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/swapops.h>
15 #include <linux/mmu_notifier.h>
16 #include <linux/page_idle.h>
17 #include <linux/shmem_fs.h>
20 #include <asm/uaccess.h>
21 #include <asm/tlbflush.h>
24 void task_mem(struct seq_file
*m
, struct mm_struct
*mm
)
26 unsigned long text
, lib
, swap
, ptes
, pmds
, anon
, file
, shmem
;
27 unsigned long hiwater_vm
, total_vm
, hiwater_rss
, total_rss
;
29 anon
= get_mm_counter(mm
, MM_ANONPAGES
);
30 file
= get_mm_counter(mm
, MM_FILEPAGES
);
31 shmem
= get_mm_counter(mm
, MM_SHMEMPAGES
);
34 * Note: to minimize their overhead, mm maintains hiwater_vm and
35 * hiwater_rss only when about to *lower* total_vm or rss. Any
36 * collector of these hiwater stats must therefore get total_vm
37 * and rss too, which will usually be the higher. Barriers? not
38 * worth the effort, such snapshots can always be inconsistent.
40 hiwater_vm
= total_vm
= mm
->total_vm
;
41 if (hiwater_vm
< mm
->hiwater_vm
)
42 hiwater_vm
= mm
->hiwater_vm
;
43 hiwater_rss
= total_rss
= anon
+ file
+ shmem
;
44 if (hiwater_rss
< mm
->hiwater_rss
)
45 hiwater_rss
= mm
->hiwater_rss
;
47 text
= (PAGE_ALIGN(mm
->end_code
) - (mm
->start_code
& PAGE_MASK
)) >> 10;
48 lib
= (mm
->exec_vm
<< (PAGE_SHIFT
-10)) - text
;
49 swap
= get_mm_counter(mm
, MM_SWAPENTS
);
50 ptes
= PTRS_PER_PTE
* sizeof(pte_t
) * atomic_long_read(&mm
->nr_ptes
);
51 pmds
= PTRS_PER_PMD
* sizeof(pmd_t
) * mm_nr_pmds(mm
);
61 "RssShmem:\t%8lu kB\n"
69 hiwater_vm
<< (PAGE_SHIFT
-10),
70 total_vm
<< (PAGE_SHIFT
-10),
71 mm
->locked_vm
<< (PAGE_SHIFT
-10),
72 mm
->pinned_vm
<< (PAGE_SHIFT
-10),
73 hiwater_rss
<< (PAGE_SHIFT
-10),
74 total_rss
<< (PAGE_SHIFT
-10),
75 anon
<< (PAGE_SHIFT
-10),
76 file
<< (PAGE_SHIFT
-10),
77 shmem
<< (PAGE_SHIFT
-10),
78 mm
->data_vm
<< (PAGE_SHIFT
-10),
79 mm
->stack_vm
<< (PAGE_SHIFT
-10), text
, lib
,
82 swap
<< (PAGE_SHIFT
-10));
83 hugetlb_report_usage(m
, mm
);
86 unsigned long task_vsize(struct mm_struct
*mm
)
88 return PAGE_SIZE
* mm
->total_vm
;
91 unsigned long task_statm(struct mm_struct
*mm
,
92 unsigned long *shared
, unsigned long *text
,
93 unsigned long *data
, unsigned long *resident
)
95 *shared
= get_mm_counter(mm
, MM_FILEPAGES
) +
96 get_mm_counter(mm
, MM_SHMEMPAGES
);
97 *text
= (PAGE_ALIGN(mm
->end_code
) - (mm
->start_code
& PAGE_MASK
))
99 *data
= mm
->data_vm
+ mm
->stack_vm
;
100 *resident
= *shared
+ get_mm_counter(mm
, MM_ANONPAGES
);
106 * Save get_task_policy() for show_numa_map().
108 static void hold_task_mempolicy(struct proc_maps_private
*priv
)
110 struct task_struct
*task
= priv
->task
;
113 priv
->task_mempolicy
= get_task_policy(task
);
114 mpol_get(priv
->task_mempolicy
);
117 static void release_task_mempolicy(struct proc_maps_private
*priv
)
119 mpol_put(priv
->task_mempolicy
);
122 static void hold_task_mempolicy(struct proc_maps_private
*priv
)
125 static void release_task_mempolicy(struct proc_maps_private
*priv
)
130 static void vma_stop(struct proc_maps_private
*priv
)
132 struct mm_struct
*mm
= priv
->mm
;
134 release_task_mempolicy(priv
);
135 up_read(&mm
->mmap_sem
);
139 static struct vm_area_struct
*
140 m_next_vma(struct proc_maps_private
*priv
, struct vm_area_struct
*vma
)
142 if (vma
== priv
->tail_vma
)
144 return vma
->vm_next
?: priv
->tail_vma
;
147 static void m_cache_vma(struct seq_file
*m
, struct vm_area_struct
*vma
)
149 if (m
->count
< m
->size
) /* vma is copied successfully */
150 m
->version
= m_next_vma(m
->private, vma
) ? vma
->vm_end
: -1UL;
153 static void *m_start(struct seq_file
*m
, loff_t
*ppos
)
155 struct proc_maps_private
*priv
= m
->private;
156 unsigned long last_addr
= m
->version
;
157 struct mm_struct
*mm
;
158 struct vm_area_struct
*vma
;
159 unsigned int pos
= *ppos
;
161 /* See m_cache_vma(). Zero at the start or after lseek. */
162 if (last_addr
== -1UL)
165 priv
->task
= get_proc_task(priv
->inode
);
167 return ERR_PTR(-ESRCH
);
170 if (!mm
|| !atomic_inc_not_zero(&mm
->mm_users
))
173 down_read(&mm
->mmap_sem
);
174 hold_task_mempolicy(priv
);
175 priv
->tail_vma
= get_gate_vma(mm
);
178 vma
= find_vma(mm
, last_addr
- 1);
179 if (vma
&& vma
->vm_start
<= last_addr
)
180 vma
= m_next_vma(priv
, vma
);
186 if (pos
< mm
->map_count
) {
187 for (vma
= mm
->mmap
; pos
; pos
--) {
188 m
->version
= vma
->vm_start
;
194 /* we do not bother to update m->version in this case */
195 if (pos
== mm
->map_count
&& priv
->tail_vma
)
196 return priv
->tail_vma
;
202 static void *m_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
204 struct proc_maps_private
*priv
= m
->private;
205 struct vm_area_struct
*next
;
208 next
= m_next_vma(priv
, v
);
214 static void m_stop(struct seq_file
*m
, void *v
)
216 struct proc_maps_private
*priv
= m
->private;
218 if (!IS_ERR_OR_NULL(v
))
221 put_task_struct(priv
->task
);
226 static int proc_maps_open(struct inode
*inode
, struct file
*file
,
227 const struct seq_operations
*ops
, int psize
)
229 struct proc_maps_private
*priv
= __seq_open_private(file
, ops
, psize
);
235 priv
->mm
= proc_mem_open(inode
, PTRACE_MODE_READ
);
236 if (IS_ERR(priv
->mm
)) {
237 int err
= PTR_ERR(priv
->mm
);
239 seq_release_private(inode
, file
);
246 static int proc_map_release(struct inode
*inode
, struct file
*file
)
248 struct seq_file
*seq
= file
->private_data
;
249 struct proc_maps_private
*priv
= seq
->private;
254 return seq_release_private(inode
, file
);
257 static int do_maps_open(struct inode
*inode
, struct file
*file
,
258 const struct seq_operations
*ops
)
260 return proc_maps_open(inode
, file
, ops
,
261 sizeof(struct proc_maps_private
));
265 * Indicate if the VMA is a stack for the given task; for
266 * /proc/PID/maps that is the stack of the main task.
268 static int is_stack(struct proc_maps_private
*priv
,
269 struct vm_area_struct
*vma
, int is_pid
)
274 stack
= vma
->vm_start
<= vma
->vm_mm
->start_stack
&&
275 vma
->vm_end
>= vma
->vm_mm
->start_stack
;
277 struct inode
*inode
= priv
->inode
;
278 struct task_struct
*task
;
281 task
= pid_task(proc_pid(inode
), PIDTYPE_PID
);
283 stack
= vma_is_stack_for_task(vma
, task
);
290 show_map_vma(struct seq_file
*m
, struct vm_area_struct
*vma
, int is_pid
)
292 struct mm_struct
*mm
= vma
->vm_mm
;
293 struct file
*file
= vma
->vm_file
;
294 struct proc_maps_private
*priv
= m
->private;
295 vm_flags_t flags
= vma
->vm_flags
;
296 unsigned long ino
= 0;
297 unsigned long long pgoff
= 0;
298 unsigned long start
, end
;
300 const char *name
= NULL
;
303 struct inode
*inode
= file_inode(vma
->vm_file
);
304 dev
= inode
->i_sb
->s_dev
;
306 pgoff
= ((loff_t
)vma
->vm_pgoff
) << PAGE_SHIFT
;
309 /* We don't show the stack guard page in /proc/maps */
310 start
= vma
->vm_start
;
311 if (stack_guard_page_start(vma
, start
))
314 if (stack_guard_page_end(vma
, end
))
317 seq_setwidth(m
, 25 + sizeof(void *) * 6 - 1);
318 seq_printf(m
, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu ",
321 flags
& VM_READ
? 'r' : '-',
322 flags
& VM_WRITE
? 'w' : '-',
323 flags
& VM_EXEC
? 'x' : '-',
324 flags
& VM_MAYSHARE
? 's' : 'p',
326 MAJOR(dev
), MINOR(dev
), ino
);
329 * Print the dentry name for named mappings, and a
330 * special [heap] marker for the heap:
334 seq_file_path(m
, file
, "\n");
338 if (vma
->vm_ops
&& vma
->vm_ops
->name
) {
339 name
= vma
->vm_ops
->name(vma
);
344 name
= arch_vma_name(vma
);
351 if (vma
->vm_start
<= mm
->brk
&&
352 vma
->vm_end
>= mm
->start_brk
) {
357 if (is_stack(priv
, vma
, is_pid
))
369 static int show_map(struct seq_file
*m
, void *v
, int is_pid
)
371 show_map_vma(m
, v
, is_pid
);
376 static int show_pid_map(struct seq_file
*m
, void *v
)
378 return show_map(m
, v
, 1);
381 static int show_tid_map(struct seq_file
*m
, void *v
)
383 return show_map(m
, v
, 0);
386 static const struct seq_operations proc_pid_maps_op
= {
393 static const struct seq_operations proc_tid_maps_op
= {
400 static int pid_maps_open(struct inode
*inode
, struct file
*file
)
402 return do_maps_open(inode
, file
, &proc_pid_maps_op
);
405 static int tid_maps_open(struct inode
*inode
, struct file
*file
)
407 return do_maps_open(inode
, file
, &proc_tid_maps_op
);
410 const struct file_operations proc_pid_maps_operations
= {
411 .open
= pid_maps_open
,
414 .release
= proc_map_release
,
417 const struct file_operations proc_tid_maps_operations
= {
418 .open
= tid_maps_open
,
421 .release
= proc_map_release
,
425 * Proportional Set Size(PSS): my share of RSS.
427 * PSS of a process is the count of pages it has in memory, where each
428 * page is divided by the number of processes sharing it. So if a
429 * process has 1000 pages all to itself, and 1000 shared with one other
430 * process, its PSS will be 1500.
432 * To keep (accumulated) division errors low, we adopt a 64bit
433 * fixed-point pss counter to minimize division errors. So (pss >>
434 * PSS_SHIFT) would be the real byte count.
436 * A shift of 12 before division means (assuming 4K page size):
437 * - 1M 3-user-pages add up to 8KB errors;
438 * - supports mapcount up to 2^24, or 16M;
439 * - supports PSS up to 2^52 bytes, or 4PB.
443 #ifdef CONFIG_PROC_PAGE_MONITOR
444 struct mem_size_stats
{
445 unsigned long resident
;
446 unsigned long shared_clean
;
447 unsigned long shared_dirty
;
448 unsigned long private_clean
;
449 unsigned long private_dirty
;
450 unsigned long referenced
;
451 unsigned long anonymous
;
452 unsigned long anonymous_thp
;
453 unsigned long shmem_thp
;
455 unsigned long shared_hugetlb
;
456 unsigned long private_hugetlb
;
459 bool check_shmem_swap
;
462 static void smaps_account(struct mem_size_stats
*mss
, struct page
*page
,
463 bool compound
, bool young
, bool dirty
)
465 int i
, nr
= compound
? 1 << compound_order(page
) : 1;
466 unsigned long size
= nr
* PAGE_SIZE
;
469 mss
->anonymous
+= size
;
471 mss
->resident
+= size
;
472 /* Accumulate the size in pages that have been accessed. */
473 if (young
|| page_is_young(page
) || PageReferenced(page
))
474 mss
->referenced
+= size
;
477 * page_count(page) == 1 guarantees the page is mapped exactly once.
478 * If any subpage of the compound page mapped with PTE it would elevate
481 if (page_count(page
) == 1) {
482 if (dirty
|| PageDirty(page
))
483 mss
->private_dirty
+= size
;
485 mss
->private_clean
+= size
;
486 mss
->pss
+= (u64
)size
<< PSS_SHIFT
;
490 for (i
= 0; i
< nr
; i
++, page
++) {
491 int mapcount
= page_mapcount(page
);
494 if (dirty
|| PageDirty(page
))
495 mss
->shared_dirty
+= PAGE_SIZE
;
497 mss
->shared_clean
+= PAGE_SIZE
;
498 mss
->pss
+= (PAGE_SIZE
<< PSS_SHIFT
) / mapcount
;
500 if (dirty
|| PageDirty(page
))
501 mss
->private_dirty
+= PAGE_SIZE
;
503 mss
->private_clean
+= PAGE_SIZE
;
504 mss
->pss
+= PAGE_SIZE
<< PSS_SHIFT
;
510 static int smaps_pte_hole(unsigned long addr
, unsigned long end
,
511 struct mm_walk
*walk
)
513 struct mem_size_stats
*mss
= walk
->private;
515 mss
->swap
+= shmem_partial_swap_usage(
516 walk
->vma
->vm_file
->f_mapping
, addr
, end
);
522 static void smaps_pte_entry(pte_t
*pte
, unsigned long addr
,
523 struct mm_walk
*walk
)
525 struct mem_size_stats
*mss
= walk
->private;
526 struct vm_area_struct
*vma
= walk
->vma
;
527 struct page
*page
= NULL
;
529 if (pte_present(*pte
)) {
530 page
= vm_normal_page(vma
, addr
, *pte
);
531 } else if (is_swap_pte(*pte
)) {
532 swp_entry_t swpent
= pte_to_swp_entry(*pte
);
534 if (!non_swap_entry(swpent
)) {
537 mss
->swap
+= PAGE_SIZE
;
538 mapcount
= swp_swapcount(swpent
);
540 u64 pss_delta
= (u64
)PAGE_SIZE
<< PSS_SHIFT
;
542 do_div(pss_delta
, mapcount
);
543 mss
->swap_pss
+= pss_delta
;
545 mss
->swap_pss
+= (u64
)PAGE_SIZE
<< PSS_SHIFT
;
547 } else if (is_migration_entry(swpent
))
548 page
= migration_entry_to_page(swpent
);
549 } else if (unlikely(IS_ENABLED(CONFIG_SHMEM
) && mss
->check_shmem_swap
550 && pte_none(*pte
))) {
551 page
= find_get_entry(vma
->vm_file
->f_mapping
,
552 linear_page_index(vma
, addr
));
556 if (radix_tree_exceptional_entry(page
))
557 mss
->swap
+= PAGE_SIZE
;
567 smaps_account(mss
, page
, false, pte_young(*pte
), pte_dirty(*pte
));
570 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
571 static void smaps_pmd_entry(pmd_t
*pmd
, unsigned long addr
,
572 struct mm_walk
*walk
)
574 struct mem_size_stats
*mss
= walk
->private;
575 struct vm_area_struct
*vma
= walk
->vma
;
578 /* FOLL_DUMP will return -EFAULT on huge zero page */
579 page
= follow_trans_huge_pmd(vma
, addr
, pmd
, FOLL_DUMP
);
580 if (IS_ERR_OR_NULL(page
))
583 mss
->anonymous_thp
+= HPAGE_PMD_SIZE
;
584 else if (PageSwapBacked(page
))
585 mss
->shmem_thp
+= HPAGE_PMD_SIZE
;
586 else if (is_zone_device_page(page
))
589 VM_BUG_ON_PAGE(1, page
);
590 smaps_account(mss
, page
, true, pmd_young(*pmd
), pmd_dirty(*pmd
));
593 static void smaps_pmd_entry(pmd_t
*pmd
, unsigned long addr
,
594 struct mm_walk
*walk
)
599 static int smaps_pte_range(pmd_t
*pmd
, unsigned long addr
, unsigned long end
,
600 struct mm_walk
*walk
)
602 struct vm_area_struct
*vma
= walk
->vma
;
606 ptl
= pmd_trans_huge_lock(pmd
, vma
);
608 smaps_pmd_entry(pmd
, addr
, walk
);
613 if (pmd_trans_unstable(pmd
))
616 * The mmap_sem held all the way back in m_start() is what
617 * keeps khugepaged out of here and from collapsing things
620 pte
= pte_offset_map_lock(vma
->vm_mm
, pmd
, addr
, &ptl
);
621 for (; addr
!= end
; pte
++, addr
+= PAGE_SIZE
)
622 smaps_pte_entry(pte
, addr
, walk
);
623 pte_unmap_unlock(pte
- 1, ptl
);
628 static void show_smap_vma_flags(struct seq_file
*m
, struct vm_area_struct
*vma
)
631 * Don't forget to update Documentation/ on changes.
633 static const char mnemonics
[BITS_PER_LONG
][2] = {
635 * In case if we meet a flag we don't know about.
637 [0 ... (BITS_PER_LONG
-1)] = "??",
639 [ilog2(VM_READ
)] = "rd",
640 [ilog2(VM_WRITE
)] = "wr",
641 [ilog2(VM_EXEC
)] = "ex",
642 [ilog2(VM_SHARED
)] = "sh",
643 [ilog2(VM_MAYREAD
)] = "mr",
644 [ilog2(VM_MAYWRITE
)] = "mw",
645 [ilog2(VM_MAYEXEC
)] = "me",
646 [ilog2(VM_MAYSHARE
)] = "ms",
647 [ilog2(VM_GROWSDOWN
)] = "gd",
648 [ilog2(VM_PFNMAP
)] = "pf",
649 [ilog2(VM_DENYWRITE
)] = "dw",
650 #ifdef CONFIG_X86_INTEL_MPX
651 [ilog2(VM_MPX
)] = "mp",
653 [ilog2(VM_LOCKED
)] = "lo",
654 [ilog2(VM_IO
)] = "io",
655 [ilog2(VM_SEQ_READ
)] = "sr",
656 [ilog2(VM_RAND_READ
)] = "rr",
657 [ilog2(VM_DONTCOPY
)] = "dc",
658 [ilog2(VM_DONTEXPAND
)] = "de",
659 [ilog2(VM_ACCOUNT
)] = "ac",
660 [ilog2(VM_NORESERVE
)] = "nr",
661 [ilog2(VM_HUGETLB
)] = "ht",
662 [ilog2(VM_ARCH_1
)] = "ar",
663 [ilog2(VM_DONTDUMP
)] = "dd",
664 #ifdef CONFIG_MEM_SOFT_DIRTY
665 [ilog2(VM_SOFTDIRTY
)] = "sd",
667 [ilog2(VM_MIXEDMAP
)] = "mm",
668 [ilog2(VM_HUGEPAGE
)] = "hg",
669 [ilog2(VM_NOHUGEPAGE
)] = "nh",
670 [ilog2(VM_MERGEABLE
)] = "mg",
671 [ilog2(VM_UFFD_MISSING
)]= "um",
672 [ilog2(VM_UFFD_WP
)] = "uw",
673 #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
674 /* These come out via ProtectionKey: */
675 [ilog2(VM_PKEY_BIT0
)] = "",
676 [ilog2(VM_PKEY_BIT1
)] = "",
677 [ilog2(VM_PKEY_BIT2
)] = "",
678 [ilog2(VM_PKEY_BIT3
)] = "",
683 seq_puts(m
, "VmFlags: ");
684 for (i
= 0; i
< BITS_PER_LONG
; i
++) {
685 if (!mnemonics
[i
][0])
687 if (vma
->vm_flags
& (1UL << i
)) {
688 seq_printf(m
, "%c%c ",
689 mnemonics
[i
][0], mnemonics
[i
][1]);
695 #ifdef CONFIG_HUGETLB_PAGE
696 static int smaps_hugetlb_range(pte_t
*pte
, unsigned long hmask
,
697 unsigned long addr
, unsigned long end
,
698 struct mm_walk
*walk
)
700 struct mem_size_stats
*mss
= walk
->private;
701 struct vm_area_struct
*vma
= walk
->vma
;
702 struct page
*page
= NULL
;
704 if (pte_present(*pte
)) {
705 page
= vm_normal_page(vma
, addr
, *pte
);
706 } else if (is_swap_pte(*pte
)) {
707 swp_entry_t swpent
= pte_to_swp_entry(*pte
);
709 if (is_migration_entry(swpent
))
710 page
= migration_entry_to_page(swpent
);
713 int mapcount
= page_mapcount(page
);
716 mss
->shared_hugetlb
+= huge_page_size(hstate_vma(vma
));
718 mss
->private_hugetlb
+= huge_page_size(hstate_vma(vma
));
722 #endif /* HUGETLB_PAGE */
724 void __weak
arch_show_smap(struct seq_file
*m
, struct vm_area_struct
*vma
)
728 static int show_smap(struct seq_file
*m
, void *v
, int is_pid
)
730 struct vm_area_struct
*vma
= v
;
731 struct mem_size_stats mss
;
732 struct mm_walk smaps_walk
= {
733 .pmd_entry
= smaps_pte_range
,
734 #ifdef CONFIG_HUGETLB_PAGE
735 .hugetlb_entry
= smaps_hugetlb_range
,
741 memset(&mss
, 0, sizeof mss
);
744 if (vma
->vm_file
&& shmem_mapping(vma
->vm_file
->f_mapping
)) {
746 * For shared or readonly shmem mappings we know that all
747 * swapped out pages belong to the shmem object, and we can
748 * obtain the swap value much more efficiently. For private
749 * writable mappings, we might have COW pages that are
750 * not affected by the parent swapped out pages of the shmem
751 * object, so we have to distinguish them during the page walk.
752 * Unless we know that the shmem object (or the part mapped by
753 * our VMA) has no swapped out pages at all.
755 unsigned long shmem_swapped
= shmem_swap_usage(vma
);
757 if (!shmem_swapped
|| (vma
->vm_flags
& VM_SHARED
) ||
758 !(vma
->vm_flags
& VM_WRITE
)) {
759 mss
.swap
= shmem_swapped
;
761 mss
.check_shmem_swap
= true;
762 smaps_walk
.pte_hole
= smaps_pte_hole
;
767 /* mmap_sem is held in m_start */
768 walk_page_vma(vma
, &smaps_walk
);
770 show_map_vma(m
, vma
, is_pid
);
776 "Shared_Clean: %8lu kB\n"
777 "Shared_Dirty: %8lu kB\n"
778 "Private_Clean: %8lu kB\n"
779 "Private_Dirty: %8lu kB\n"
780 "Referenced: %8lu kB\n"
781 "Anonymous: %8lu kB\n"
782 "AnonHugePages: %8lu kB\n"
783 "ShmemPmdMapped: %8lu kB\n"
784 "Shared_Hugetlb: %8lu kB\n"
785 "Private_Hugetlb: %7lu kB\n"
788 "KernelPageSize: %8lu kB\n"
789 "MMUPageSize: %8lu kB\n"
791 (vma
->vm_end
- vma
->vm_start
) >> 10,
793 (unsigned long)(mss
.pss
>> (10 + PSS_SHIFT
)),
794 mss
.shared_clean
>> 10,
795 mss
.shared_dirty
>> 10,
796 mss
.private_clean
>> 10,
797 mss
.private_dirty
>> 10,
798 mss
.referenced
>> 10,
800 mss
.anonymous_thp
>> 10,
802 mss
.shared_hugetlb
>> 10,
803 mss
.private_hugetlb
>> 10,
805 (unsigned long)(mss
.swap_pss
>> (10 + PSS_SHIFT
)),
806 vma_kernel_pagesize(vma
) >> 10,
807 vma_mmu_pagesize(vma
) >> 10,
808 (vma
->vm_flags
& VM_LOCKED
) ?
809 (unsigned long)(mss
.pss
>> (10 + PSS_SHIFT
)) : 0);
811 arch_show_smap(m
, vma
);
812 show_smap_vma_flags(m
, vma
);
817 static int show_pid_smap(struct seq_file
*m
, void *v
)
819 return show_smap(m
, v
, 1);
822 static int show_tid_smap(struct seq_file
*m
, void *v
)
824 return show_smap(m
, v
, 0);
827 static const struct seq_operations proc_pid_smaps_op
= {
831 .show
= show_pid_smap
834 static const struct seq_operations proc_tid_smaps_op
= {
838 .show
= show_tid_smap
841 static int pid_smaps_open(struct inode
*inode
, struct file
*file
)
843 return do_maps_open(inode
, file
, &proc_pid_smaps_op
);
846 static int tid_smaps_open(struct inode
*inode
, struct file
*file
)
848 return do_maps_open(inode
, file
, &proc_tid_smaps_op
);
851 const struct file_operations proc_pid_smaps_operations
= {
852 .open
= pid_smaps_open
,
855 .release
= proc_map_release
,
858 const struct file_operations proc_tid_smaps_operations
= {
859 .open
= tid_smaps_open
,
862 .release
= proc_map_release
,
865 enum clear_refs_types
{
869 CLEAR_REFS_SOFT_DIRTY
,
870 CLEAR_REFS_MM_HIWATER_RSS
,
874 struct clear_refs_private
{
875 enum clear_refs_types type
;
878 #ifdef CONFIG_MEM_SOFT_DIRTY
879 static inline void clear_soft_dirty(struct vm_area_struct
*vma
,
880 unsigned long addr
, pte_t
*pte
)
883 * The soft-dirty tracker uses #PF-s to catch writes
884 * to pages, so write-protect the pte as well. See the
885 * Documentation/vm/soft-dirty.txt for full description
886 * of how soft-dirty works.
890 if (pte_present(ptent
)) {
891 ptent
= ptep_modify_prot_start(vma
->vm_mm
, addr
, pte
);
892 ptent
= pte_wrprotect(ptent
);
893 ptent
= pte_clear_soft_dirty(ptent
);
894 ptep_modify_prot_commit(vma
->vm_mm
, addr
, pte
, ptent
);
895 } else if (is_swap_pte(ptent
)) {
896 ptent
= pte_swp_clear_soft_dirty(ptent
);
897 set_pte_at(vma
->vm_mm
, addr
, pte
, ptent
);
901 static inline void clear_soft_dirty(struct vm_area_struct
*vma
,
902 unsigned long addr
, pte_t
*pte
)
907 #if defined(CONFIG_MEM_SOFT_DIRTY) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
908 static inline void clear_soft_dirty_pmd(struct vm_area_struct
*vma
,
909 unsigned long addr
, pmd_t
*pmdp
)
911 pmd_t pmd
= pmdp_huge_get_and_clear(vma
->vm_mm
, addr
, pmdp
);
913 pmd
= pmd_wrprotect(pmd
);
914 pmd
= pmd_clear_soft_dirty(pmd
);
916 set_pmd_at(vma
->vm_mm
, addr
, pmdp
, pmd
);
919 static inline void clear_soft_dirty_pmd(struct vm_area_struct
*vma
,
920 unsigned long addr
, pmd_t
*pmdp
)
925 static int clear_refs_pte_range(pmd_t
*pmd
, unsigned long addr
,
926 unsigned long end
, struct mm_walk
*walk
)
928 struct clear_refs_private
*cp
= walk
->private;
929 struct vm_area_struct
*vma
= walk
->vma
;
934 ptl
= pmd_trans_huge_lock(pmd
, vma
);
936 if (cp
->type
== CLEAR_REFS_SOFT_DIRTY
) {
937 clear_soft_dirty_pmd(vma
, addr
, pmd
);
941 page
= pmd_page(*pmd
);
943 /* Clear accessed and referenced bits. */
944 pmdp_test_and_clear_young(vma
, addr
, pmd
);
945 test_and_clear_page_young(page
);
946 ClearPageReferenced(page
);
952 if (pmd_trans_unstable(pmd
))
955 pte
= pte_offset_map_lock(vma
->vm_mm
, pmd
, addr
, &ptl
);
956 for (; addr
!= end
; pte
++, addr
+= PAGE_SIZE
) {
959 if (cp
->type
== CLEAR_REFS_SOFT_DIRTY
) {
960 clear_soft_dirty(vma
, addr
, pte
);
964 if (!pte_present(ptent
))
967 page
= vm_normal_page(vma
, addr
, ptent
);
971 /* Clear accessed and referenced bits. */
972 ptep_test_and_clear_young(vma
, addr
, pte
);
973 test_and_clear_page_young(page
);
974 ClearPageReferenced(page
);
976 pte_unmap_unlock(pte
- 1, ptl
);
981 static int clear_refs_test_walk(unsigned long start
, unsigned long end
,
982 struct mm_walk
*walk
)
984 struct clear_refs_private
*cp
= walk
->private;
985 struct vm_area_struct
*vma
= walk
->vma
;
987 if (vma
->vm_flags
& VM_PFNMAP
)
991 * Writing 1 to /proc/pid/clear_refs affects all pages.
992 * Writing 2 to /proc/pid/clear_refs only affects anonymous pages.
993 * Writing 3 to /proc/pid/clear_refs only affects file mapped pages.
994 * Writing 4 to /proc/pid/clear_refs affects all pages.
996 if (cp
->type
== CLEAR_REFS_ANON
&& vma
->vm_file
)
998 if (cp
->type
== CLEAR_REFS_MAPPED
&& !vma
->vm_file
)
1003 static ssize_t
clear_refs_write(struct file
*file
, const char __user
*buf
,
1004 size_t count
, loff_t
*ppos
)
1006 struct task_struct
*task
;
1007 char buffer
[PROC_NUMBUF
];
1008 struct mm_struct
*mm
;
1009 struct vm_area_struct
*vma
;
1010 enum clear_refs_types type
;
1014 memset(buffer
, 0, sizeof(buffer
));
1015 if (count
> sizeof(buffer
) - 1)
1016 count
= sizeof(buffer
) - 1;
1017 if (copy_from_user(buffer
, buf
, count
))
1019 rv
= kstrtoint(strstrip(buffer
), 10, &itype
);
1022 type
= (enum clear_refs_types
)itype
;
1023 if (type
< CLEAR_REFS_ALL
|| type
>= CLEAR_REFS_LAST
)
1026 task
= get_proc_task(file_inode(file
));
1029 mm
= get_task_mm(task
);
1031 struct clear_refs_private cp
= {
1034 struct mm_walk clear_refs_walk
= {
1035 .pmd_entry
= clear_refs_pte_range
,
1036 .test_walk
= clear_refs_test_walk
,
1041 if (type
== CLEAR_REFS_MM_HIWATER_RSS
) {
1042 if (down_write_killable(&mm
->mmap_sem
)) {
1048 * Writing 5 to /proc/pid/clear_refs resets the peak
1049 * resident set size to this mm's current rss value.
1051 reset_mm_hiwater_rss(mm
);
1052 up_write(&mm
->mmap_sem
);
1056 down_read(&mm
->mmap_sem
);
1057 if (type
== CLEAR_REFS_SOFT_DIRTY
) {
1058 for (vma
= mm
->mmap
; vma
; vma
= vma
->vm_next
) {
1059 if (!(vma
->vm_flags
& VM_SOFTDIRTY
))
1061 up_read(&mm
->mmap_sem
);
1062 if (down_write_killable(&mm
->mmap_sem
)) {
1066 for (vma
= mm
->mmap
; vma
; vma
= vma
->vm_next
) {
1067 vma
->vm_flags
&= ~VM_SOFTDIRTY
;
1068 vma_set_page_prot(vma
);
1070 downgrade_write(&mm
->mmap_sem
);
1073 mmu_notifier_invalidate_range_start(mm
, 0, -1);
1075 walk_page_range(0, mm
->highest_vm_end
, &clear_refs_walk
);
1076 if (type
== CLEAR_REFS_SOFT_DIRTY
)
1077 mmu_notifier_invalidate_range_end(mm
, 0, -1);
1079 up_read(&mm
->mmap_sem
);
1083 put_task_struct(task
);
1088 const struct file_operations proc_clear_refs_operations
= {
1089 .write
= clear_refs_write
,
1090 .llseek
= noop_llseek
,
1097 struct pagemapread
{
1098 int pos
, len
; /* units: PM_ENTRY_BYTES, not bytes */
1099 pagemap_entry_t
*buffer
;
1103 #define PAGEMAP_WALK_SIZE (PMD_SIZE)
1104 #define PAGEMAP_WALK_MASK (PMD_MASK)
1106 #define PM_ENTRY_BYTES sizeof(pagemap_entry_t)
1107 #define PM_PFRAME_BITS 55
1108 #define PM_PFRAME_MASK GENMASK_ULL(PM_PFRAME_BITS - 1, 0)
1109 #define PM_SOFT_DIRTY BIT_ULL(55)
1110 #define PM_MMAP_EXCLUSIVE BIT_ULL(56)
1111 #define PM_FILE BIT_ULL(61)
1112 #define PM_SWAP BIT_ULL(62)
1113 #define PM_PRESENT BIT_ULL(63)
1115 #define PM_END_OF_BUFFER 1
1117 static inline pagemap_entry_t
make_pme(u64 frame
, u64 flags
)
1119 return (pagemap_entry_t
) { .pme
= (frame
& PM_PFRAME_MASK
) | flags
};
1122 static int add_to_pagemap(unsigned long addr
, pagemap_entry_t
*pme
,
1123 struct pagemapread
*pm
)
1125 pm
->buffer
[pm
->pos
++] = *pme
;
1126 if (pm
->pos
>= pm
->len
)
1127 return PM_END_OF_BUFFER
;
1131 static int pagemap_pte_hole(unsigned long start
, unsigned long end
,
1132 struct mm_walk
*walk
)
1134 struct pagemapread
*pm
= walk
->private;
1135 unsigned long addr
= start
;
1138 while (addr
< end
) {
1139 struct vm_area_struct
*vma
= find_vma(walk
->mm
, addr
);
1140 pagemap_entry_t pme
= make_pme(0, 0);
1141 /* End of address space hole, which we mark as non-present. */
1142 unsigned long hole_end
;
1145 hole_end
= min(end
, vma
->vm_start
);
1149 for (; addr
< hole_end
; addr
+= PAGE_SIZE
) {
1150 err
= add_to_pagemap(addr
, &pme
, pm
);
1158 /* Addresses in the VMA. */
1159 if (vma
->vm_flags
& VM_SOFTDIRTY
)
1160 pme
= make_pme(0, PM_SOFT_DIRTY
);
1161 for (; addr
< min(end
, vma
->vm_end
); addr
+= PAGE_SIZE
) {
1162 err
= add_to_pagemap(addr
, &pme
, pm
);
1171 static pagemap_entry_t
pte_to_pagemap_entry(struct pagemapread
*pm
,
1172 struct vm_area_struct
*vma
, unsigned long addr
, pte_t pte
)
1174 u64 frame
= 0, flags
= 0;
1175 struct page
*page
= NULL
;
1177 if (pte_present(pte
)) {
1179 frame
= pte_pfn(pte
);
1180 flags
|= PM_PRESENT
;
1181 page
= vm_normal_page(vma
, addr
, pte
);
1182 if (pte_soft_dirty(pte
))
1183 flags
|= PM_SOFT_DIRTY
;
1184 } else if (is_swap_pte(pte
)) {
1186 if (pte_swp_soft_dirty(pte
))
1187 flags
|= PM_SOFT_DIRTY
;
1188 entry
= pte_to_swp_entry(pte
);
1189 frame
= swp_type(entry
) |
1190 (swp_offset(entry
) << MAX_SWAPFILES_SHIFT
);
1192 if (is_migration_entry(entry
))
1193 page
= migration_entry_to_page(entry
);
1196 if (page
&& !PageAnon(page
))
1198 if (page
&& page_mapcount(page
) == 1)
1199 flags
|= PM_MMAP_EXCLUSIVE
;
1200 if (vma
->vm_flags
& VM_SOFTDIRTY
)
1201 flags
|= PM_SOFT_DIRTY
;
1203 return make_pme(frame
, flags
);
1206 static int pagemap_pmd_range(pmd_t
*pmdp
, unsigned long addr
, unsigned long end
,
1207 struct mm_walk
*walk
)
1209 struct vm_area_struct
*vma
= walk
->vma
;
1210 struct pagemapread
*pm
= walk
->private;
1212 pte_t
*pte
, *orig_pte
;
1215 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
1216 ptl
= pmd_trans_huge_lock(pmdp
, vma
);
1218 u64 flags
= 0, frame
= 0;
1221 if ((vma
->vm_flags
& VM_SOFTDIRTY
) || pmd_soft_dirty(pmd
))
1222 flags
|= PM_SOFT_DIRTY
;
1225 * Currently pmd for thp is always present because thp
1226 * can not be swapped-out, migrated, or HWPOISONed
1227 * (split in such cases instead.)
1228 * This if-check is just to prepare for future implementation.
1230 if (pmd_present(pmd
)) {
1231 struct page
*page
= pmd_page(pmd
);
1233 if (page_mapcount(page
) == 1)
1234 flags
|= PM_MMAP_EXCLUSIVE
;
1236 flags
|= PM_PRESENT
;
1238 frame
= pmd_pfn(pmd
) +
1239 ((addr
& ~PMD_MASK
) >> PAGE_SHIFT
);
1242 for (; addr
!= end
; addr
+= PAGE_SIZE
) {
1243 pagemap_entry_t pme
= make_pme(frame
, flags
);
1245 err
= add_to_pagemap(addr
, &pme
, pm
);
1248 if (pm
->show_pfn
&& (flags
& PM_PRESENT
))
1255 if (pmd_trans_unstable(pmdp
))
1257 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
1260 * We can assume that @vma always points to a valid one and @end never
1261 * goes beyond vma->vm_end.
1263 orig_pte
= pte
= pte_offset_map_lock(walk
->mm
, pmdp
, addr
, &ptl
);
1264 for (; addr
< end
; pte
++, addr
+= PAGE_SIZE
) {
1265 pagemap_entry_t pme
;
1267 pme
= pte_to_pagemap_entry(pm
, vma
, addr
, *pte
);
1268 err
= add_to_pagemap(addr
, &pme
, pm
);
1272 pte_unmap_unlock(orig_pte
, ptl
);
1279 #ifdef CONFIG_HUGETLB_PAGE
1280 /* This function walks within one hugetlb entry in the single call */
1281 static int pagemap_hugetlb_range(pte_t
*ptep
, unsigned long hmask
,
1282 unsigned long addr
, unsigned long end
,
1283 struct mm_walk
*walk
)
1285 struct pagemapread
*pm
= walk
->private;
1286 struct vm_area_struct
*vma
= walk
->vma
;
1287 u64 flags
= 0, frame
= 0;
1291 if (vma
->vm_flags
& VM_SOFTDIRTY
)
1292 flags
|= PM_SOFT_DIRTY
;
1294 pte
= huge_ptep_get(ptep
);
1295 if (pte_present(pte
)) {
1296 struct page
*page
= pte_page(pte
);
1298 if (!PageAnon(page
))
1301 if (page_mapcount(page
) == 1)
1302 flags
|= PM_MMAP_EXCLUSIVE
;
1304 flags
|= PM_PRESENT
;
1306 frame
= pte_pfn(pte
) +
1307 ((addr
& ~hmask
) >> PAGE_SHIFT
);
1310 for (; addr
!= end
; addr
+= PAGE_SIZE
) {
1311 pagemap_entry_t pme
= make_pme(frame
, flags
);
1313 err
= add_to_pagemap(addr
, &pme
, pm
);
1316 if (pm
->show_pfn
&& (flags
& PM_PRESENT
))
1324 #endif /* HUGETLB_PAGE */
1327 * /proc/pid/pagemap - an array mapping virtual pages to pfns
1329 * For each page in the address space, this file contains one 64-bit entry
1330 * consisting of the following:
1332 * Bits 0-54 page frame number (PFN) if present
1333 * Bits 0-4 swap type if swapped
1334 * Bits 5-54 swap offset if swapped
1335 * Bit 55 pte is soft-dirty (see Documentation/vm/soft-dirty.txt)
1336 * Bit 56 page exclusively mapped
1338 * Bit 61 page is file-page or shared-anon
1339 * Bit 62 page swapped
1340 * Bit 63 page present
1342 * If the page is not present but in swap, then the PFN contains an
1343 * encoding of the swap file number and the page's offset into the
1344 * swap. Unmapped pages return a null PFN. This allows determining
1345 * precisely which pages are mapped (or in swap) and comparing mapped
1346 * pages between processes.
1348 * Efficient users of this interface will use /proc/pid/maps to
1349 * determine which areas of memory are actually mapped and llseek to
1350 * skip over unmapped regions.
1352 static ssize_t
pagemap_read(struct file
*file
, char __user
*buf
,
1353 size_t count
, loff_t
*ppos
)
1355 struct mm_struct
*mm
= file
->private_data
;
1356 struct pagemapread pm
;
1357 struct mm_walk pagemap_walk
= {};
1359 unsigned long svpfn
;
1360 unsigned long start_vaddr
;
1361 unsigned long end_vaddr
;
1362 int ret
= 0, copied
= 0;
1364 if (!mm
|| !atomic_inc_not_zero(&mm
->mm_users
))
1368 /* file position must be aligned */
1369 if ((*ppos
% PM_ENTRY_BYTES
) || (count
% PM_ENTRY_BYTES
))
1376 /* do not disclose physical addresses: attack vector */
1377 pm
.show_pfn
= file_ns_capable(file
, &init_user_ns
, CAP_SYS_ADMIN
);
1379 pm
.len
= (PAGEMAP_WALK_SIZE
>> PAGE_SHIFT
);
1380 pm
.buffer
= kmalloc(pm
.len
* PM_ENTRY_BYTES
, GFP_TEMPORARY
);
1385 pagemap_walk
.pmd_entry
= pagemap_pmd_range
;
1386 pagemap_walk
.pte_hole
= pagemap_pte_hole
;
1387 #ifdef CONFIG_HUGETLB_PAGE
1388 pagemap_walk
.hugetlb_entry
= pagemap_hugetlb_range
;
1390 pagemap_walk
.mm
= mm
;
1391 pagemap_walk
.private = &pm
;
1394 svpfn
= src
/ PM_ENTRY_BYTES
;
1395 start_vaddr
= svpfn
<< PAGE_SHIFT
;
1396 end_vaddr
= mm
->task_size
;
1398 /* watch out for wraparound */
1399 if (svpfn
> mm
->task_size
>> PAGE_SHIFT
)
1400 start_vaddr
= end_vaddr
;
1403 * The odds are that this will stop walking way
1404 * before end_vaddr, because the length of the
1405 * user buffer is tracked in "pm", and the walk
1406 * will stop when we hit the end of the buffer.
1409 while (count
&& (start_vaddr
< end_vaddr
)) {
1414 end
= (start_vaddr
+ PAGEMAP_WALK_SIZE
) & PAGEMAP_WALK_MASK
;
1416 if (end
< start_vaddr
|| end
> end_vaddr
)
1418 down_read(&mm
->mmap_sem
);
1419 ret
= walk_page_range(start_vaddr
, end
, &pagemap_walk
);
1420 up_read(&mm
->mmap_sem
);
1423 len
= min(count
, PM_ENTRY_BYTES
* pm
.pos
);
1424 if (copy_to_user(buf
, pm
.buffer
, len
)) {
1433 if (!ret
|| ret
== PM_END_OF_BUFFER
)
1444 static int pagemap_open(struct inode
*inode
, struct file
*file
)
1446 struct mm_struct
*mm
;
1448 mm
= proc_mem_open(inode
, PTRACE_MODE_READ
);
1451 file
->private_data
= mm
;
1455 static int pagemap_release(struct inode
*inode
, struct file
*file
)
1457 struct mm_struct
*mm
= file
->private_data
;
1464 const struct file_operations proc_pagemap_operations
= {
1465 .llseek
= mem_lseek
, /* borrow this */
1466 .read
= pagemap_read
,
1467 .open
= pagemap_open
,
1468 .release
= pagemap_release
,
1470 #endif /* CONFIG_PROC_PAGE_MONITOR */
1475 unsigned long pages
;
1477 unsigned long active
;
1478 unsigned long writeback
;
1479 unsigned long mapcount_max
;
1480 unsigned long dirty
;
1481 unsigned long swapcache
;
1482 unsigned long node
[MAX_NUMNODES
];
1485 struct numa_maps_private
{
1486 struct proc_maps_private proc_maps
;
1487 struct numa_maps md
;
1490 static void gather_stats(struct page
*page
, struct numa_maps
*md
, int pte_dirty
,
1491 unsigned long nr_pages
)
1493 int count
= page_mapcount(page
);
1495 md
->pages
+= nr_pages
;
1496 if (pte_dirty
|| PageDirty(page
))
1497 md
->dirty
+= nr_pages
;
1499 if (PageSwapCache(page
))
1500 md
->swapcache
+= nr_pages
;
1502 if (PageActive(page
) || PageUnevictable(page
))
1503 md
->active
+= nr_pages
;
1505 if (PageWriteback(page
))
1506 md
->writeback
+= nr_pages
;
1509 md
->anon
+= nr_pages
;
1511 if (count
> md
->mapcount_max
)
1512 md
->mapcount_max
= count
;
1514 md
->node
[page_to_nid(page
)] += nr_pages
;
1517 static struct page
*can_gather_numa_stats(pte_t pte
, struct vm_area_struct
*vma
,
1523 if (!pte_present(pte
))
1526 page
= vm_normal_page(vma
, addr
, pte
);
1530 if (PageReserved(page
))
1533 nid
= page_to_nid(page
);
1534 if (!node_isset(nid
, node_states
[N_MEMORY
]))
1540 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
1541 static struct page
*can_gather_numa_stats_pmd(pmd_t pmd
,
1542 struct vm_area_struct
*vma
,
1548 if (!pmd_present(pmd
))
1551 page
= vm_normal_page_pmd(vma
, addr
, pmd
);
1555 if (PageReserved(page
))
1558 nid
= page_to_nid(page
);
1559 if (!node_isset(nid
, node_states
[N_MEMORY
]))
1566 static int gather_pte_stats(pmd_t
*pmd
, unsigned long addr
,
1567 unsigned long end
, struct mm_walk
*walk
)
1569 struct numa_maps
*md
= walk
->private;
1570 struct vm_area_struct
*vma
= walk
->vma
;
1575 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
1576 ptl
= pmd_trans_huge_lock(pmd
, vma
);
1580 page
= can_gather_numa_stats_pmd(*pmd
, vma
, addr
);
1582 gather_stats(page
, md
, pmd_dirty(*pmd
),
1583 HPAGE_PMD_SIZE
/PAGE_SIZE
);
1588 if (pmd_trans_unstable(pmd
))
1591 orig_pte
= pte
= pte_offset_map_lock(walk
->mm
, pmd
, addr
, &ptl
);
1593 struct page
*page
= can_gather_numa_stats(*pte
, vma
, addr
);
1596 gather_stats(page
, md
, pte_dirty(*pte
), 1);
1598 } while (pte
++, addr
+= PAGE_SIZE
, addr
!= end
);
1599 pte_unmap_unlock(orig_pte
, ptl
);
1602 #ifdef CONFIG_HUGETLB_PAGE
1603 static int gather_hugetlb_stats(pte_t
*pte
, unsigned long hmask
,
1604 unsigned long addr
, unsigned long end
, struct mm_walk
*walk
)
1606 pte_t huge_pte
= huge_ptep_get(pte
);
1607 struct numa_maps
*md
;
1610 if (!pte_present(huge_pte
))
1613 page
= pte_page(huge_pte
);
1618 gather_stats(page
, md
, pte_dirty(huge_pte
), 1);
1623 static int gather_hugetlb_stats(pte_t
*pte
, unsigned long hmask
,
1624 unsigned long addr
, unsigned long end
, struct mm_walk
*walk
)
1631 * Display pages allocated per node and memory policy via /proc.
1633 static int show_numa_map(struct seq_file
*m
, void *v
, int is_pid
)
1635 struct numa_maps_private
*numa_priv
= m
->private;
1636 struct proc_maps_private
*proc_priv
= &numa_priv
->proc_maps
;
1637 struct vm_area_struct
*vma
= v
;
1638 struct numa_maps
*md
= &numa_priv
->md
;
1639 struct file
*file
= vma
->vm_file
;
1640 struct mm_struct
*mm
= vma
->vm_mm
;
1641 struct mm_walk walk
= {
1642 .hugetlb_entry
= gather_hugetlb_stats
,
1643 .pmd_entry
= gather_pte_stats
,
1647 struct mempolicy
*pol
;
1654 /* Ensure we start with an empty set of numa_maps statistics. */
1655 memset(md
, 0, sizeof(*md
));
1657 pol
= __get_vma_policy(vma
, vma
->vm_start
);
1659 mpol_to_str(buffer
, sizeof(buffer
), pol
);
1662 mpol_to_str(buffer
, sizeof(buffer
), proc_priv
->task_mempolicy
);
1665 seq_printf(m
, "%08lx %s", vma
->vm_start
, buffer
);
1668 seq_puts(m
, " file=");
1669 seq_file_path(m
, file
, "\n\t= ");
1670 } else if (vma
->vm_start
<= mm
->brk
&& vma
->vm_end
>= mm
->start_brk
) {
1671 seq_puts(m
, " heap");
1672 } else if (is_stack(proc_priv
, vma
, is_pid
)) {
1673 seq_puts(m
, " stack");
1676 if (is_vm_hugetlb_page(vma
))
1677 seq_puts(m
, " huge");
1679 /* mmap_sem is held by m_start */
1680 walk_page_vma(vma
, &walk
);
1686 seq_printf(m
, " anon=%lu", md
->anon
);
1689 seq_printf(m
, " dirty=%lu", md
->dirty
);
1691 if (md
->pages
!= md
->anon
&& md
->pages
!= md
->dirty
)
1692 seq_printf(m
, " mapped=%lu", md
->pages
);
1694 if (md
->mapcount_max
> 1)
1695 seq_printf(m
, " mapmax=%lu", md
->mapcount_max
);
1698 seq_printf(m
, " swapcache=%lu", md
->swapcache
);
1700 if (md
->active
< md
->pages
&& !is_vm_hugetlb_page(vma
))
1701 seq_printf(m
, " active=%lu", md
->active
);
1704 seq_printf(m
, " writeback=%lu", md
->writeback
);
1706 for_each_node_state(nid
, N_MEMORY
)
1708 seq_printf(m
, " N%d=%lu", nid
, md
->node
[nid
]);
1710 seq_printf(m
, " kernelpagesize_kB=%lu", vma_kernel_pagesize(vma
) >> 10);
1713 m_cache_vma(m
, vma
);
1717 static int show_pid_numa_map(struct seq_file
*m
, void *v
)
1719 return show_numa_map(m
, v
, 1);
1722 static int show_tid_numa_map(struct seq_file
*m
, void *v
)
1724 return show_numa_map(m
, v
, 0);
1727 static const struct seq_operations proc_pid_numa_maps_op
= {
1731 .show
= show_pid_numa_map
,
1734 static const struct seq_operations proc_tid_numa_maps_op
= {
1738 .show
= show_tid_numa_map
,
1741 static int numa_maps_open(struct inode
*inode
, struct file
*file
,
1742 const struct seq_operations
*ops
)
1744 return proc_maps_open(inode
, file
, ops
,
1745 sizeof(struct numa_maps_private
));
1748 static int pid_numa_maps_open(struct inode
*inode
, struct file
*file
)
1750 return numa_maps_open(inode
, file
, &proc_pid_numa_maps_op
);
1753 static int tid_numa_maps_open(struct inode
*inode
, struct file
*file
)
1755 return numa_maps_open(inode
, file
, &proc_tid_numa_maps_op
);
1758 const struct file_operations proc_pid_numa_maps_operations
= {
1759 .open
= pid_numa_maps_open
,
1761 .llseek
= seq_lseek
,
1762 .release
= proc_map_release
,
1765 const struct file_operations proc_tid_numa_maps_operations
= {
1766 .open
= tid_numa_maps_open
,
1768 .llseek
= seq_lseek
,
1769 .release
= proc_map_release
,
1771 #endif /* CONFIG_NUMA */