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>
21 #include <linux/uaccess.h>
22 #include <asm/tlbflush.h>
25 void task_mem(struct seq_file
*m
, struct mm_struct
*mm
)
27 unsigned long text
, lib
, swap
, ptes
, pmds
, anon
, file
, shmem
;
28 unsigned long hiwater_vm
, total_vm
, hiwater_rss
, total_rss
;
30 anon
= get_mm_counter(mm
, MM_ANONPAGES
);
31 file
= get_mm_counter(mm
, MM_FILEPAGES
);
32 shmem
= get_mm_counter(mm
, MM_SHMEMPAGES
);
35 * Note: to minimize their overhead, mm maintains hiwater_vm and
36 * hiwater_rss only when about to *lower* total_vm or rss. Any
37 * collector of these hiwater stats must therefore get total_vm
38 * and rss too, which will usually be the higher. Barriers? not
39 * worth the effort, such snapshots can always be inconsistent.
41 hiwater_vm
= total_vm
= mm
->total_vm
;
42 if (hiwater_vm
< mm
->hiwater_vm
)
43 hiwater_vm
= mm
->hiwater_vm
;
44 hiwater_rss
= total_rss
= anon
+ file
+ shmem
;
45 if (hiwater_rss
< mm
->hiwater_rss
)
46 hiwater_rss
= mm
->hiwater_rss
;
48 text
= (PAGE_ALIGN(mm
->end_code
) - (mm
->start_code
& PAGE_MASK
)) >> 10;
49 lib
= (mm
->exec_vm
<< (PAGE_SHIFT
-10)) - text
;
50 swap
= get_mm_counter(mm
, MM_SWAPENTS
);
51 ptes
= PTRS_PER_PTE
* sizeof(pte_t
) * atomic_long_read(&mm
->nr_ptes
);
52 pmds
= PTRS_PER_PMD
* sizeof(pmd_t
) * mm_nr_pmds(mm
);
62 "RssShmem:\t%8lu kB\n"
70 hiwater_vm
<< (PAGE_SHIFT
-10),
71 total_vm
<< (PAGE_SHIFT
-10),
72 mm
->locked_vm
<< (PAGE_SHIFT
-10),
73 mm
->pinned_vm
<< (PAGE_SHIFT
-10),
74 hiwater_rss
<< (PAGE_SHIFT
-10),
75 total_rss
<< (PAGE_SHIFT
-10),
76 anon
<< (PAGE_SHIFT
-10),
77 file
<< (PAGE_SHIFT
-10),
78 shmem
<< (PAGE_SHIFT
-10),
79 mm
->data_vm
<< (PAGE_SHIFT
-10),
80 mm
->stack_vm
<< (PAGE_SHIFT
-10), text
, lib
,
83 swap
<< (PAGE_SHIFT
-10));
84 hugetlb_report_usage(m
, mm
);
87 unsigned long task_vsize(struct mm_struct
*mm
)
89 return PAGE_SIZE
* mm
->total_vm
;
92 unsigned long task_statm(struct mm_struct
*mm
,
93 unsigned long *shared
, unsigned long *text
,
94 unsigned long *data
, unsigned long *resident
)
96 *shared
= get_mm_counter(mm
, MM_FILEPAGES
) +
97 get_mm_counter(mm
, MM_SHMEMPAGES
);
98 *text
= (PAGE_ALIGN(mm
->end_code
) - (mm
->start_code
& PAGE_MASK
))
100 *data
= mm
->data_vm
+ mm
->stack_vm
;
101 *resident
= *shared
+ get_mm_counter(mm
, MM_ANONPAGES
);
107 * Save get_task_policy() for show_numa_map().
109 static void hold_task_mempolicy(struct proc_maps_private
*priv
)
111 struct task_struct
*task
= priv
->task
;
114 priv
->task_mempolicy
= get_task_policy(task
);
115 mpol_get(priv
->task_mempolicy
);
118 static void release_task_mempolicy(struct proc_maps_private
*priv
)
120 mpol_put(priv
->task_mempolicy
);
123 static void hold_task_mempolicy(struct proc_maps_private
*priv
)
126 static void release_task_mempolicy(struct proc_maps_private
*priv
)
131 static void vma_stop(struct proc_maps_private
*priv
)
133 struct mm_struct
*mm
= priv
->mm
;
135 release_task_mempolicy(priv
);
136 up_read(&mm
->mmap_sem
);
140 static struct vm_area_struct
*
141 m_next_vma(struct proc_maps_private
*priv
, struct vm_area_struct
*vma
)
143 if (vma
== priv
->tail_vma
)
145 return vma
->vm_next
?: priv
->tail_vma
;
148 static void m_cache_vma(struct seq_file
*m
, struct vm_area_struct
*vma
)
150 if (m
->count
< m
->size
) /* vma is copied successfully */
151 m
->version
= m_next_vma(m
->private, vma
) ? vma
->vm_end
: -1UL;
154 static void *m_start(struct seq_file
*m
, loff_t
*ppos
)
156 struct proc_maps_private
*priv
= m
->private;
157 unsigned long last_addr
= m
->version
;
158 struct mm_struct
*mm
;
159 struct vm_area_struct
*vma
;
160 unsigned int pos
= *ppos
;
162 /* See m_cache_vma(). Zero at the start or after lseek. */
163 if (last_addr
== -1UL)
166 priv
->task
= get_proc_task(priv
->inode
);
168 return ERR_PTR(-ESRCH
);
171 if (!mm
|| !mmget_not_zero(mm
))
174 down_read(&mm
->mmap_sem
);
175 hold_task_mempolicy(priv
);
176 priv
->tail_vma
= get_gate_vma(mm
);
179 vma
= find_vma(mm
, last_addr
- 1);
180 if (vma
&& vma
->vm_start
<= last_addr
)
181 vma
= m_next_vma(priv
, vma
);
187 if (pos
< mm
->map_count
) {
188 for (vma
= mm
->mmap
; pos
; pos
--) {
189 m
->version
= vma
->vm_start
;
195 /* we do not bother to update m->version in this case */
196 if (pos
== mm
->map_count
&& priv
->tail_vma
)
197 return priv
->tail_vma
;
203 static void *m_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
205 struct proc_maps_private
*priv
= m
->private;
206 struct vm_area_struct
*next
;
209 next
= m_next_vma(priv
, v
);
215 static void m_stop(struct seq_file
*m
, void *v
)
217 struct proc_maps_private
*priv
= m
->private;
219 if (!IS_ERR_OR_NULL(v
))
222 put_task_struct(priv
->task
);
227 static int proc_maps_open(struct inode
*inode
, struct file
*file
,
228 const struct seq_operations
*ops
, int psize
)
230 struct proc_maps_private
*priv
= __seq_open_private(file
, ops
, psize
);
236 priv
->mm
= proc_mem_open(inode
, PTRACE_MODE_READ
);
237 if (IS_ERR(priv
->mm
)) {
238 int err
= PTR_ERR(priv
->mm
);
240 seq_release_private(inode
, file
);
247 static int proc_map_release(struct inode
*inode
, struct file
*file
)
249 struct seq_file
*seq
= file
->private_data
;
250 struct proc_maps_private
*priv
= seq
->private;
255 return seq_release_private(inode
, file
);
258 static int do_maps_open(struct inode
*inode
, struct file
*file
,
259 const struct seq_operations
*ops
)
261 return proc_maps_open(inode
, file
, ops
,
262 sizeof(struct proc_maps_private
));
266 * Indicate if the VMA is a stack for the given task; for
267 * /proc/PID/maps that is the stack of the main task.
269 static int is_stack(struct proc_maps_private
*priv
,
270 struct vm_area_struct
*vma
)
273 * We make no effort to guess what a given thread considers to be
274 * its "stack". It's not even well-defined for programs written
277 return vma
->vm_start
<= vma
->vm_mm
->start_stack
&&
278 vma
->vm_end
>= vma
->vm_mm
->start_stack
;
282 show_map_vma(struct seq_file
*m
, struct vm_area_struct
*vma
, int is_pid
)
284 struct mm_struct
*mm
= vma
->vm_mm
;
285 struct file
*file
= vma
->vm_file
;
286 struct proc_maps_private
*priv
= m
->private;
287 vm_flags_t flags
= vma
->vm_flags
;
288 unsigned long ino
= 0;
289 unsigned long long pgoff
= 0;
290 unsigned long start
, end
;
292 const char *name
= NULL
;
295 struct inode
*inode
= file_inode(vma
->vm_file
);
296 dev
= inode
->i_sb
->s_dev
;
298 pgoff
= ((loff_t
)vma
->vm_pgoff
) << PAGE_SHIFT
;
301 /* We don't show the stack guard page in /proc/maps */
302 start
= vma
->vm_start
;
303 if (stack_guard_page_start(vma
, start
))
306 if (stack_guard_page_end(vma
, end
))
309 seq_setwidth(m
, 25 + sizeof(void *) * 6 - 1);
310 seq_printf(m
, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu ",
313 flags
& VM_READ
? 'r' : '-',
314 flags
& VM_WRITE
? 'w' : '-',
315 flags
& VM_EXEC
? 'x' : '-',
316 flags
& VM_MAYSHARE
? 's' : 'p',
318 MAJOR(dev
), MINOR(dev
), ino
);
321 * Print the dentry name for named mappings, and a
322 * special [heap] marker for the heap:
326 seq_file_path(m
, file
, "\n");
330 if (vma
->vm_ops
&& vma
->vm_ops
->name
) {
331 name
= vma
->vm_ops
->name(vma
);
336 name
= arch_vma_name(vma
);
343 if (vma
->vm_start
<= mm
->brk
&&
344 vma
->vm_end
>= mm
->start_brk
) {
349 if (is_stack(priv
, vma
))
361 static int show_map(struct seq_file
*m
, void *v
, int is_pid
)
363 show_map_vma(m
, v
, is_pid
);
368 static int show_pid_map(struct seq_file
*m
, void *v
)
370 return show_map(m
, v
, 1);
373 static int show_tid_map(struct seq_file
*m
, void *v
)
375 return show_map(m
, v
, 0);
378 static const struct seq_operations proc_pid_maps_op
= {
385 static const struct seq_operations proc_tid_maps_op
= {
392 static int pid_maps_open(struct inode
*inode
, struct file
*file
)
394 return do_maps_open(inode
, file
, &proc_pid_maps_op
);
397 static int tid_maps_open(struct inode
*inode
, struct file
*file
)
399 return do_maps_open(inode
, file
, &proc_tid_maps_op
);
402 const struct file_operations proc_pid_maps_operations
= {
403 .open
= pid_maps_open
,
406 .release
= proc_map_release
,
409 const struct file_operations proc_tid_maps_operations
= {
410 .open
= tid_maps_open
,
413 .release
= proc_map_release
,
417 * Proportional Set Size(PSS): my share of RSS.
419 * PSS of a process is the count of pages it has in memory, where each
420 * page is divided by the number of processes sharing it. So if a
421 * process has 1000 pages all to itself, and 1000 shared with one other
422 * process, its PSS will be 1500.
424 * To keep (accumulated) division errors low, we adopt a 64bit
425 * fixed-point pss counter to minimize division errors. So (pss >>
426 * PSS_SHIFT) would be the real byte count.
428 * A shift of 12 before division means (assuming 4K page size):
429 * - 1M 3-user-pages add up to 8KB errors;
430 * - supports mapcount up to 2^24, or 16M;
431 * - supports PSS up to 2^52 bytes, or 4PB.
435 #ifdef CONFIG_PROC_PAGE_MONITOR
436 struct mem_size_stats
{
437 unsigned long resident
;
438 unsigned long shared_clean
;
439 unsigned long shared_dirty
;
440 unsigned long private_clean
;
441 unsigned long private_dirty
;
442 unsigned long referenced
;
443 unsigned long anonymous
;
444 unsigned long lazyfree
;
445 unsigned long anonymous_thp
;
446 unsigned long shmem_thp
;
448 unsigned long shared_hugetlb
;
449 unsigned long private_hugetlb
;
452 bool check_shmem_swap
;
455 static void smaps_account(struct mem_size_stats
*mss
, struct page
*page
,
456 bool compound
, bool young
, bool dirty
)
458 int i
, nr
= compound
? 1 << compound_order(page
) : 1;
459 unsigned long size
= nr
* PAGE_SIZE
;
461 if (PageAnon(page
)) {
462 mss
->anonymous
+= size
;
463 if (!PageSwapBacked(page
) && !dirty
&& !PageDirty(page
))
464 mss
->lazyfree
+= size
;
467 mss
->resident
+= size
;
468 /* Accumulate the size in pages that have been accessed. */
469 if (young
|| page_is_young(page
) || PageReferenced(page
))
470 mss
->referenced
+= size
;
473 * page_count(page) == 1 guarantees the page is mapped exactly once.
474 * If any subpage of the compound page mapped with PTE it would elevate
477 if (page_count(page
) == 1) {
478 if (dirty
|| PageDirty(page
))
479 mss
->private_dirty
+= size
;
481 mss
->private_clean
+= size
;
482 mss
->pss
+= (u64
)size
<< PSS_SHIFT
;
486 for (i
= 0; i
< nr
; i
++, page
++) {
487 int mapcount
= page_mapcount(page
);
490 if (dirty
|| PageDirty(page
))
491 mss
->shared_dirty
+= PAGE_SIZE
;
493 mss
->shared_clean
+= PAGE_SIZE
;
494 mss
->pss
+= (PAGE_SIZE
<< PSS_SHIFT
) / mapcount
;
496 if (dirty
|| PageDirty(page
))
497 mss
->private_dirty
+= PAGE_SIZE
;
499 mss
->private_clean
+= PAGE_SIZE
;
500 mss
->pss
+= PAGE_SIZE
<< PSS_SHIFT
;
506 static int smaps_pte_hole(unsigned long addr
, unsigned long end
,
507 struct mm_walk
*walk
)
509 struct mem_size_stats
*mss
= walk
->private;
511 mss
->swap
+= shmem_partial_swap_usage(
512 walk
->vma
->vm_file
->f_mapping
, addr
, end
);
518 static void smaps_pte_entry(pte_t
*pte
, unsigned long addr
,
519 struct mm_walk
*walk
)
521 struct mem_size_stats
*mss
= walk
->private;
522 struct vm_area_struct
*vma
= walk
->vma
;
523 struct page
*page
= NULL
;
525 if (pte_present(*pte
)) {
526 page
= vm_normal_page(vma
, addr
, *pte
);
527 } else if (is_swap_pte(*pte
)) {
528 swp_entry_t swpent
= pte_to_swp_entry(*pte
);
530 if (!non_swap_entry(swpent
)) {
533 mss
->swap
+= PAGE_SIZE
;
534 mapcount
= swp_swapcount(swpent
);
536 u64 pss_delta
= (u64
)PAGE_SIZE
<< PSS_SHIFT
;
538 do_div(pss_delta
, mapcount
);
539 mss
->swap_pss
+= pss_delta
;
541 mss
->swap_pss
+= (u64
)PAGE_SIZE
<< PSS_SHIFT
;
543 } else if (is_migration_entry(swpent
))
544 page
= migration_entry_to_page(swpent
);
545 } else if (unlikely(IS_ENABLED(CONFIG_SHMEM
) && mss
->check_shmem_swap
546 && pte_none(*pte
))) {
547 page
= find_get_entry(vma
->vm_file
->f_mapping
,
548 linear_page_index(vma
, addr
));
552 if (radix_tree_exceptional_entry(page
))
553 mss
->swap
+= PAGE_SIZE
;
563 smaps_account(mss
, page
, false, pte_young(*pte
), pte_dirty(*pte
));
566 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
567 static void smaps_pmd_entry(pmd_t
*pmd
, unsigned long addr
,
568 struct mm_walk
*walk
)
570 struct mem_size_stats
*mss
= walk
->private;
571 struct vm_area_struct
*vma
= walk
->vma
;
574 /* FOLL_DUMP will return -EFAULT on huge zero page */
575 page
= follow_trans_huge_pmd(vma
, addr
, pmd
, FOLL_DUMP
);
576 if (IS_ERR_OR_NULL(page
))
579 mss
->anonymous_thp
+= HPAGE_PMD_SIZE
;
580 else if (PageSwapBacked(page
))
581 mss
->shmem_thp
+= HPAGE_PMD_SIZE
;
582 else if (is_zone_device_page(page
))
585 VM_BUG_ON_PAGE(1, page
);
586 smaps_account(mss
, page
, true, pmd_young(*pmd
), pmd_dirty(*pmd
));
589 static void smaps_pmd_entry(pmd_t
*pmd
, unsigned long addr
,
590 struct mm_walk
*walk
)
595 static int smaps_pte_range(pmd_t
*pmd
, unsigned long addr
, unsigned long end
,
596 struct mm_walk
*walk
)
598 struct vm_area_struct
*vma
= walk
->vma
;
602 ptl
= pmd_trans_huge_lock(pmd
, vma
);
604 smaps_pmd_entry(pmd
, addr
, walk
);
609 if (pmd_trans_unstable(pmd
))
612 * The mmap_sem held all the way back in m_start() is what
613 * keeps khugepaged out of here and from collapsing things
616 pte
= pte_offset_map_lock(vma
->vm_mm
, pmd
, addr
, &ptl
);
617 for (; addr
!= end
; pte
++, addr
+= PAGE_SIZE
)
618 smaps_pte_entry(pte
, addr
, walk
);
619 pte_unmap_unlock(pte
- 1, ptl
);
624 static void show_smap_vma_flags(struct seq_file
*m
, struct vm_area_struct
*vma
)
627 * Don't forget to update Documentation/ on changes.
629 static const char mnemonics
[BITS_PER_LONG
][2] = {
631 * In case if we meet a flag we don't know about.
633 [0 ... (BITS_PER_LONG
-1)] = "??",
635 [ilog2(VM_READ
)] = "rd",
636 [ilog2(VM_WRITE
)] = "wr",
637 [ilog2(VM_EXEC
)] = "ex",
638 [ilog2(VM_SHARED
)] = "sh",
639 [ilog2(VM_MAYREAD
)] = "mr",
640 [ilog2(VM_MAYWRITE
)] = "mw",
641 [ilog2(VM_MAYEXEC
)] = "me",
642 [ilog2(VM_MAYSHARE
)] = "ms",
643 [ilog2(VM_GROWSDOWN
)] = "gd",
644 [ilog2(VM_PFNMAP
)] = "pf",
645 [ilog2(VM_DENYWRITE
)] = "dw",
646 #ifdef CONFIG_X86_INTEL_MPX
647 [ilog2(VM_MPX
)] = "mp",
649 [ilog2(VM_LOCKED
)] = "lo",
650 [ilog2(VM_IO
)] = "io",
651 [ilog2(VM_SEQ_READ
)] = "sr",
652 [ilog2(VM_RAND_READ
)] = "rr",
653 [ilog2(VM_DONTCOPY
)] = "dc",
654 [ilog2(VM_DONTEXPAND
)] = "de",
655 [ilog2(VM_ACCOUNT
)] = "ac",
656 [ilog2(VM_NORESERVE
)] = "nr",
657 [ilog2(VM_HUGETLB
)] = "ht",
658 [ilog2(VM_ARCH_1
)] = "ar",
659 [ilog2(VM_DONTDUMP
)] = "dd",
660 #ifdef CONFIG_MEM_SOFT_DIRTY
661 [ilog2(VM_SOFTDIRTY
)] = "sd",
663 [ilog2(VM_MIXEDMAP
)] = "mm",
664 [ilog2(VM_HUGEPAGE
)] = "hg",
665 [ilog2(VM_NOHUGEPAGE
)] = "nh",
666 [ilog2(VM_MERGEABLE
)] = "mg",
667 [ilog2(VM_UFFD_MISSING
)]= "um",
668 [ilog2(VM_UFFD_WP
)] = "uw",
669 #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
670 /* These come out via ProtectionKey: */
671 [ilog2(VM_PKEY_BIT0
)] = "",
672 [ilog2(VM_PKEY_BIT1
)] = "",
673 [ilog2(VM_PKEY_BIT2
)] = "",
674 [ilog2(VM_PKEY_BIT3
)] = "",
679 seq_puts(m
, "VmFlags: ");
680 for (i
= 0; i
< BITS_PER_LONG
; i
++) {
681 if (!mnemonics
[i
][0])
683 if (vma
->vm_flags
& (1UL << i
)) {
684 seq_printf(m
, "%c%c ",
685 mnemonics
[i
][0], mnemonics
[i
][1]);
691 #ifdef CONFIG_HUGETLB_PAGE
692 static int smaps_hugetlb_range(pte_t
*pte
, unsigned long hmask
,
693 unsigned long addr
, unsigned long end
,
694 struct mm_walk
*walk
)
696 struct mem_size_stats
*mss
= walk
->private;
697 struct vm_area_struct
*vma
= walk
->vma
;
698 struct page
*page
= NULL
;
700 if (pte_present(*pte
)) {
701 page
= vm_normal_page(vma
, addr
, *pte
);
702 } else if (is_swap_pte(*pte
)) {
703 swp_entry_t swpent
= pte_to_swp_entry(*pte
);
705 if (is_migration_entry(swpent
))
706 page
= migration_entry_to_page(swpent
);
709 int mapcount
= page_mapcount(page
);
712 mss
->shared_hugetlb
+= huge_page_size(hstate_vma(vma
));
714 mss
->private_hugetlb
+= huge_page_size(hstate_vma(vma
));
718 #endif /* HUGETLB_PAGE */
720 void __weak
arch_show_smap(struct seq_file
*m
, struct vm_area_struct
*vma
)
724 static int show_smap(struct seq_file
*m
, void *v
, int is_pid
)
726 struct vm_area_struct
*vma
= v
;
727 struct mem_size_stats mss
;
728 struct mm_walk smaps_walk
= {
729 .pmd_entry
= smaps_pte_range
,
730 #ifdef CONFIG_HUGETLB_PAGE
731 .hugetlb_entry
= smaps_hugetlb_range
,
737 memset(&mss
, 0, sizeof mss
);
740 if (vma
->vm_file
&& shmem_mapping(vma
->vm_file
->f_mapping
)) {
742 * For shared or readonly shmem mappings we know that all
743 * swapped out pages belong to the shmem object, and we can
744 * obtain the swap value much more efficiently. For private
745 * writable mappings, we might have COW pages that are
746 * not affected by the parent swapped out pages of the shmem
747 * object, so we have to distinguish them during the page walk.
748 * Unless we know that the shmem object (or the part mapped by
749 * our VMA) has no swapped out pages at all.
751 unsigned long shmem_swapped
= shmem_swap_usage(vma
);
753 if (!shmem_swapped
|| (vma
->vm_flags
& VM_SHARED
) ||
754 !(vma
->vm_flags
& VM_WRITE
)) {
755 mss
.swap
= shmem_swapped
;
757 mss
.check_shmem_swap
= true;
758 smaps_walk
.pte_hole
= smaps_pte_hole
;
763 /* mmap_sem is held in m_start */
764 walk_page_vma(vma
, &smaps_walk
);
766 show_map_vma(m
, vma
, is_pid
);
772 "Shared_Clean: %8lu kB\n"
773 "Shared_Dirty: %8lu kB\n"
774 "Private_Clean: %8lu kB\n"
775 "Private_Dirty: %8lu kB\n"
776 "Referenced: %8lu kB\n"
777 "Anonymous: %8lu kB\n"
778 "LazyFree: %8lu kB\n"
779 "AnonHugePages: %8lu kB\n"
780 "ShmemPmdMapped: %8lu kB\n"
781 "Shared_Hugetlb: %8lu kB\n"
782 "Private_Hugetlb: %7lu kB\n"
785 "KernelPageSize: %8lu kB\n"
786 "MMUPageSize: %8lu kB\n"
788 (vma
->vm_end
- vma
->vm_start
) >> 10,
790 (unsigned long)(mss
.pss
>> (10 + PSS_SHIFT
)),
791 mss
.shared_clean
>> 10,
792 mss
.shared_dirty
>> 10,
793 mss
.private_clean
>> 10,
794 mss
.private_dirty
>> 10,
795 mss
.referenced
>> 10,
798 mss
.anonymous_thp
>> 10,
800 mss
.shared_hugetlb
>> 10,
801 mss
.private_hugetlb
>> 10,
803 (unsigned long)(mss
.swap_pss
>> (10 + PSS_SHIFT
)),
804 vma_kernel_pagesize(vma
) >> 10,
805 vma_mmu_pagesize(vma
) >> 10,
806 (vma
->vm_flags
& VM_LOCKED
) ?
807 (unsigned long)(mss
.pss
>> (10 + PSS_SHIFT
)) : 0);
809 arch_show_smap(m
, vma
);
810 show_smap_vma_flags(m
, vma
);
815 static int show_pid_smap(struct seq_file
*m
, void *v
)
817 return show_smap(m
, v
, 1);
820 static int show_tid_smap(struct seq_file
*m
, void *v
)
822 return show_smap(m
, v
, 0);
825 static const struct seq_operations proc_pid_smaps_op
= {
829 .show
= show_pid_smap
832 static const struct seq_operations proc_tid_smaps_op
= {
836 .show
= show_tid_smap
839 static int pid_smaps_open(struct inode
*inode
, struct file
*file
)
841 return do_maps_open(inode
, file
, &proc_pid_smaps_op
);
844 static int tid_smaps_open(struct inode
*inode
, struct file
*file
)
846 return do_maps_open(inode
, file
, &proc_tid_smaps_op
);
849 const struct file_operations proc_pid_smaps_operations
= {
850 .open
= pid_smaps_open
,
853 .release
= proc_map_release
,
856 const struct file_operations proc_tid_smaps_operations
= {
857 .open
= tid_smaps_open
,
860 .release
= proc_map_release
,
863 enum clear_refs_types
{
867 CLEAR_REFS_SOFT_DIRTY
,
868 CLEAR_REFS_MM_HIWATER_RSS
,
872 struct clear_refs_private
{
873 enum clear_refs_types type
;
876 #ifdef CONFIG_MEM_SOFT_DIRTY
877 static inline void clear_soft_dirty(struct vm_area_struct
*vma
,
878 unsigned long addr
, pte_t
*pte
)
881 * The soft-dirty tracker uses #PF-s to catch writes
882 * to pages, so write-protect the pte as well. See the
883 * Documentation/vm/soft-dirty.txt for full description
884 * of how soft-dirty works.
888 if (pte_present(ptent
)) {
889 ptent
= ptep_modify_prot_start(vma
->vm_mm
, addr
, pte
);
890 ptent
= pte_wrprotect(ptent
);
891 ptent
= pte_clear_soft_dirty(ptent
);
892 ptep_modify_prot_commit(vma
->vm_mm
, addr
, pte
, ptent
);
893 } else if (is_swap_pte(ptent
)) {
894 ptent
= pte_swp_clear_soft_dirty(ptent
);
895 set_pte_at(vma
->vm_mm
, addr
, pte
, ptent
);
899 static inline void clear_soft_dirty(struct vm_area_struct
*vma
,
900 unsigned long addr
, pte_t
*pte
)
905 #if defined(CONFIG_MEM_SOFT_DIRTY) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
906 static inline void clear_soft_dirty_pmd(struct vm_area_struct
*vma
,
907 unsigned long addr
, pmd_t
*pmdp
)
911 /* See comment in change_huge_pmd() */
912 pmdp_invalidate(vma
, addr
, pmdp
);
913 if (pmd_dirty(*pmdp
))
914 pmd
= pmd_mkdirty(pmd
);
915 if (pmd_young(*pmdp
))
916 pmd
= pmd_mkyoung(pmd
);
918 pmd
= pmd_wrprotect(pmd
);
919 pmd
= pmd_clear_soft_dirty(pmd
);
921 set_pmd_at(vma
->vm_mm
, addr
, pmdp
, pmd
);
924 static inline void clear_soft_dirty_pmd(struct vm_area_struct
*vma
,
925 unsigned long addr
, pmd_t
*pmdp
)
930 static int clear_refs_pte_range(pmd_t
*pmd
, unsigned long addr
,
931 unsigned long end
, struct mm_walk
*walk
)
933 struct clear_refs_private
*cp
= walk
->private;
934 struct vm_area_struct
*vma
= walk
->vma
;
939 ptl
= pmd_trans_huge_lock(pmd
, vma
);
941 if (cp
->type
== CLEAR_REFS_SOFT_DIRTY
) {
942 clear_soft_dirty_pmd(vma
, addr
, pmd
);
946 page
= pmd_page(*pmd
);
948 /* Clear accessed and referenced bits. */
949 pmdp_test_and_clear_young(vma
, addr
, pmd
);
950 test_and_clear_page_young(page
);
951 ClearPageReferenced(page
);
957 if (pmd_trans_unstable(pmd
))
960 pte
= pte_offset_map_lock(vma
->vm_mm
, pmd
, addr
, &ptl
);
961 for (; addr
!= end
; pte
++, addr
+= PAGE_SIZE
) {
964 if (cp
->type
== CLEAR_REFS_SOFT_DIRTY
) {
965 clear_soft_dirty(vma
, addr
, pte
);
969 if (!pte_present(ptent
))
972 page
= vm_normal_page(vma
, addr
, ptent
);
976 /* Clear accessed and referenced bits. */
977 ptep_test_and_clear_young(vma
, addr
, pte
);
978 test_and_clear_page_young(page
);
979 ClearPageReferenced(page
);
981 pte_unmap_unlock(pte
- 1, ptl
);
986 static int clear_refs_test_walk(unsigned long start
, unsigned long end
,
987 struct mm_walk
*walk
)
989 struct clear_refs_private
*cp
= walk
->private;
990 struct vm_area_struct
*vma
= walk
->vma
;
992 if (vma
->vm_flags
& VM_PFNMAP
)
996 * Writing 1 to /proc/pid/clear_refs affects all pages.
997 * Writing 2 to /proc/pid/clear_refs only affects anonymous pages.
998 * Writing 3 to /proc/pid/clear_refs only affects file mapped pages.
999 * Writing 4 to /proc/pid/clear_refs affects all pages.
1001 if (cp
->type
== CLEAR_REFS_ANON
&& vma
->vm_file
)
1003 if (cp
->type
== CLEAR_REFS_MAPPED
&& !vma
->vm_file
)
1008 static ssize_t
clear_refs_write(struct file
*file
, const char __user
*buf
,
1009 size_t count
, loff_t
*ppos
)
1011 struct task_struct
*task
;
1012 char buffer
[PROC_NUMBUF
];
1013 struct mm_struct
*mm
;
1014 struct vm_area_struct
*vma
;
1015 enum clear_refs_types type
;
1019 memset(buffer
, 0, sizeof(buffer
));
1020 if (count
> sizeof(buffer
) - 1)
1021 count
= sizeof(buffer
) - 1;
1022 if (copy_from_user(buffer
, buf
, count
))
1024 rv
= kstrtoint(strstrip(buffer
), 10, &itype
);
1027 type
= (enum clear_refs_types
)itype
;
1028 if (type
< CLEAR_REFS_ALL
|| type
>= CLEAR_REFS_LAST
)
1031 task
= get_proc_task(file_inode(file
));
1034 mm
= get_task_mm(task
);
1036 struct clear_refs_private cp
= {
1039 struct mm_walk clear_refs_walk
= {
1040 .pmd_entry
= clear_refs_pte_range
,
1041 .test_walk
= clear_refs_test_walk
,
1046 if (type
== CLEAR_REFS_MM_HIWATER_RSS
) {
1047 if (down_write_killable(&mm
->mmap_sem
)) {
1053 * Writing 5 to /proc/pid/clear_refs resets the peak
1054 * resident set size to this mm's current rss value.
1056 reset_mm_hiwater_rss(mm
);
1057 up_write(&mm
->mmap_sem
);
1061 down_read(&mm
->mmap_sem
);
1062 if (type
== CLEAR_REFS_SOFT_DIRTY
) {
1063 for (vma
= mm
->mmap
; vma
; vma
= vma
->vm_next
) {
1064 if (!(vma
->vm_flags
& VM_SOFTDIRTY
))
1066 up_read(&mm
->mmap_sem
);
1067 if (down_write_killable(&mm
->mmap_sem
)) {
1071 for (vma
= mm
->mmap
; vma
; vma
= vma
->vm_next
) {
1072 vma
->vm_flags
&= ~VM_SOFTDIRTY
;
1073 vma_set_page_prot(vma
);
1075 downgrade_write(&mm
->mmap_sem
);
1078 mmu_notifier_invalidate_range_start(mm
, 0, -1);
1080 walk_page_range(0, mm
->highest_vm_end
, &clear_refs_walk
);
1081 if (type
== CLEAR_REFS_SOFT_DIRTY
)
1082 mmu_notifier_invalidate_range_end(mm
, 0, -1);
1084 up_read(&mm
->mmap_sem
);
1088 put_task_struct(task
);
1093 const struct file_operations proc_clear_refs_operations
= {
1094 .write
= clear_refs_write
,
1095 .llseek
= noop_llseek
,
1102 struct pagemapread
{
1103 int pos
, len
; /* units: PM_ENTRY_BYTES, not bytes */
1104 pagemap_entry_t
*buffer
;
1108 #define PAGEMAP_WALK_SIZE (PMD_SIZE)
1109 #define PAGEMAP_WALK_MASK (PMD_MASK)
1111 #define PM_ENTRY_BYTES sizeof(pagemap_entry_t)
1112 #define PM_PFRAME_BITS 55
1113 #define PM_PFRAME_MASK GENMASK_ULL(PM_PFRAME_BITS - 1, 0)
1114 #define PM_SOFT_DIRTY BIT_ULL(55)
1115 #define PM_MMAP_EXCLUSIVE BIT_ULL(56)
1116 #define PM_FILE BIT_ULL(61)
1117 #define PM_SWAP BIT_ULL(62)
1118 #define PM_PRESENT BIT_ULL(63)
1120 #define PM_END_OF_BUFFER 1
1122 static inline pagemap_entry_t
make_pme(u64 frame
, u64 flags
)
1124 return (pagemap_entry_t
) { .pme
= (frame
& PM_PFRAME_MASK
) | flags
};
1127 static int add_to_pagemap(unsigned long addr
, pagemap_entry_t
*pme
,
1128 struct pagemapread
*pm
)
1130 pm
->buffer
[pm
->pos
++] = *pme
;
1131 if (pm
->pos
>= pm
->len
)
1132 return PM_END_OF_BUFFER
;
1136 static int pagemap_pte_hole(unsigned long start
, unsigned long end
,
1137 struct mm_walk
*walk
)
1139 struct pagemapread
*pm
= walk
->private;
1140 unsigned long addr
= start
;
1143 while (addr
< end
) {
1144 struct vm_area_struct
*vma
= find_vma(walk
->mm
, addr
);
1145 pagemap_entry_t pme
= make_pme(0, 0);
1146 /* End of address space hole, which we mark as non-present. */
1147 unsigned long hole_end
;
1150 hole_end
= min(end
, vma
->vm_start
);
1154 for (; addr
< hole_end
; addr
+= PAGE_SIZE
) {
1155 err
= add_to_pagemap(addr
, &pme
, pm
);
1163 /* Addresses in the VMA. */
1164 if (vma
->vm_flags
& VM_SOFTDIRTY
)
1165 pme
= make_pme(0, PM_SOFT_DIRTY
);
1166 for (; addr
< min(end
, vma
->vm_end
); addr
+= PAGE_SIZE
) {
1167 err
= add_to_pagemap(addr
, &pme
, pm
);
1176 static pagemap_entry_t
pte_to_pagemap_entry(struct pagemapread
*pm
,
1177 struct vm_area_struct
*vma
, unsigned long addr
, pte_t pte
)
1179 u64 frame
= 0, flags
= 0;
1180 struct page
*page
= NULL
;
1182 if (pte_present(pte
)) {
1184 frame
= pte_pfn(pte
);
1185 flags
|= PM_PRESENT
;
1186 page
= vm_normal_page(vma
, addr
, pte
);
1187 if (pte_soft_dirty(pte
))
1188 flags
|= PM_SOFT_DIRTY
;
1189 } else if (is_swap_pte(pte
)) {
1191 if (pte_swp_soft_dirty(pte
))
1192 flags
|= PM_SOFT_DIRTY
;
1193 entry
= pte_to_swp_entry(pte
);
1194 frame
= swp_type(entry
) |
1195 (swp_offset(entry
) << MAX_SWAPFILES_SHIFT
);
1197 if (is_migration_entry(entry
))
1198 page
= migration_entry_to_page(entry
);
1201 if (page
&& !PageAnon(page
))
1203 if (page
&& page_mapcount(page
) == 1)
1204 flags
|= PM_MMAP_EXCLUSIVE
;
1205 if (vma
->vm_flags
& VM_SOFTDIRTY
)
1206 flags
|= PM_SOFT_DIRTY
;
1208 return make_pme(frame
, flags
);
1211 static int pagemap_pmd_range(pmd_t
*pmdp
, unsigned long addr
, unsigned long end
,
1212 struct mm_walk
*walk
)
1214 struct vm_area_struct
*vma
= walk
->vma
;
1215 struct pagemapread
*pm
= walk
->private;
1217 pte_t
*pte
, *orig_pte
;
1220 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
1221 ptl
= pmd_trans_huge_lock(pmdp
, vma
);
1223 u64 flags
= 0, frame
= 0;
1226 if ((vma
->vm_flags
& VM_SOFTDIRTY
) || pmd_soft_dirty(pmd
))
1227 flags
|= PM_SOFT_DIRTY
;
1230 * Currently pmd for thp is always present because thp
1231 * can not be swapped-out, migrated, or HWPOISONed
1232 * (split in such cases instead.)
1233 * This if-check is just to prepare for future implementation.
1235 if (pmd_present(pmd
)) {
1236 struct page
*page
= pmd_page(pmd
);
1238 if (page_mapcount(page
) == 1)
1239 flags
|= PM_MMAP_EXCLUSIVE
;
1241 flags
|= PM_PRESENT
;
1243 frame
= pmd_pfn(pmd
) +
1244 ((addr
& ~PMD_MASK
) >> PAGE_SHIFT
);
1247 for (; addr
!= end
; addr
+= PAGE_SIZE
) {
1248 pagemap_entry_t pme
= make_pme(frame
, flags
);
1250 err
= add_to_pagemap(addr
, &pme
, pm
);
1253 if (pm
->show_pfn
&& (flags
& PM_PRESENT
))
1260 if (pmd_trans_unstable(pmdp
))
1262 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
1265 * We can assume that @vma always points to a valid one and @end never
1266 * goes beyond vma->vm_end.
1268 orig_pte
= pte
= pte_offset_map_lock(walk
->mm
, pmdp
, addr
, &ptl
);
1269 for (; addr
< end
; pte
++, addr
+= PAGE_SIZE
) {
1270 pagemap_entry_t pme
;
1272 pme
= pte_to_pagemap_entry(pm
, vma
, addr
, *pte
);
1273 err
= add_to_pagemap(addr
, &pme
, pm
);
1277 pte_unmap_unlock(orig_pte
, ptl
);
1284 #ifdef CONFIG_HUGETLB_PAGE
1285 /* This function walks within one hugetlb entry in the single call */
1286 static int pagemap_hugetlb_range(pte_t
*ptep
, unsigned long hmask
,
1287 unsigned long addr
, unsigned long end
,
1288 struct mm_walk
*walk
)
1290 struct pagemapread
*pm
= walk
->private;
1291 struct vm_area_struct
*vma
= walk
->vma
;
1292 u64 flags
= 0, frame
= 0;
1296 if (vma
->vm_flags
& VM_SOFTDIRTY
)
1297 flags
|= PM_SOFT_DIRTY
;
1299 pte
= huge_ptep_get(ptep
);
1300 if (pte_present(pte
)) {
1301 struct page
*page
= pte_page(pte
);
1303 if (!PageAnon(page
))
1306 if (page_mapcount(page
) == 1)
1307 flags
|= PM_MMAP_EXCLUSIVE
;
1309 flags
|= PM_PRESENT
;
1311 frame
= pte_pfn(pte
) +
1312 ((addr
& ~hmask
) >> PAGE_SHIFT
);
1315 for (; addr
!= end
; addr
+= PAGE_SIZE
) {
1316 pagemap_entry_t pme
= make_pme(frame
, flags
);
1318 err
= add_to_pagemap(addr
, &pme
, pm
);
1321 if (pm
->show_pfn
&& (flags
& PM_PRESENT
))
1329 #endif /* HUGETLB_PAGE */
1332 * /proc/pid/pagemap - an array mapping virtual pages to pfns
1334 * For each page in the address space, this file contains one 64-bit entry
1335 * consisting of the following:
1337 * Bits 0-54 page frame number (PFN) if present
1338 * Bits 0-4 swap type if swapped
1339 * Bits 5-54 swap offset if swapped
1340 * Bit 55 pte is soft-dirty (see Documentation/vm/soft-dirty.txt)
1341 * Bit 56 page exclusively mapped
1343 * Bit 61 page is file-page or shared-anon
1344 * Bit 62 page swapped
1345 * Bit 63 page present
1347 * If the page is not present but in swap, then the PFN contains an
1348 * encoding of the swap file number and the page's offset into the
1349 * swap. Unmapped pages return a null PFN. This allows determining
1350 * precisely which pages are mapped (or in swap) and comparing mapped
1351 * pages between processes.
1353 * Efficient users of this interface will use /proc/pid/maps to
1354 * determine which areas of memory are actually mapped and llseek to
1355 * skip over unmapped regions.
1357 static ssize_t
pagemap_read(struct file
*file
, char __user
*buf
,
1358 size_t count
, loff_t
*ppos
)
1360 struct mm_struct
*mm
= file
->private_data
;
1361 struct pagemapread pm
;
1362 struct mm_walk pagemap_walk
= {};
1364 unsigned long svpfn
;
1365 unsigned long start_vaddr
;
1366 unsigned long end_vaddr
;
1367 int ret
= 0, copied
= 0;
1369 if (!mm
|| !mmget_not_zero(mm
))
1373 /* file position must be aligned */
1374 if ((*ppos
% PM_ENTRY_BYTES
) || (count
% PM_ENTRY_BYTES
))
1381 /* do not disclose physical addresses: attack vector */
1382 pm
.show_pfn
= file_ns_capable(file
, &init_user_ns
, CAP_SYS_ADMIN
);
1384 pm
.len
= (PAGEMAP_WALK_SIZE
>> PAGE_SHIFT
);
1385 pm
.buffer
= kmalloc(pm
.len
* PM_ENTRY_BYTES
, GFP_TEMPORARY
);
1390 pagemap_walk
.pmd_entry
= pagemap_pmd_range
;
1391 pagemap_walk
.pte_hole
= pagemap_pte_hole
;
1392 #ifdef CONFIG_HUGETLB_PAGE
1393 pagemap_walk
.hugetlb_entry
= pagemap_hugetlb_range
;
1395 pagemap_walk
.mm
= mm
;
1396 pagemap_walk
.private = &pm
;
1399 svpfn
= src
/ PM_ENTRY_BYTES
;
1400 start_vaddr
= svpfn
<< PAGE_SHIFT
;
1401 end_vaddr
= mm
->task_size
;
1403 /* watch out for wraparound */
1404 if (svpfn
> mm
->task_size
>> PAGE_SHIFT
)
1405 start_vaddr
= end_vaddr
;
1408 * The odds are that this will stop walking way
1409 * before end_vaddr, because the length of the
1410 * user buffer is tracked in "pm", and the walk
1411 * will stop when we hit the end of the buffer.
1414 while (count
&& (start_vaddr
< end_vaddr
)) {
1419 end
= (start_vaddr
+ PAGEMAP_WALK_SIZE
) & PAGEMAP_WALK_MASK
;
1421 if (end
< start_vaddr
|| end
> end_vaddr
)
1423 down_read(&mm
->mmap_sem
);
1424 ret
= walk_page_range(start_vaddr
, end
, &pagemap_walk
);
1425 up_read(&mm
->mmap_sem
);
1428 len
= min(count
, PM_ENTRY_BYTES
* pm
.pos
);
1429 if (copy_to_user(buf
, pm
.buffer
, len
)) {
1438 if (!ret
|| ret
== PM_END_OF_BUFFER
)
1449 static int pagemap_open(struct inode
*inode
, struct file
*file
)
1451 struct mm_struct
*mm
;
1453 mm
= proc_mem_open(inode
, PTRACE_MODE_READ
);
1456 file
->private_data
= mm
;
1460 static int pagemap_release(struct inode
*inode
, struct file
*file
)
1462 struct mm_struct
*mm
= file
->private_data
;
1469 const struct file_operations proc_pagemap_operations
= {
1470 .llseek
= mem_lseek
, /* borrow this */
1471 .read
= pagemap_read
,
1472 .open
= pagemap_open
,
1473 .release
= pagemap_release
,
1475 #endif /* CONFIG_PROC_PAGE_MONITOR */
1480 unsigned long pages
;
1482 unsigned long active
;
1483 unsigned long writeback
;
1484 unsigned long mapcount_max
;
1485 unsigned long dirty
;
1486 unsigned long swapcache
;
1487 unsigned long node
[MAX_NUMNODES
];
1490 struct numa_maps_private
{
1491 struct proc_maps_private proc_maps
;
1492 struct numa_maps md
;
1495 static void gather_stats(struct page
*page
, struct numa_maps
*md
, int pte_dirty
,
1496 unsigned long nr_pages
)
1498 int count
= page_mapcount(page
);
1500 md
->pages
+= nr_pages
;
1501 if (pte_dirty
|| PageDirty(page
))
1502 md
->dirty
+= nr_pages
;
1504 if (PageSwapCache(page
))
1505 md
->swapcache
+= nr_pages
;
1507 if (PageActive(page
) || PageUnevictable(page
))
1508 md
->active
+= nr_pages
;
1510 if (PageWriteback(page
))
1511 md
->writeback
+= nr_pages
;
1514 md
->anon
+= nr_pages
;
1516 if (count
> md
->mapcount_max
)
1517 md
->mapcount_max
= count
;
1519 md
->node
[page_to_nid(page
)] += nr_pages
;
1522 static struct page
*can_gather_numa_stats(pte_t pte
, struct vm_area_struct
*vma
,
1528 if (!pte_present(pte
))
1531 page
= vm_normal_page(vma
, addr
, pte
);
1535 if (PageReserved(page
))
1538 nid
= page_to_nid(page
);
1539 if (!node_isset(nid
, node_states
[N_MEMORY
]))
1545 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
1546 static struct page
*can_gather_numa_stats_pmd(pmd_t pmd
,
1547 struct vm_area_struct
*vma
,
1553 if (!pmd_present(pmd
))
1556 page
= vm_normal_page_pmd(vma
, addr
, pmd
);
1560 if (PageReserved(page
))
1563 nid
= page_to_nid(page
);
1564 if (!node_isset(nid
, node_states
[N_MEMORY
]))
1571 static int gather_pte_stats(pmd_t
*pmd
, unsigned long addr
,
1572 unsigned long end
, struct mm_walk
*walk
)
1574 struct numa_maps
*md
= walk
->private;
1575 struct vm_area_struct
*vma
= walk
->vma
;
1580 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
1581 ptl
= pmd_trans_huge_lock(pmd
, vma
);
1585 page
= can_gather_numa_stats_pmd(*pmd
, vma
, addr
);
1587 gather_stats(page
, md
, pmd_dirty(*pmd
),
1588 HPAGE_PMD_SIZE
/PAGE_SIZE
);
1593 if (pmd_trans_unstable(pmd
))
1596 orig_pte
= pte
= pte_offset_map_lock(walk
->mm
, pmd
, addr
, &ptl
);
1598 struct page
*page
= can_gather_numa_stats(*pte
, vma
, addr
);
1601 gather_stats(page
, md
, pte_dirty(*pte
), 1);
1603 } while (pte
++, addr
+= PAGE_SIZE
, addr
!= end
);
1604 pte_unmap_unlock(orig_pte
, ptl
);
1608 #ifdef CONFIG_HUGETLB_PAGE
1609 static int gather_hugetlb_stats(pte_t
*pte
, unsigned long hmask
,
1610 unsigned long addr
, unsigned long end
, struct mm_walk
*walk
)
1612 pte_t huge_pte
= huge_ptep_get(pte
);
1613 struct numa_maps
*md
;
1616 if (!pte_present(huge_pte
))
1619 page
= pte_page(huge_pte
);
1624 gather_stats(page
, md
, pte_dirty(huge_pte
), 1);
1629 static int gather_hugetlb_stats(pte_t
*pte
, unsigned long hmask
,
1630 unsigned long addr
, unsigned long end
, struct mm_walk
*walk
)
1637 * Display pages allocated per node and memory policy via /proc.
1639 static int show_numa_map(struct seq_file
*m
, void *v
, int is_pid
)
1641 struct numa_maps_private
*numa_priv
= m
->private;
1642 struct proc_maps_private
*proc_priv
= &numa_priv
->proc_maps
;
1643 struct vm_area_struct
*vma
= v
;
1644 struct numa_maps
*md
= &numa_priv
->md
;
1645 struct file
*file
= vma
->vm_file
;
1646 struct mm_struct
*mm
= vma
->vm_mm
;
1647 struct mm_walk walk
= {
1648 .hugetlb_entry
= gather_hugetlb_stats
,
1649 .pmd_entry
= gather_pte_stats
,
1653 struct mempolicy
*pol
;
1660 /* Ensure we start with an empty set of numa_maps statistics. */
1661 memset(md
, 0, sizeof(*md
));
1663 pol
= __get_vma_policy(vma
, vma
->vm_start
);
1665 mpol_to_str(buffer
, sizeof(buffer
), pol
);
1668 mpol_to_str(buffer
, sizeof(buffer
), proc_priv
->task_mempolicy
);
1671 seq_printf(m
, "%08lx %s", vma
->vm_start
, buffer
);
1674 seq_puts(m
, " file=");
1675 seq_file_path(m
, file
, "\n\t= ");
1676 } else if (vma
->vm_start
<= mm
->brk
&& vma
->vm_end
>= mm
->start_brk
) {
1677 seq_puts(m
, " heap");
1678 } else if (is_stack(proc_priv
, vma
)) {
1679 seq_puts(m
, " stack");
1682 if (is_vm_hugetlb_page(vma
))
1683 seq_puts(m
, " huge");
1685 /* mmap_sem is held by m_start */
1686 walk_page_vma(vma
, &walk
);
1692 seq_printf(m
, " anon=%lu", md
->anon
);
1695 seq_printf(m
, " dirty=%lu", md
->dirty
);
1697 if (md
->pages
!= md
->anon
&& md
->pages
!= md
->dirty
)
1698 seq_printf(m
, " mapped=%lu", md
->pages
);
1700 if (md
->mapcount_max
> 1)
1701 seq_printf(m
, " mapmax=%lu", md
->mapcount_max
);
1704 seq_printf(m
, " swapcache=%lu", md
->swapcache
);
1706 if (md
->active
< md
->pages
&& !is_vm_hugetlb_page(vma
))
1707 seq_printf(m
, " active=%lu", md
->active
);
1710 seq_printf(m
, " writeback=%lu", md
->writeback
);
1712 for_each_node_state(nid
, N_MEMORY
)
1714 seq_printf(m
, " N%d=%lu", nid
, md
->node
[nid
]);
1716 seq_printf(m
, " kernelpagesize_kB=%lu", vma_kernel_pagesize(vma
) >> 10);
1719 m_cache_vma(m
, vma
);
1723 static int show_pid_numa_map(struct seq_file
*m
, void *v
)
1725 return show_numa_map(m
, v
, 1);
1728 static int show_tid_numa_map(struct seq_file
*m
, void *v
)
1730 return show_numa_map(m
, v
, 0);
1733 static const struct seq_operations proc_pid_numa_maps_op
= {
1737 .show
= show_pid_numa_map
,
1740 static const struct seq_operations proc_tid_numa_maps_op
= {
1744 .show
= show_tid_numa_map
,
1747 static int numa_maps_open(struct inode
*inode
, struct file
*file
,
1748 const struct seq_operations
*ops
)
1750 return proc_maps_open(inode
, file
, ops
,
1751 sizeof(struct numa_maps_private
));
1754 static int pid_numa_maps_open(struct inode
*inode
, struct file
*file
)
1756 return numa_maps_open(inode
, file
, &proc_pid_numa_maps_op
);
1759 static int tid_numa_maps_open(struct inode
*inode
, struct file
*file
)
1761 return numa_maps_open(inode
, file
, &proc_tid_numa_maps_op
);
1764 const struct file_operations proc_pid_numa_maps_operations
= {
1765 .open
= pid_numa_maps_open
,
1767 .llseek
= seq_lseek
,
1768 .release
= proc_map_release
,
1771 const struct file_operations proc_tid_numa_maps_operations
= {
1772 .open
= tid_numa_maps_open
,
1774 .llseek
= seq_lseek
,
1775 .release
= proc_map_release
,
1777 #endif /* CONFIG_NUMA */