WRITE ? 'w' : '-',
293 flags & VM_EXEC ? 'x' : '-',
294 flags & VM_MAYSHARE ? 's' : 'p',
296 MAJOR(dev), MINOR(dev), ino);
300 show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid)
302 struct mm_struct *mm = vma->vm_mm;
303 struct file *file = vma->vm_file;
304 vm_flags_t flags = vma->vm_flags;
305 unsigned long ino = 0;
306 unsigned long long pgoff = 0;
307 unsigned long start, end;
309 const char *name = NULL;
312 struct inode *inode = file_inode(vma->vm_file);
313 dev = inode->i_sb->s_dev;
315 pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT;
318 start = vma->vm_start;
320 show_vma_header_prefix(m, start, end, flags, pgoff, dev, ino);
323 * Print the dentry name for named mappings, and a
324 * special [heap] marker for the heap:
328 seq_file_path(m, file, "\n");
332 if (vma->vm_ops && vma->vm_ops->name) {
333 name = vma->vm_ops->name(vma);
338 name = arch_vma_name(vma);
345 if (vma->vm_start <= mm->brk &&
346 vma->vm_end >= mm->start_brk) {
363 static int show_map(struct seq_file *m, void *v, int is_pid)
365 show_map_vma(m, v, is_pid);
370 static int show_pid_map(struct seq_file *m, void *v)
372 return show_map(m, v, 1);
375 static int show_tid_map(struct seq_file *m, void *v)
377 return show_map(m, v, 0);
380 static const struct seq_operations proc_pid_maps_op = {
387 static const struct seq_operations proc_tid_maps_op = {
394 static int pid_maps_open(struct inode *inode, struct file *file)
396 return do_maps_open(inode, file, &proc_pid_maps_op);
399 static int tid_maps_open(struct inode *inode, struct file *file)
401 return do_maps_open(inode, file, &proc_tid_maps_op);
404 const struct file_operations proc_pid_maps_operations = {
405 .open = pid_maps_open,
408 .release = proc_map_release,
411 const struct file_operations proc_tid_maps_operations = {
412 .open = tid_maps_open,
415 .release = proc_map_release,
419 * Proportional Set Size(PSS): my share of RSS.
421 * PSS of a process is the count of pages it has in memory, where each
422 * page is divided by the number of processes sharing it. So if a
423 * process has 1000 pages all to itself, and 1000 shared with one other
424 * process, its PSS will be 1500.
426 * To keep (accumulated) division errors low, we adopt a 64bit
427 * fixed-point pss counter to minimize division errors. So (pss >>
428 * PSS_SHIFT) would be the real byte count.
430 * A shift of 12 before division means (assuming 4K page size):
431 * - 1M 3-user-pages add up to 8KB errors;
432 * - supports mapcount up to 2^24, or 16M;
433 * - supports PSS up to 2^52 bytes, or 4PB.
437 #ifdef CONFIG_PROC_PAGE_MONITOR
438 struct mem_size_stats {
440 unsigned long resident;
441 unsigned long shared_clean;
442 unsigned long shared_dirty;
443 unsigned long private_clean;
444 unsigned long private_dirty;
445 unsigned long referenced;
446 unsigned long anonymous;
447 unsigned long lazyfree;
448 unsigned long anonymous_thp;
449 unsigned long shmem_thp;
451 unsigned long shared_hugetlb;
452 unsigned long private_hugetlb;
453 unsigned long first_vma_start;
457 bool check_shmem_swap;
460 static void smaps_account(struct mem_size_stats *mss, struct page *page,
461 bool compound, bool young, bool dirty)
463 int i, nr = compound ? 1 << compound_order(page) : 1;
464 unsigned long size = nr * PAGE_SIZE;
466 if (PageAnon(page)) {
467 mss->anonymous += size;
468 if (!PageSwapBacked(page) && !dirty && !PageDirty(page))
469 mss->lazyfree += size;
472 mss->resident += size;
473 /* Accumulate the size in pages that have been accessed. */
474 if (young || page_is_young(page) || PageReferenced(page))
475 mss->referenced += size;
478 * page_count(page) == 1 guarantees the page is mapped exactly once.
479 * If any subpage of the compound page mapped with PTE it would elevate
482 if (page_count(page) == 1) {
483 if (dirty || PageDirty(page))
484 mss->private_dirty += size;
486 mss->private_clean += size;
487 mss->pss += (u64)size << PSS_SHIFT;
491 for (i = 0; i < nr; i++, page++) {
492 int mapcount = page_mapcount(page);
495 if (dirty || PageDirty(page))
496 mss->shared_dirty += PAGE_SIZE;
498 mss->shared_clean += PAGE_SIZE;
499 mss->pss += (PAGE_SIZE << PSS_SHIFT) / mapcount;
501 if (dirty || PageDirty(page))
502 mss->private_dirty += PAGE_SIZE;
504 mss->private_clean += PAGE_SIZE;
505 mss->pss += PAGE_SIZE << PSS_SHIFT;
511 static int smaps_pte_hole(unsigned long addr, unsigned long end,
512 struct mm_walk *walk)
514 struct mem_size_stats *mss = walk->private;
516 mss->swap += shmem_partial_swap_usage(
517 walk->vma->vm_file->f_mapping, addr, end);
523 static void smaps_pte_entry(pte_t *pte, unsigned long addr,
524 struct mm_walk *walk)
526 struct mem_size_stats *mss = walk->private;
527 struct vm_area_struct *vma = walk->vma;
528 struct page *page = NULL;
530 if (pte_present(*pte)) {
531 page = vm_normal_page(vma, addr, *pte);
532 } else if (is_swap_pte(*pte)) {
533 swp_entry_t swpent = pte_to_swp_entry(*pte);
535 if (!non_swap_entry(swpent)) {
538 mss->swap += PAGE_SIZE;
539 mapcount = swp_swapcount(swpent);
541 u64 pss_delta = (u64)PAGE_SIZE << PSS_SHIFT;
543 do_div(pss_delta, mapcount);
544 mss->swap_pss += pss_delta;
546 mss->swap_pss += (u64)PAGE_SIZE << PSS_SHIFT;
548 } else if (is_migration_entry(swpent))
549 page = migration_entry_to_page(swpent);
550 else if (is_device_private_entry(swpent))
551 page = device_private_entry_to_page(swpent);
552 } else if (unlikely(IS_ENABLED(CONFIG_SHMEM) && mss->check_shmem_swap
553 && pte_none(*pte))) {
554 page = find_get_entry(vma->vm_file->f_mapping,
555 linear_page_index(vma, addr));
559 if (radix_tree_exceptional_entry(page))
560 mss->swap += PAGE_SIZE;
570 smaps_account(mss, page, false, pte_young(*pte), pte_dirty(*pte));
573 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
574 static void smaps_pmd_entry(pmd_t *pmd, unsigned long addr,
575 struct mm_walk *walk)
577 struct mem_size_stats *mss = walk->private;
578 struct vm_area_struct *vma = walk->vma;
581 /* FOLL_DUMP will return -EFAULT on huge zero page */
582 page = follow_trans_huge_pmd(vma, addr, pmd, FOLL_DUMP);
583 if (IS_ERR_OR_NULL(page))
586 mss->anonymous_thp += HPAGE_PMD_SIZE;
587 else if (PageSwapBacked(page))
588 mss->shmem_thp += HPAGE_PMD_SIZE;
589 else if (is_zone_device_page(page))
592 VM_BUG_ON_PAGE(1, page);
593 smaps_account(mss, page, true, pmd_young(*pmd), pmd_dirty(*pmd));
596 static void smaps_pmd_entry(pmd_t *pmd, unsigned long addr,
597 struct mm_walk *walk)
602 static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
603 struct mm_walk *walk)
605 struct vm_area_struct *vma = walk->vma;
609 ptl = pmd_trans_huge_lock(pmd, vma);
611 if (pmd_present(*pmd))
612 smaps_pmd_entry(pmd, addr, walk);
617 if (pmd_trans_unstable(pmd))
620 * The mmap_sem held all the way back in m_start() is what
621 * keeps khugepaged out of here and from collapsing things
624 pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
625 for (; addr != end; pte++, addr += PAGE_SIZE)
626 smaps_pte_entry(pte, addr, walk);
627 pte_unmap_unlock(pte - 1, ptl);
633 static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma)
636 * Don't forget to update Documentation/ on changes.
638 static const char mnemonics[BITS_PER_LONG][2] = {
640 * In case if we meet a flag we don't know about.
642 [0 ... (BITS_PER_LONG-1)] = "??",
644 [ilog2(VM_READ)] = "rd",
645 [ilog2(VM_WRITE)] = "wr",
646 [ilog2(VM_EXEC)] = "ex",
647 [ilog2(VM_SHARED)] = "sh",
648 [ilog2(VM_MAYREAD)] = "mr",
649 [ilog2(VM_MAYWRITE)] = "mw",
650 [ilog2(VM_MAYEXEC)] = "me",
651 [ilog2(VM_MAYSHARE)] = "ms",
652 [ilog2(VM_GROWSDOWN)] = "gd",
653 [ilog2(VM_PFNMAP)] = "pf",
654 [ilog2(VM_DENYWRITE)] = "dw",
655 #ifdef CONFIG_X86_INTEL_MPX
656 [ilog2(VM_MPX)] = "mp",
658 [ilog2(VM_LOCKED)] = "lo",
659 [ilog2(VM_IO)] = "io",
660 [ilog2(VM_SEQ_READ)] = "sr",
661 [ilog2(VM_RAND_READ)] = "rr",
662 [ilog2(VM_DONTCOPY)] = "dc",
663 [ilog2(VM_DONTEXPAND)] = "de",
664 [ilog2(VM_ACCOUNT)] = "ac",
665 [ilog2(VM_NORESERVE)] = "nr",
666 [ilog2(VM_HUGETLB)] = "ht",
667 [ilog2(VM_ARCH_1)] = "ar",
668 [ilog2(VM_WIPEONFORK)] = "wf",
669 [ilog2(VM_DONTDUMP)] = "dd",
670 #ifdef CONFIG_MEM_SOFT_DIRTY
671 [ilog2(VM_SOFTDIRTY)] = "sd",
673 [ilog2(VM_MIXEDMAP)] = "mm",
674 [ilog2(VM_HUGEPAGE)] = "hg",
675 [ilog2(VM_NOHUGEPAGE)] = "nh",
676 [ilog2(VM_MERGEABLE)] = "mg",
677 [ilog2(VM_UFFD_MISSING)]= "um",
678 [ilog2(VM_UFFD_WP)] = "uw",
679 #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
680 /* These come out via ProtectionKey: */
681 [ilog2(VM_PKEY_BIT0)] = "",
682 [ilog2(VM_PKEY_BIT1)] = "",
683 [ilog2(VM_PKEY_BIT2)] = "",
684 [ilog2(VM_PKEY_BIT3)] = "",
689 seq_puts(m, "VmFlags: ");
690 for (i = 0; i < BITS_PER_LONG; i++) {
691 if (!mnemonics[i][0])
693 if (vma->vm_flags & (1UL << i)) {
694 seq_printf(m, "%c%c ",
695 mnemonics[i][0], mnemonics[i][1]);
701 #ifdef CONFIG_HUGETLB_PAGE
702 static int smaps_hugetlb_range(pte_t *pte, unsigned long hmask,
703 unsigned long addr, unsigned long end,
704 struct mm_walk *walk)
706 struct mem_size_stats *mss = walk->private;
707 struct vm_area_struct *vma = walk->vma;
708 struct page *page = NULL;
710 if (pte_present(*pte)) {
711 page = vm_normal_page(vma, addr, *pte);
712 } else if (is_swap_pte(*pte)) {
713 swp_entry_t swpent = pte_to_swp_entry(*pte);
715 if (is_migration_entry(swpent))
716 page = migration_entry_to_page(swpent);
717 else if (is_device_private_entry(swpent))
718 page = device_private_entry_to_page(swpent);
721 int mapcount = page_mapcount(page);
724 mss->shared_hugetlb += huge_page_size(hstate_vma(vma));
726 mss->private_hugetlb += huge_page_size(hstate_vma(vma));
730 #endif /* HUGETLB_PAGE */
732 void __weak arch_show_smap(struct seq_file *m, struct vm_area_struct *vma)
736 static int show_smap(struct seq_file *m, void *v, int is_pid)
738 struct proc_maps_private *priv = m->private;
739 struct vm_area_struct *vma = v;
740 struct mem_size_stats mss_stack;
741 struct mem_size_stats *mss;
742 struct mm_walk smaps_walk = {
743 .pmd_entry = smaps_pte_range,
744 #ifdef CONFIG_HUGETLB_PAGE
745 .hugetlb_entry = smaps_hugetlb_range,
757 mss->first_vma_start = vma->vm_start;
760 last_vma = !m_next_vma(priv, vma);
763 memset(&mss_stack, 0, sizeof(mss_stack));
767 smaps_walk.private = mss;
770 if (vma->vm_file && shmem_mapping(vma->vm_file->f_mapping)) {
772 * For shared or readonly shmem mappings we know that all
773 * swapped out pages belong to the shmem object, and we can
774 * obtain the swap value much more efficiently. For private
775 * writable mappings, we might have COW pages that are
776 * not affected by the parent swapped out pages of the shmem
777 * object, so we have to distinguish them during the page walk.
778 * Unless we know that the shmem object (or the part mapped by
779 * our VMA) has no swapped out pages at all.
781 unsigned long shmem_swapped = shmem_swap_usage(vma);
783 if (!shmem_swapped || (vma->vm_flags & VM_SHARED) ||
784 !(vma->vm_flags & VM_WRITE)) {
785 mss->swap = shmem_swapped;
787 mss->check_shmem_swap = true;
788 smaps_walk.pte_hole = smaps_pte_hole;
793 /* mmap_sem is held in m_start */
794 walk_page_vma(vma, &smaps_walk);
795 if (vma->vm_flags & VM_LOCKED)
796 mss->pss_locked += mss->pss;
799 show_map_vma(m, vma, is_pid);
800 } else if (last_vma) {
801 show_vma_header_prefix(
802 m, mss->first_vma_start, vma->vm_end, 0, 0, 0, 0);
804 seq_puts(m, "[rollup]\n");
812 "KernelPageSize: %8lu kB\n"
813 "MMUPageSize: %8lu kB\n",
814 (vma->vm_end - vma->vm_start) >> 10,
815 vma_kernel_pagesize(vma) >> 10,
816 vma_mmu_pagesize(vma) >> 10);
819 if (!rollup_mode || last_vma)
823 "Shared_Clean: %8lu kB\n"
824 "Shared_Dirty: %8lu kB\n"
825 "Private_Clean: %8lu kB\n"
826 "Private_Dirty: %8lu kB\n"
827 "Referenced: %8lu kB\n"
828 "Anonymous: %8lu kB\n"
829 "LazyFree: %8lu kB\n"
830 "AnonHugePages: %8lu kB\n"
831 "ShmemPmdMapped: %8lu kB\n"
832 "Shared_Hugetlb: %8lu kB\n"
833 "Private_Hugetlb: %7lu kB\n"
838 (unsigned long)(mss->pss >> (10 + PSS_SHIFT)),
839 mss->shared_clean >> 10,
840 mss->shared_dirty >> 10,
841 mss->private_clean >> 10,
842 mss->private_dirty >> 10,
843 mss->referenced >> 10,
844 mss->anonymous >> 10,
846 mss->anonymous_thp >> 10,
847 mss->shmem_thp >> 10,
848 mss->shared_hugetlb >> 10,
849 mss->private_hugetlb >> 10,
851 (unsigned long)(mss->swap_pss >> (10 + PSS_SHIFT)),
852 (unsigned long)(mss->pss >> (10 + PSS_SHIFT)));
855 arch_show_smap(m, vma);
856 show_smap_vma_flags(m, vma);
862 static int show_pid_smap(struct seq_file *m, void *v)
864 return show_smap(m, v, 1);
867 static int show_tid_smap(struct seq_file *m, void *v)
869 return show_smap(m, v, 0);
872 static const struct seq_operations proc_pid_smaps_op = {
876 .show = show_pid_smap
879 static const struct seq_operations proc_tid_smaps_op = {
883 .show = show_tid_smap
886 static int pid_smaps_open(struct inode *inode, struct file *file)
888 return do_maps_open(inode, file, &proc_pid_smaps_op);
891 static int pid_smaps_rollup_open(struct inode *inode, struct file *file)
893 struct seq_file *seq;
894 struct proc_maps_private *priv;
895 int ret = do_maps_open(inode, file, &proc_pid_smaps_op);
899 seq = file->private_data;
901 priv->rollup = kzalloc(sizeof(*priv->rollup), GFP_KERNEL);
903 proc_map_release(inode, file);
906 priv->rollup->first = true;
910 static int tid_smaps_open(struct inode *inode, struct file *file)
912 return do_maps_open(inode, file, &proc_tid_smaps_op);
915 const struct file_operations proc_pid_smaps_operations = {
916 .open = pid_smaps_open,
919 .release = proc_map_release,
922 const struct file_operations proc_pid_smaps_rollup_operations = {
923 .open = pid_smaps_rollup_open,
926 .release = proc_map_release,
929 const struct file_operations proc_tid_smaps_operations = {
930 .open = tid_smaps_open,
933 .release = proc_map_release,
936 enum clear_refs_types {
940 CLEAR_REFS_SOFT_DIRTY,
941 CLEAR_REFS_MM_HIWATER_RSS,
945 struct clear_refs_private {
946 enum clear_refs_types type;
949 #ifdef CONFIG_MEM_SOFT_DIRTY
950 static inline void clear_soft_dirty(struct vm_area_struct *vma,
951 unsigned long addr, pte_t *pte)
954 * The soft-dirty tracker uses #PF-s to catch writes
955 * to pages, so write-protect the pte as well. See the
956 * Documentation/vm/soft-dirty.txt for full description
957 * of how soft-dirty works.
961 if (pte_present(ptent)) {
962 ptent = ptep_modify_prot_start(vma->vm_mm, addr, pte);
963 ptent = pte_wrprotect(ptent);
964 ptent = pte_clear_soft_dirty(ptent);
965 ptep_modify_prot_commit(vma->vm_mm, addr, pte, ptent);
966 } else if (is_swap_pte(ptent)) {
967 ptent = pte_swp_clear_soft_dirty(ptent);
968 set_pte_at(vma->vm_mm, addr, pte, ptent);
972 static inline void clear_soft_dirty(struct vm_area_struct *vma,
973 unsigned long addr, pte_t *pte)
978 #if defined(CONFIG_MEM_SOFT_DIRTY) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
979 static inline void clear_soft_dirty_pmd(struct vm_area_struct *vma,
980 unsigned long addr, pmd_t *pmdp)
984 if (pmd_present(pmd)) {
985 /* See comment in change_huge_pmd() */
986 pmdp_invalidate(vma, addr, pmdp);
987 if (pmd_dirty(*pmdp))
988 pmd = pmd_mkdirty(pmd);
989 if (pmd_young(*pmdp))
990 pmd = pmd_mkyoung(pmd);
992 pmd = pmd_wrprotect(pmd);
993 pmd = pmd_clear_soft_dirty(pmd);
995 set_pmd_at(vma->vm_mm, addr, pmdp, pmd);
996 } else if (is_migration_entry(pmd_to_swp_entry(pmd))) {
997 pmd = pmd_swp_clear_soft_dirty(pmd);
998 set_pmd_at(vma->vm_mm, addr, pmdp, pmd);
1002 static inline void clear_soft_dirty_pmd(struct vm_area_struct *vma,
1003 unsigned long addr, pmd_t *pmdp)
1008 static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
1009 unsigned long end, struct mm_walk *walk)
1011 struct clear_refs_private *cp = walk->private;
1012 struct vm_area_struct *vma = walk->vma;
1017 ptl = pmd_trans_huge_lock(pmd, vma);
1019 if (cp->type == CLEAR_REFS_SOFT_DIRTY) {
1020 clear_soft_dirty_pmd(vma, addr, pmd);
1024 if (!pmd_present(*pmd))
1027 page = pmd_page(*pmd);
1029 /* Clear accessed and referenced bits. */
1030 pmdp_test_and_clear_young(vma, addr, pmd);
1031 test_and_clear_page_young(page);
1032 ClearPageReferenced(page);
1038 if (pmd_trans_unstable(pmd))
1041 pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
1042 for (; addr != end; pte++, addr += PAGE_SIZE) {
1045 if (cp->type == CLEAR_REFS_SOFT_DIRTY) {
1046 clear_soft_dirty(vma, addr, pte);
1050 if (!pte_present(ptent))
1053 page = vm_normal_page(vma, addr, ptent);
1057 /* Clear accessed and referenced bits. */
1058 ptep_test_and_clear_young(vma, addr, pte);
1059 test_and_clear_page_young(page);
1060 ClearPageReferenced(page);
1062 pte_unmap_unlock(pte - 1, ptl);
1067 static int clear_refs_test_walk(unsigned long start, unsigned long end,
1068 struct mm_walk *walk)
1070 struct clear_refs_private *cp = walk->private;
1071 struct vm_area_struct *vma = walk->vma;
1073 if (vma->vm_flags & VM_PFNMAP)
1077 * Writing 1 to /proc/pid/clear_refs affects all pages.
1078 * Writing 2 to /proc/pid/clear_refs only affects anonymous pages.
1079 * Writing 3 to /proc/pid/clear_refs only affects file mapped pages.
1080 * Writing 4 to /proc/pid/clear_refs affects all pages.
1082 if (cp->type == CLEAR_REFS_ANON && vma->vm_file)
1084 if (cp->type == CLEAR_REFS_MAPPED && !vma->vm_file)
1089 static ssize_t clear_refs_write(struct file *file, const char __user *buf,
1090 size_t count, loff_t *ppos)
1092 struct task_struct *task;
1093 char buffer[PROC_NUMBUF];
1094 struct mm_struct *mm;
1095 struct vm_area_struct *vma;
1096 enum clear_refs_types type;
1097 struct mmu_gather tlb;
1101 memset(buffer, 0, sizeof(buffer));
1102 if (count > sizeof(buffer) - 1)
1103 count = sizeof(buffer) - 1;
1104 if (copy_from_user(buffer, buf, count))
1106 rv = kstrtoint(strstrip(buffer), 10, &itype);
1109 type = (enum clear_refs_types)itype;
1110 if (type < CLEAR_REFS_ALL || type >= CLEAR_REFS_LAST)
1113 task = get_proc_task(file_inode(file));
1116 mm = get_task_mm(task);
1118 struct clear_refs_private cp = {
1121 struct mm_walk clear_refs_walk = {
1122 .pmd_entry = clear_refs_pte_range,
1123 .test_walk = clear_refs_test_walk,
1128 if (type == CLEAR_REFS_MM_HIWATER_RSS) {
1129 if (down_write_killable(&mm->mmap_sem)) {
1135 * Writing 5 to /proc/pid/clear_refs resets the peak
1136 * resident set size to this mm's current rss value.
1138 reset_mm_hiwater_rss(mm);
1139 up_write(&mm->mmap_sem);
1143 down_read(&mm->mmap_sem);
1144 tlb_gather_mmu(&tlb, mm, 0, -1);
1145 if (type == CLEAR_REFS_SOFT_DIRTY) {
1146 for (vma = mm->mmap; vma; vma = vma->vm_next) {
1147 if (!(vma->vm_flags & VM_SOFTDIRTY))
1149 up_read(&mm->mmap_sem);
1150 if (down_write_killable(&mm->mmap_sem)) {
1154 for (vma = mm->mmap; vma; vma = vma->vm_next) {
1155 vma->vm_flags &= ~VM_SOFTDIRTY;
1156 vma_set_page_prot(vma);
1158 downgrade_write(&mm->mmap_sem);
1161 mmu_notifier_invalidate_range_start(mm, 0, -1);
1163 walk_page_range(0, mm->highest_vm_end, &clear_refs_walk);
1164 if (type == CLEAR_REFS_SOFT_DIRTY)
1165 mmu_notifier_invalidate_range_end(mm, 0, -1);
1166 tlb_finish_mmu(&tlb, 0, -1);
1167 up_read(&mm->mmap_sem);
1171 put_task_struct(task);
1176 const struct file_operations proc_clear_refs_operations = {
1177 .write = clear_refs_write,
1178 .llseek = noop_llseek,
1185 struct pagemapread {
1186 int pos, len; /* units: PM_ENTRY_BYTES, not bytes */
1187 pagemap_entry_t *buffer;
1191 #define PAGEMAP_WALK_SIZE (PMD_SIZE)
1192 #define PAGEMAP_WALK_MASK (PMD_MASK)
1194 #define PM_ENTRY_BYTES sizeof(pagemap_entry_t)
1195 #define PM_PFRAME_BITS 55
1196 #define PM_PFRAME_MASK GENMASK_ULL(PM_PFRAME_BITS - 1, 0)
1197 #define PM_SOFT_DIRTY BIT_ULL(55)
1198 #define PM_MMAP_EXCLUSIVE BIT_ULL(56)
1199 #define PM_FILE BIT_ULL(61)
1200 #define PM_SWAP BIT_ULL(62)
1201 #define PM_PRESENT BIT_ULL(63)
1203 #define PM_END_OF_BUFFER 1
1205 static inline pagemap_entry_t make_pme(u64 frame, u64 flags)
1207 return (pagemap_entry_t) { .pme = (frame & PM_PFRAME_MASK) | flags };
1210 static int add_to_pagemap(unsigned long addr, pagemap_entry_t *pme,
1211 struct pagemapread *pm)
1213 pm->buffer[pm->pos++] = *pme;
1214 if (pm->pos >= pm->len)
1215 return PM_END_OF_BUFFER;
1219 static int pagemap_pte_hole(unsigned long start, unsigned long end,
1220 struct mm_walk *walk)
1222 struct pagemapread *pm = walk->private;
1223 unsigned long addr = start;
1226 while (addr < end) {
1227 struct vm_area_struct *vma = find_vma(walk->mm, addr);
1228 pagemap_entry_t pme = make_pme(0, 0);
1229 /* End of address space hole, which we mark as non-present. */
1230 unsigned long hole_end;
1233 hole_end = min(end, vma->vm_start);
1237 for (; addr < hole_end; addr += PAGE_SIZE) {
1238 err = add_to_pagemap(addr, &pme, pm);
1246 /* Addresses in the VMA. */
1247 if (vma->vm_flags & VM_SOFTDIRTY)
1248 pme = make_pme(0, PM_SOFT_DIRTY);
1249 for (; addr < min(end, vma->vm_end); addr += PAGE_SIZE) {
1250 err = add_to_pagemap(addr, &pme, pm);
1259 static pagemap_entry_t pte_to_pagemap_entry(struct pagemapread *pm,
1260 struct vm_area_struct *vma, unsigned long addr, pte_t pte)
1262 u64 frame = 0, flags = 0;
1263 struct page *page = NULL;
1265 if (pte_present(pte)) {
1267 frame = pte_pfn(pte);
1268 flags |= PM_PRESENT;
1269 page = _vm_normal_page(vma, addr, pte, true);
1270 if (pte_soft_dirty(pte))
1271 flags |= PM_SOFT_DIRTY;
1272 } else if (is_swap_pte(pte)) {
1274 if (pte_swp_soft_dirty(pte))
1275 flags |= PM_SOFT_DIRTY;
1276 entry = pte_to_swp_entry(pte);
1277 frame = swp_type(entry) |
1278 (swp_offset(entry) << MAX_SWAPFILES_SHIFT);
1280 if (is_migration_entry(entry))
1281 page = migration_entry_to_page(entry);
1283 if (is_device_private_entry(entry))
1284 page = device_private_entry_to_page(entry);
1287 if (page && !PageAnon(page))
1289 if (page && page_mapcount(page) == 1)
1290 flags |= PM_MMAP_EXCLUSIVE;
1291 if (vma->vm_flags & VM_SOFTDIRTY)
1292 flags |= PM_SOFT_DIRTY;
1294 return make_pme(frame, flags);
1297 static int pagemap_pmd_range(pmd_t *pmdp, unsigned long addr, unsigned long end,
1298 struct mm_walk *walk)
1300 struct vm_area_struct *vma = walk->vma;
1301 struct pagemapread *pm = walk->private;
1303 pte_t *pte, *orig_pte;
1306 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
1307 ptl = pmd_trans_huge_lock(pmdp, vma);
1309 u64 flags = 0, frame = 0;
1311 struct page *page = NULL;
1313 if ((vma->vm_flags & VM_SOFTDIRTY) || pmd_soft_dirty(pmd))
1314 flags |= PM_SOFT_DIRTY;
1316 if (pmd_present(pmd)) {
1317 page = pmd_page(pmd);
1319 flags |= PM_PRESENT;
1321 frame = pmd_pfn(pmd) +
1322 ((addr & ~PMD_MASK) >> PAGE_SHIFT);
1324 #ifdef CONFIG_ARCH_ENABLE_THP_MIGRATION
1325 else if (is_swap_pmd(pmd)) {
1326 swp_entry_t entry = pmd_to_swp_entry(pmd);
1328 frame = swp_type(entry) |
1329 (swp_offset(entry) << MAX_SWAPFILES_SHIFT);
1331 VM_BUG_ON(!is_pmd_migration_entry(pmd));
1332 page = migration_entry_to_page(entry);
1336 if (page && page_mapcount(page) == 1)
1337 flags |= PM_MMAP_EXCLUSIVE;
1339 for (; addr != end; addr += PAGE_SIZE) {
1340 pagemap_entry_t pme = make_pme(frame, flags);
1342 err = add_to_pagemap(addr, &pme, pm);
1345 if (pm->show_pfn && (flags & PM_PRESENT))
1352 if (pmd_trans_unstable(pmdp))
1354 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
1357 * We can assume that @vma always points to a valid one and @end never
1358 * goes beyond vma->vm_end.
1360 orig_pte = pte = pte_offset_map_lock(walk->mm, pmdp, addr, &ptl);
1361 for (; addr < end; pte++, addr += PAGE_SIZE) {
1362 pagemap_entry_t pme;
1364 pme = pte_to_pagemap_entry(pm, vma, addr, *pte);
1365 err = add_to_pagemap(addr, &pme, pm);
1369 pte_unmap_unlock(orig_pte, ptl);
1376 #ifdef CONFIG_HUGETLB_PAGE
1377 /* This function walks within one hugetlb entry in the single call */
1378 static int pagemap_hugetlb_range(pte_t *ptep, unsigned long hmask,
1379 unsigned long addr, unsigned long end,
1380 struct mm_walk *walk)
1382 struct pagemapread *pm = walk->private;
1383 struct vm_area_struct *vma = walk->vma;
1384 u64 flags = 0, frame = 0;
1388 if (vma->vm_flags & VM_SOFTDIRTY)
1389 flags |= PM_SOFT_DIRTY;
1391 pte = huge_ptep_get(ptep);
1392 if (pte_present(pte)) {
1393 struct page *page = pte_page(pte);
1395 if (!PageAnon(page))
1398 if (page_mapcount(page) == 1)
1399 flags |= PM_MMAP_EXCLUSIVE;
1401 flags |= PM_PRESENT;
1403 frame = pte_pfn(pte) +
1404 ((addr & ~hmask) >> PAGE_SHIFT);
1407 for (; addr != end; addr += PAGE_SIZE) {
1408 pagemap_entry_t pme = make_pme(frame, flags);
1410 err = add_to_pagemap(addr, &pme, pm);
1413 if (pm->show_pfn && (flags & PM_PRESENT))
1421 #endif /* HUGETLB_PAGE */
1424 * /proc/pid/pagemap - an array mapping virtual pages to pfns
1426 * For each page in the address space, this file contains one 64-bit entry
1427 * consisting of the following:
1429 * Bits 0-54 page frame number (PFN) if present
1430 * Bits 0-4 swap type if swapped
1431 * Bits 5-54 swap offset if swapped
1432 * Bit 55 pte is soft-dirty (see Documentation/vm/soft-dirty.txt)
1433 * Bit 56 page exclusively mapped
1435 * Bit 61 page is file-page or shared-anon
1436 * Bit 62 page swapped
1437 * Bit 63 page present
1439 * If the page is not present but in swap, then the PFN contains an
1440 * encoding of the swap file number and the page's offset into the
1441 * swap. Unmapped pages return a null PFN. This allows determining
1442 * precisely which pages are mapped (or in swap) and comparing mapped
1443 * pages between processes.
1445 * Efficient users of this interface will use /proc/pid/maps to
1446 * determine which areas of memory are actually mapped and llseek to
1447 * skip over unmapped regions.
1449 static ssize_t pagemap_read(struct file *file, char __user *buf,
1450 size_t count, loff_t *ppos)
1452 struct mm_struct *mm = file->private_data;
1453 struct pagemapread pm;
1454 struct mm_walk pagemap_walk = {};
1456 unsigned long svpfn;
1457 unsigned long start_vaddr;
1458 unsigned long end_vaddr;
1459 int ret = 0, copied = 0;
1461 if (!mm || !mmget_not_zero(mm))
1465 /* file position must be aligned */
1466 if ((*ppos % PM_ENTRY_BYTES) || (count % PM_ENTRY_BYTES))
1473 /* do not disclose physical addresses: attack vector */
1474 pm.show_pfn = file_ns_capable(file, &init_user_ns, CAP_SYS_ADMIN);
1476 pm.len = (PAGEMAP_WALK_SIZE >> PAGE_SHIFT);
1477 pm.buffer = kmalloc(pm.len * PM_ENTRY_BYTES, GFP_KERNEL);
1482 pagemap_walk.pmd_entry = pagemap_pmd_range;
1483 pagemap_walk.pte_hole = pagemap_pte_hole;
1484 #ifdef CONFIG_HUGETLB_PAGE
1485 pagemap_walk.hugetlb_entry = pagemap_hugetlb_range;
1487 pagemap_walk.mm = mm;
1488 pagemap_walk.private = ±
1491 svpfn = src / PM_ENTRY_BYTES;
1492 start_vaddr = svpfn << PAGE_SHIFT;
1493 end_vaddr = mm->task_size;
1495 /* watch out for wraparound */
1496 if (svpfn > mm->task_size >> PAGE_SHIFT)
1497 start_vaddr = end_vaddr;
1500 * The odds are that this will stop walking way
1501 * before end_vaddr, because the length of the
1502 * user buffer is tracked in "pm", and the walk
1503 * will stop when we hit the end of the buffer.
1506 while (count && (start_vaddr < end_vaddr)) {
1511 end = (start_vaddr + PAGEMAP_WALK_SIZE) & PAGEMAP_WALK_MASK;
1513 if (end < start_vaddr || end > end_vaddr)
1515 down_read(&mm->mmap_sem);
1516 ret = walk_page_range(start_vaddr, end, &pagemap_walk);
1517 up_read(&mm->mmap_sem);
1520 len = min(count, PM_ENTRY_BYTES * pm.pos);
1521 if (copy_to_user(buf, pm.buffer, len)) {
1530 if (!ret || ret == PM_END_OF_BUFFER)
1541 static int pagemap_open(struct inode *inode, struct file *file)
1543 struct mm_struct *mm;
1545 mm = proc_mem_open(inode, PTRACE_MODE_READ);
1548 file->private_data = mm;
1552 static int pagemap_release(struct inode *inode, struct file *file)
1554 struct mm_struct *mm = file->private_data;
1561 const struct file_operations proc_pagemap_operations = {
1562 .llseek = mem_lseek, /* borrow this */
1563 .read = pagemap_read,
1564 .open = pagemap_open,
1565 .release = pagemap_release,
1567 #endif /* CONFIG_PROC_PAGE_MONITOR */
1572 unsigned long pages;
1574 unsigned long active;
1575 unsigned long writeback;
1576 unsigned long mapcount_max;
1577 unsigned long dirty;
1578 unsigned long swapcache;
1579 unsigned long node[MAX_NUMNODES];
1582 struct numa_maps_private {
1583 struct proc_maps_private proc_maps;
1584 struct numa_maps md;
1587 static void gather_stats(struct page *page, struct numa_maps *md, int pte_dirty,
1588 unsigned long nr_pages)
1590 int count = page_mapcount(page);
1592 md->pages += nr_pages;
1593 if (pte_dirty || PageDirty(page))
1594 md->dirty += nr_pages;
1596 if (PageSwapCache(page))
1597 md->swapcache += nr_pages;
1599 if (PageActive(page) || PageUnevictable(page))
1600 md->active += nr_pages;
1602 if (PageWriteback(page))
1603 md->writeback += nr_pages;
1606 md->anon += nr_pages;
1608 if (count > md->mapcount_max)
1609 md->mapcount_max = count;
1611 md->node[page_to_nid(page)] += nr_pages;
1614 static struct page *can_gather_numa_stats(pte_t pte, struct vm_area_struct *vma,
1620 if (!pte_present(pte))
1623 page = vm_normal_page(vma, addr, pte);
1627 if (PageReserved(page))
1630 nid = page_to_nid(page);
1631 if (!node_isset(nid, node_states[N_MEMORY]))
1637 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
1638 static struct page *can_gather_numa_stats_pmd(pmd_t pmd,
1639 struct vm_area_struct *vma,
1645 if (!pmd_present(pmd))
1648 page = vm_normal_page_pmd(vma, addr, pmd);
1652 if (PageReserved(page))
1655 nid = page_to_nid(page);
1656 if (!node_isset(nid, node_states[N_MEMORY]))
1663 static int gather_pte_stats(pmd_t *pmd, unsigned long addr,
1664 unsigned long end, struct mm_walk *walk)
1666 struct numa_maps *md = walk->private;
1667 struct vm_area_struct *vma = walk->vma;
1672 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
1673 ptl = pmd_trans_huge_lock(pmd, vma);
1677 page = can_gather_numa_stats_pmd(*pmd, vma, addr);
1679 gather_stats(page, md, pmd_dirty(*pmd),
1680 HPAGE_PMD_SIZE/PAGE_SIZE);
1685 if (pmd_trans_unstable(pmd))
1688 orig_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
1690 struct page *page = can_gather_numa_stats(*pte, vma, addr);
1693 gather_stats(page, md, pte_dirty(*pte), 1);
1695 } while (pte++, addr += PAGE_SIZE, addr != end);
1696 pte_unmap_unlock(orig_pte, ptl);
1700 #ifdef CONFIG_HUGETLB_PAGE
1701 static int gather_hugetlb_stats(pte_t *pte, unsigned long hmask,
1702 unsigned long addr, unsigned long end, struct mm_walk *walk)
1704 pte_t huge_pte = huge_ptep_get(pte);
1705 struct numa_maps *md;
1708 if (!pte_present(huge_pte))
1711 page = pte_page(huge_pte);
1716 gather_stats(page, md, pte_dirty(huge_pte), 1);
1721 static int gather_hugetlb_stats(pte_t *pte, unsigned long hmask,
1722 unsigned long addr, unsigned long end, struct mm_walk *walk)
1729 * Display pages allocated per node and memory policy via /proc.
1731 static int show_numa_map(struct seq_file *m, void *v, int is_pid)
1733 struct numa_maps_private *numa_priv = m->private;
1734 struct proc_maps_private *proc_priv = &numa_priv->proc_maps;
1735 struct vm_area_struct *vma = v;
1736 struct numa_maps *md = &numa_priv->md;
1737 struct file *file = vma->vm_file;
1738 struct mm_struct *mm = vma->vm_mm;
1739 struct mm_walk walk = {
1740 .hugetlb_entry = gather_hugetlb_stats,
1741 .pmd_entry = gather_pte_stats,
1745 struct mempolicy *pol;
1752 /* Ensure we start with an empty set of numa_maps statistics. */
1753 memset(md, 0, sizeof(*md));
1755 pol = __get_vma_policy(vma, vma->vm_start);
1757 mpol_to_str(buffer, sizeof(buffer), pol);
1760 mpol_to_str(buffer, sizeof(buffer), proc_priv->task_mempolicy);
1763 seq_printf(m, "%08lx %s", vma->vm_start, buffer);
1766 seq_puts(m, " file=");
1767 seq_file_path(m, file, "\n\t= ");
1768 } else if (vma->vm_start <= mm->brk && vma->vm_end >= mm->start_brk) {
1769 seq_puts(m, " heap");
1770 } else if (is_stack(vma)) {
1771 seq_puts(m, " stack");
1774 if (is_vm_hugetlb_page(vma))
1775 seq_puts(m, " huge");
1777 /* mmap_sem is held by m_start */
1778 walk_page_vma(vma, &walk);
1784 seq_printf(m, " anon=%lu", md->anon);
1787 seq_printf(m, " dirty=%lu", md->dirty);
1789 if (md->pages != md->anon && md->pages != md->dirty)
1790 seq_printf(m, " mapped=%lu", md->pages);
1792 if (md->mapcount_max > 1)
1793 seq_printf(m, " mapmax=%lu", md->mapcount_max);
1796 seq_printf(m, " swapcache=%lu", md->swapcache);
1798 if (md->active < md->pages && !is_vm_hugetlb_page(vma))
1799 seq_printf(m, " active=%lu", md->active);
1802 seq_printf(m, " writeback=%lu", md->writeback);
1804 for_each_node_state(nid, N_MEMORY)
1806 seq_printf(m, " N%d=%lu", nid, md->node[nid]);
1808 seq_printf(m, " kernelpagesize_kB=%lu", vma_kernel_pagesize(vma) >> 10);
1811 m_cache_vma(m, vma);
1815 static int show_pid_numa_map(struct seq_file *m, void *v)
1817 return show_numa_map(m, v, 1);
1820 static int show_tid_numa_map(struct seq_file *m, void *v)
1822 return show_numa_map(m, v, 0);
1825 static const struct seq_operations proc_pid_numa_maps_op = {
1829 .show = show_pid_numa_map,
1832 static const struct seq_operations proc_tid_numa_maps_op = {
1836 .show = show_tid_numa_map,
1839 static int numa_maps_open(struct inode *inode, struct file *file,
1840 const struct seq_operations *ops)
1842 return proc_maps_open(inode, file, ops,
1843 sizeof(struct numa_maps_private));
1846 static int pid_numa_maps_open(struct inode *inode, struct file *file)
1848 return numa_maps_open(inode, file, &proc_pid_numa_maps_op);
1851 static int tid_numa_maps_open(struct inode *inode, struct file *file)
1853 return numa_maps_open(inode, file, &proc_tid_numa_maps_op);
1856 const struct file_operations proc_pid_numa_maps_operations = {
1857 .open = pid_numa_maps_open,
1859 .llseek = seq_lseek,
1860 .release = proc_map_release,
1863 const struct file_operations proc_tid_numa_maps_operations = {
1864 .open = tid_numa_maps_open,
1866 .llseek = seq_lseek,
1867 .release = proc_map_release,
1869 #endif /* CONFIG_NUMA */