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>
19 #include <asm/uaccess.h>
20 #include <asm/tlbflush.h>
23 void task_mem(struct seq_file
*m
, struct mm_struct
*mm
)
25 unsigned long data
, text
, lib
, swap
, ptes
, pmds
;
26 unsigned long hiwater_vm
, total_vm
, hiwater_rss
, total_rss
;
29 * Note: to minimize their overhead, mm maintains hiwater_vm and
30 * hiwater_rss only when about to *lower* total_vm or rss. Any
31 * collector of these hiwater stats must therefore get total_vm
32 * and rss too, which will usually be the higher. Barriers? not
33 * worth the effort, such snapshots can always be inconsistent.
35 hiwater_vm
= total_vm
= mm
->total_vm
;
36 if (hiwater_vm
< mm
->hiwater_vm
)
37 hiwater_vm
= mm
->hiwater_vm
;
38 hiwater_rss
= total_rss
= get_mm_rss(mm
);
39 if (hiwater_rss
< mm
->hiwater_rss
)
40 hiwater_rss
= mm
->hiwater_rss
;
42 data
= mm
->total_vm
- mm
->shared_vm
- mm
->stack_vm
;
43 text
= (PAGE_ALIGN(mm
->end_code
) - (mm
->start_code
& PAGE_MASK
)) >> 10;
44 lib
= (mm
->exec_vm
<< (PAGE_SHIFT
-10)) - text
;
45 swap
= get_mm_counter(mm
, MM_SWAPENTS
);
46 ptes
= PTRS_PER_PTE
* sizeof(pte_t
) * atomic_long_read(&mm
->nr_ptes
);
47 pmds
= PTRS_PER_PMD
* sizeof(pmd_t
) * mm_nr_pmds(mm
);
62 hiwater_vm
<< (PAGE_SHIFT
-10),
63 total_vm
<< (PAGE_SHIFT
-10),
64 mm
->locked_vm
<< (PAGE_SHIFT
-10),
65 mm
->pinned_vm
<< (PAGE_SHIFT
-10),
66 hiwater_rss
<< (PAGE_SHIFT
-10),
67 total_rss
<< (PAGE_SHIFT
-10),
68 data
<< (PAGE_SHIFT
-10),
69 mm
->stack_vm
<< (PAGE_SHIFT
-10), text
, lib
,
72 swap
<< (PAGE_SHIFT
-10));
73 hugetlb_report_usage(m
, mm
);
76 unsigned long task_vsize(struct mm_struct
*mm
)
78 return PAGE_SIZE
* mm
->total_vm
;
81 unsigned long task_statm(struct mm_struct
*mm
,
82 unsigned long *shared
, unsigned long *text
,
83 unsigned long *data
, unsigned long *resident
)
85 *shared
= get_mm_counter(mm
, MM_FILEPAGES
);
86 *text
= (PAGE_ALIGN(mm
->end_code
) - (mm
->start_code
& PAGE_MASK
))
88 *data
= mm
->total_vm
- mm
->shared_vm
;
89 *resident
= *shared
+ get_mm_counter(mm
, MM_ANONPAGES
);
95 * Save get_task_policy() for show_numa_map().
97 static void hold_task_mempolicy(struct proc_maps_private
*priv
)
99 struct task_struct
*task
= priv
->task
;
102 priv
->task_mempolicy
= get_task_policy(task
);
103 mpol_get(priv
->task_mempolicy
);
106 static void release_task_mempolicy(struct proc_maps_private
*priv
)
108 mpol_put(priv
->task_mempolicy
);
111 static void hold_task_mempolicy(struct proc_maps_private
*priv
)
114 static void release_task_mempolicy(struct proc_maps_private
*priv
)
119 static void vma_stop(struct proc_maps_private
*priv
)
121 struct mm_struct
*mm
= priv
->mm
;
123 release_task_mempolicy(priv
);
124 up_read(&mm
->mmap_sem
);
128 static struct vm_area_struct
*
129 m_next_vma(struct proc_maps_private
*priv
, struct vm_area_struct
*vma
)
131 if (vma
== priv
->tail_vma
)
133 return vma
->vm_next
?: priv
->tail_vma
;
136 static void m_cache_vma(struct seq_file
*m
, struct vm_area_struct
*vma
)
138 if (m
->count
< m
->size
) /* vma is copied successfully */
139 m
->version
= m_next_vma(m
->private, vma
) ? vma
->vm_start
: -1UL;
142 static void *m_start(struct seq_file
*m
, loff_t
*ppos
)
144 struct proc_maps_private
*priv
= m
->private;
145 unsigned long last_addr
= m
->version
;
146 struct mm_struct
*mm
;
147 struct vm_area_struct
*vma
;
148 unsigned int pos
= *ppos
;
150 /* See m_cache_vma(). Zero at the start or after lseek. */
151 if (last_addr
== -1UL)
154 priv
->task
= get_proc_task(priv
->inode
);
156 return ERR_PTR(-ESRCH
);
159 if (!mm
|| !atomic_inc_not_zero(&mm
->mm_users
))
162 down_read(&mm
->mmap_sem
);
163 hold_task_mempolicy(priv
);
164 priv
->tail_vma
= get_gate_vma(mm
);
167 vma
= find_vma(mm
, last_addr
);
168 if (vma
&& (vma
= m_next_vma(priv
, vma
)))
173 if (pos
< mm
->map_count
) {
174 for (vma
= mm
->mmap
; pos
; pos
--) {
175 m
->version
= vma
->vm_start
;
181 /* we do not bother to update m->version in this case */
182 if (pos
== mm
->map_count
&& priv
->tail_vma
)
183 return priv
->tail_vma
;
189 static void *m_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
191 struct proc_maps_private
*priv
= m
->private;
192 struct vm_area_struct
*next
;
195 next
= m_next_vma(priv
, v
);
201 static void m_stop(struct seq_file
*m
, void *v
)
203 struct proc_maps_private
*priv
= m
->private;
205 if (!IS_ERR_OR_NULL(v
))
208 put_task_struct(priv
->task
);
213 static int proc_maps_open(struct inode
*inode
, struct file
*file
,
214 const struct seq_operations
*ops
, int psize
)
216 struct proc_maps_private
*priv
= __seq_open_private(file
, ops
, psize
);
222 priv
->mm
= proc_mem_open(inode
, PTRACE_MODE_READ
);
223 if (IS_ERR(priv
->mm
)) {
224 int err
= PTR_ERR(priv
->mm
);
226 seq_release_private(inode
, file
);
233 static int proc_map_release(struct inode
*inode
, struct file
*file
)
235 struct seq_file
*seq
= file
->private_data
;
236 struct proc_maps_private
*priv
= seq
->private;
241 return seq_release_private(inode
, file
);
244 static int do_maps_open(struct inode
*inode
, struct file
*file
,
245 const struct seq_operations
*ops
)
247 return proc_maps_open(inode
, file
, ops
,
248 sizeof(struct proc_maps_private
));
251 static pid_t
pid_of_stack(struct proc_maps_private
*priv
,
252 struct vm_area_struct
*vma
, bool is_pid
)
254 struct inode
*inode
= priv
->inode
;
255 struct task_struct
*task
;
259 task
= pid_task(proc_pid(inode
), PIDTYPE_PID
);
261 task
= task_of_stack(task
, vma
, is_pid
);
263 ret
= task_pid_nr_ns(task
, inode
->i_sb
->s_fs_info
);
271 show_map_vma(struct seq_file
*m
, struct vm_area_struct
*vma
, int is_pid
)
273 struct mm_struct
*mm
= vma
->vm_mm
;
274 struct file
*file
= vma
->vm_file
;
275 struct proc_maps_private
*priv
= m
->private;
276 vm_flags_t flags
= vma
->vm_flags
;
277 unsigned long ino
= 0;
278 unsigned long long pgoff
= 0;
279 unsigned long start
, end
;
281 const char *name
= NULL
;
284 struct inode
*inode
= file_inode(vma
->vm_file
);
285 dev
= inode
->i_sb
->s_dev
;
287 pgoff
= ((loff_t
)vma
->vm_pgoff
) << PAGE_SHIFT
;
290 /* We don't show the stack guard page in /proc/maps */
291 start
= vma
->vm_start
;
292 if (stack_guard_page_start(vma
, start
))
295 if (stack_guard_page_end(vma
, end
))
298 seq_setwidth(m
, 25 + sizeof(void *) * 6 - 1);
299 seq_printf(m
, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu ",
302 flags
& VM_READ
? 'r' : '-',
303 flags
& VM_WRITE
? 'w' : '-',
304 flags
& VM_EXEC
? 'x' : '-',
305 flags
& VM_MAYSHARE
? 's' : 'p',
307 MAJOR(dev
), MINOR(dev
), ino
);
310 * Print the dentry name for named mappings, and a
311 * special [heap] marker for the heap:
315 seq_file_path(m
, file
, "\n");
319 if (vma
->vm_ops
&& vma
->vm_ops
->name
) {
320 name
= vma
->vm_ops
->name(vma
);
325 name
= arch_vma_name(vma
);
334 if (vma
->vm_start
<= mm
->brk
&&
335 vma
->vm_end
>= mm
->start_brk
) {
340 tid
= pid_of_stack(priv
, vma
, is_pid
);
343 * Thread stack in /proc/PID/task/TID/maps or
344 * the main process stack.
346 if (!is_pid
|| (vma
->vm_start
<= mm
->start_stack
&&
347 vma
->vm_end
>= mm
->start_stack
)) {
350 /* Thread stack in /proc/PID/maps */
352 seq_printf(m
, "[stack:%d]", tid
);
365 static int show_map(struct seq_file
*m
, void *v
, int is_pid
)
367 show_map_vma(m
, v
, is_pid
);
372 static int show_pid_map(struct seq_file
*m
, void *v
)
374 return show_map(m
, v
, 1);
377 static int show_tid_map(struct seq_file
*m
, void *v
)
379 return show_map(m
, v
, 0);
382 static const struct seq_operations proc_pid_maps_op
= {
389 static const struct seq_operations proc_tid_maps_op
= {
396 static int pid_maps_open(struct inode
*inode
, struct file
*file
)
398 return do_maps_open(inode
, file
, &proc_pid_maps_op
);
401 static int tid_maps_open(struct inode
*inode
, struct file
*file
)
403 return do_maps_open(inode
, file
, &proc_tid_maps_op
);
406 const struct file_operations proc_pid_maps_operations
= {
407 .open
= pid_maps_open
,
410 .release
= proc_map_release
,
413 const struct file_operations proc_tid_maps_operations
= {
414 .open
= tid_maps_open
,
417 .release
= proc_map_release
,
421 * Proportional Set Size(PSS): my share of RSS.
423 * PSS of a process is the count of pages it has in memory, where each
424 * page is divided by the number of processes sharing it. So if a
425 * process has 1000 pages all to itself, and 1000 shared with one other
426 * process, its PSS will be 1500.
428 * To keep (accumulated) division errors low, we adopt a 64bit
429 * fixed-point pss counter to minimize division errors. So (pss >>
430 * PSS_SHIFT) would be the real byte count.
432 * A shift of 12 before division means (assuming 4K page size):
433 * - 1M 3-user-pages add up to 8KB errors;
434 * - supports mapcount up to 2^24, or 16M;
435 * - supports PSS up to 2^52 bytes, or 4PB.
439 #ifdef CONFIG_PROC_PAGE_MONITOR
440 struct mem_size_stats
{
441 unsigned long resident
;
442 unsigned long shared_clean
;
443 unsigned long shared_dirty
;
444 unsigned long private_clean
;
445 unsigned long private_dirty
;
446 unsigned long referenced
;
447 unsigned long anonymous
;
448 unsigned long anonymous_thp
;
450 unsigned long shared_hugetlb
;
451 unsigned long private_hugetlb
;
454 bool check_shmem_swap
;
457 static void smaps_account(struct mem_size_stats
*mss
, struct page
*page
,
458 unsigned long size
, bool young
, bool dirty
)
463 mss
->anonymous
+= size
;
465 mss
->resident
+= size
;
466 /* Accumulate the size in pages that have been accessed. */
467 if (young
|| page_is_young(page
) || PageReferenced(page
))
468 mss
->referenced
+= size
;
469 mapcount
= page_mapcount(page
);
473 if (dirty
|| PageDirty(page
))
474 mss
->shared_dirty
+= size
;
476 mss
->shared_clean
+= size
;
477 pss_delta
= (u64
)size
<< PSS_SHIFT
;
478 do_div(pss_delta
, mapcount
);
479 mss
->pss
+= pss_delta
;
481 if (dirty
|| PageDirty(page
))
482 mss
->private_dirty
+= size
;
484 mss
->private_clean
+= size
;
485 mss
->pss
+= (u64
)size
<< PSS_SHIFT
;
490 static unsigned long smaps_shmem_swap(struct vm_area_struct
*vma
,
495 page
= find_get_entry(vma
->vm_file
->f_mapping
,
496 linear_page_index(vma
, addr
));
500 if (radix_tree_exceptional_entry(page
))
503 page_cache_release(page
);
508 static int smaps_pte_hole(unsigned long addr
, unsigned long end
,
509 struct mm_walk
*walk
)
511 struct mem_size_stats
*mss
= walk
->private;
514 mss
->swap
+= smaps_shmem_swap(walk
->vma
, addr
);
521 static unsigned long smaps_shmem_swap(struct vm_area_struct
*vma
,
528 static void smaps_pte_entry(pte_t
*pte
, unsigned long addr
,
529 struct mm_walk
*walk
)
531 struct mem_size_stats
*mss
= walk
->private;
532 struct vm_area_struct
*vma
= walk
->vma
;
533 struct page
*page
= NULL
;
535 if (pte_present(*pte
)) {
536 page
= vm_normal_page(vma
, addr
, *pte
);
537 } else if (is_swap_pte(*pte
)) {
538 swp_entry_t swpent
= pte_to_swp_entry(*pte
);
540 if (!non_swap_entry(swpent
)) {
543 mss
->swap
+= PAGE_SIZE
;
544 mapcount
= swp_swapcount(swpent
);
546 u64 pss_delta
= (u64
)PAGE_SIZE
<< PSS_SHIFT
;
548 do_div(pss_delta
, mapcount
);
549 mss
->swap_pss
+= pss_delta
;
551 mss
->swap_pss
+= (u64
)PAGE_SIZE
<< PSS_SHIFT
;
553 } else if (is_migration_entry(swpent
))
554 page
= migration_entry_to_page(swpent
);
555 } else if (unlikely(IS_ENABLED(CONFIG_SHMEM
) && mss
->check_shmem_swap
556 && pte_none(*pte
))) {
557 mss
->swap
+= smaps_shmem_swap(vma
, addr
);
562 smaps_account(mss
, page
, PAGE_SIZE
, pte_young(*pte
), pte_dirty(*pte
));
565 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
566 static void smaps_pmd_entry(pmd_t
*pmd
, unsigned long addr
,
567 struct mm_walk
*walk
)
569 struct mem_size_stats
*mss
= walk
->private;
570 struct vm_area_struct
*vma
= walk
->vma
;
573 /* FOLL_DUMP will return -EFAULT on huge zero page */
574 page
= follow_trans_huge_pmd(vma
, addr
, pmd
, FOLL_DUMP
);
575 if (IS_ERR_OR_NULL(page
))
577 mss
->anonymous_thp
+= HPAGE_PMD_SIZE
;
578 smaps_account(mss
, page
, HPAGE_PMD_SIZE
,
579 pmd_young(*pmd
), pmd_dirty(*pmd
));
582 static void smaps_pmd_entry(pmd_t
*pmd
, unsigned long addr
,
583 struct mm_walk
*walk
)
588 static int smaps_pte_range(pmd_t
*pmd
, unsigned long addr
, unsigned long end
,
589 struct mm_walk
*walk
)
591 struct vm_area_struct
*vma
= walk
->vma
;
595 if (pmd_trans_huge_lock(pmd
, vma
, &ptl
) == 1) {
596 smaps_pmd_entry(pmd
, addr
, walk
);
601 if (pmd_trans_unstable(pmd
))
604 * The mmap_sem held all the way back in m_start() is what
605 * keeps khugepaged out of here and from collapsing things
608 pte
= pte_offset_map_lock(vma
->vm_mm
, pmd
, addr
, &ptl
);
609 for (; addr
!= end
; pte
++, addr
+= PAGE_SIZE
)
610 smaps_pte_entry(pte
, addr
, walk
);
611 pte_unmap_unlock(pte
- 1, ptl
);
616 static void show_smap_vma_flags(struct seq_file
*m
, struct vm_area_struct
*vma
)
619 * Don't forget to update Documentation/ on changes.
621 static const char mnemonics
[BITS_PER_LONG
][2] = {
623 * In case if we meet a flag we don't know about.
625 [0 ... (BITS_PER_LONG
-1)] = "??",
627 [ilog2(VM_READ
)] = "rd",
628 [ilog2(VM_WRITE
)] = "wr",
629 [ilog2(VM_EXEC
)] = "ex",
630 [ilog2(VM_SHARED
)] = "sh",
631 [ilog2(VM_MAYREAD
)] = "mr",
632 [ilog2(VM_MAYWRITE
)] = "mw",
633 [ilog2(VM_MAYEXEC
)] = "me",
634 [ilog2(VM_MAYSHARE
)] = "ms",
635 [ilog2(VM_GROWSDOWN
)] = "gd",
636 [ilog2(VM_PFNMAP
)] = "pf",
637 [ilog2(VM_DENYWRITE
)] = "dw",
638 #ifdef CONFIG_X86_INTEL_MPX
639 [ilog2(VM_MPX
)] = "mp",
641 [ilog2(VM_LOCKED
)] = "lo",
642 [ilog2(VM_IO
)] = "io",
643 [ilog2(VM_SEQ_READ
)] = "sr",
644 [ilog2(VM_RAND_READ
)] = "rr",
645 [ilog2(VM_DONTCOPY
)] = "dc",
646 [ilog2(VM_DONTEXPAND
)] = "de",
647 [ilog2(VM_ACCOUNT
)] = "ac",
648 [ilog2(VM_NORESERVE
)] = "nr",
649 [ilog2(VM_HUGETLB
)] = "ht",
650 [ilog2(VM_ARCH_1
)] = "ar",
651 [ilog2(VM_DONTDUMP
)] = "dd",
652 #ifdef CONFIG_MEM_SOFT_DIRTY
653 [ilog2(VM_SOFTDIRTY
)] = "sd",
655 [ilog2(VM_MIXEDMAP
)] = "mm",
656 [ilog2(VM_HUGEPAGE
)] = "hg",
657 [ilog2(VM_NOHUGEPAGE
)] = "nh",
658 [ilog2(VM_MERGEABLE
)] = "mg",
659 [ilog2(VM_UFFD_MISSING
)]= "um",
660 [ilog2(VM_UFFD_WP
)] = "uw",
664 seq_puts(m
, "VmFlags: ");
665 for (i
= 0; i
< BITS_PER_LONG
; i
++) {
666 if (vma
->vm_flags
& (1UL << i
)) {
667 seq_printf(m
, "%c%c ",
668 mnemonics
[i
][0], mnemonics
[i
][1]);
674 #ifdef CONFIG_HUGETLB_PAGE
675 static int smaps_hugetlb_range(pte_t
*pte
, unsigned long hmask
,
676 unsigned long addr
, unsigned long end
,
677 struct mm_walk
*walk
)
679 struct mem_size_stats
*mss
= walk
->private;
680 struct vm_area_struct
*vma
= walk
->vma
;
681 struct page
*page
= NULL
;
683 if (pte_present(*pte
)) {
684 page
= vm_normal_page(vma
, addr
, *pte
);
685 } else if (is_swap_pte(*pte
)) {
686 swp_entry_t swpent
= pte_to_swp_entry(*pte
);
688 if (is_migration_entry(swpent
))
689 page
= migration_entry_to_page(swpent
);
692 int mapcount
= page_mapcount(page
);
695 mss
->shared_hugetlb
+= huge_page_size(hstate_vma(vma
));
697 mss
->private_hugetlb
+= huge_page_size(hstate_vma(vma
));
701 #endif /* HUGETLB_PAGE */
703 static int show_smap(struct seq_file
*m
, void *v
, int is_pid
)
705 struct vm_area_struct
*vma
= v
;
706 struct mem_size_stats mss
;
707 struct mm_walk smaps_walk
= {
708 .pmd_entry
= smaps_pte_range
,
709 #ifdef CONFIG_HUGETLB_PAGE
710 .hugetlb_entry
= smaps_hugetlb_range
,
716 memset(&mss
, 0, sizeof mss
);
719 if (vma
->vm_file
&& shmem_mapping(vma
->vm_file
->f_mapping
)) {
720 mss
.check_shmem_swap
= true;
721 smaps_walk
.pte_hole
= smaps_pte_hole
;
725 /* mmap_sem is held in m_start */
726 walk_page_vma(vma
, &smaps_walk
);
728 show_map_vma(m
, vma
, is_pid
);
734 "Shared_Clean: %8lu kB\n"
735 "Shared_Dirty: %8lu kB\n"
736 "Private_Clean: %8lu kB\n"
737 "Private_Dirty: %8lu kB\n"
738 "Referenced: %8lu kB\n"
739 "Anonymous: %8lu kB\n"
740 "AnonHugePages: %8lu kB\n"
741 "Shared_Hugetlb: %8lu kB\n"
742 "Private_Hugetlb: %7lu kB\n"
745 "KernelPageSize: %8lu kB\n"
746 "MMUPageSize: %8lu kB\n"
748 (vma
->vm_end
- vma
->vm_start
) >> 10,
750 (unsigned long)(mss
.pss
>> (10 + PSS_SHIFT
)),
751 mss
.shared_clean
>> 10,
752 mss
.shared_dirty
>> 10,
753 mss
.private_clean
>> 10,
754 mss
.private_dirty
>> 10,
755 mss
.referenced
>> 10,
757 mss
.anonymous_thp
>> 10,
758 mss
.shared_hugetlb
>> 10,
759 mss
.private_hugetlb
>> 10,
761 (unsigned long)(mss
.swap_pss
>> (10 + PSS_SHIFT
)),
762 vma_kernel_pagesize(vma
) >> 10,
763 vma_mmu_pagesize(vma
) >> 10,
764 (vma
->vm_flags
& VM_LOCKED
) ?
765 (unsigned long)(mss
.pss
>> (10 + PSS_SHIFT
)) : 0);
767 show_smap_vma_flags(m
, vma
);
772 static int show_pid_smap(struct seq_file
*m
, void *v
)
774 return show_smap(m
, v
, 1);
777 static int show_tid_smap(struct seq_file
*m
, void *v
)
779 return show_smap(m
, v
, 0);
782 static const struct seq_operations proc_pid_smaps_op
= {
786 .show
= show_pid_smap
789 static const struct seq_operations proc_tid_smaps_op
= {
793 .show
= show_tid_smap
796 static int pid_smaps_open(struct inode
*inode
, struct file
*file
)
798 return do_maps_open(inode
, file
, &proc_pid_smaps_op
);
801 static int tid_smaps_open(struct inode
*inode
, struct file
*file
)
803 return do_maps_open(inode
, file
, &proc_tid_smaps_op
);
806 const struct file_operations proc_pid_smaps_operations
= {
807 .open
= pid_smaps_open
,
810 .release
= proc_map_release
,
813 const struct file_operations proc_tid_smaps_operations
= {
814 .open
= tid_smaps_open
,
817 .release
= proc_map_release
,
820 enum clear_refs_types
{
824 CLEAR_REFS_SOFT_DIRTY
,
825 CLEAR_REFS_MM_HIWATER_RSS
,
829 struct clear_refs_private
{
830 enum clear_refs_types type
;
833 #ifdef CONFIG_MEM_SOFT_DIRTY
834 static inline void clear_soft_dirty(struct vm_area_struct
*vma
,
835 unsigned long addr
, pte_t
*pte
)
838 * The soft-dirty tracker uses #PF-s to catch writes
839 * to pages, so write-protect the pte as well. See the
840 * Documentation/vm/soft-dirty.txt for full description
841 * of how soft-dirty works.
845 if (pte_present(ptent
)) {
846 ptent
= ptep_modify_prot_start(vma
->vm_mm
, addr
, pte
);
847 ptent
= pte_wrprotect(ptent
);
848 ptent
= pte_clear_soft_dirty(ptent
);
849 ptep_modify_prot_commit(vma
->vm_mm
, addr
, pte
, ptent
);
850 } else if (is_swap_pte(ptent
)) {
851 ptent
= pte_swp_clear_soft_dirty(ptent
);
852 set_pte_at(vma
->vm_mm
, addr
, pte
, ptent
);
856 static inline void clear_soft_dirty(struct vm_area_struct
*vma
,
857 unsigned long addr
, pte_t
*pte
)
862 #if defined(CONFIG_MEM_SOFT_DIRTY) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
863 static inline void clear_soft_dirty_pmd(struct vm_area_struct
*vma
,
864 unsigned long addr
, pmd_t
*pmdp
)
866 pmd_t pmd
= pmdp_huge_get_and_clear(vma
->vm_mm
, addr
, pmdp
);
868 pmd
= pmd_wrprotect(pmd
);
869 pmd
= pmd_clear_soft_dirty(pmd
);
871 if (vma
->vm_flags
& VM_SOFTDIRTY
)
872 vma
->vm_flags
&= ~VM_SOFTDIRTY
;
874 set_pmd_at(vma
->vm_mm
, addr
, pmdp
, pmd
);
877 static inline void clear_soft_dirty_pmd(struct vm_area_struct
*vma
,
878 unsigned long addr
, pmd_t
*pmdp
)
883 static int clear_refs_pte_range(pmd_t
*pmd
, unsigned long addr
,
884 unsigned long end
, struct mm_walk
*walk
)
886 struct clear_refs_private
*cp
= walk
->private;
887 struct vm_area_struct
*vma
= walk
->vma
;
892 if (pmd_trans_huge_lock(pmd
, vma
, &ptl
) == 1) {
893 if (cp
->type
== CLEAR_REFS_SOFT_DIRTY
) {
894 clear_soft_dirty_pmd(vma
, addr
, pmd
);
898 page
= pmd_page(*pmd
);
900 /* Clear accessed and referenced bits. */
901 pmdp_test_and_clear_young(vma
, addr
, pmd
);
902 test_and_clear_page_young(page
);
903 ClearPageReferenced(page
);
909 if (pmd_trans_unstable(pmd
))
912 pte
= pte_offset_map_lock(vma
->vm_mm
, pmd
, addr
, &ptl
);
913 for (; addr
!= end
; pte
++, addr
+= PAGE_SIZE
) {
916 if (cp
->type
== CLEAR_REFS_SOFT_DIRTY
) {
917 clear_soft_dirty(vma
, addr
, pte
);
921 if (!pte_present(ptent
))
924 page
= vm_normal_page(vma
, addr
, ptent
);
928 /* Clear accessed and referenced bits. */
929 ptep_test_and_clear_young(vma
, addr
, pte
);
930 test_and_clear_page_young(page
);
931 ClearPageReferenced(page
);
933 pte_unmap_unlock(pte
- 1, ptl
);
938 static int clear_refs_test_walk(unsigned long start
, unsigned long end
,
939 struct mm_walk
*walk
)
941 struct clear_refs_private
*cp
= walk
->private;
942 struct vm_area_struct
*vma
= walk
->vma
;
944 if (vma
->vm_flags
& VM_PFNMAP
)
948 * Writing 1 to /proc/pid/clear_refs affects all pages.
949 * Writing 2 to /proc/pid/clear_refs only affects anonymous pages.
950 * Writing 3 to /proc/pid/clear_refs only affects file mapped pages.
951 * Writing 4 to /proc/pid/clear_refs affects all pages.
953 if (cp
->type
== CLEAR_REFS_ANON
&& vma
->vm_file
)
955 if (cp
->type
== CLEAR_REFS_MAPPED
&& !vma
->vm_file
)
960 static ssize_t
clear_refs_write(struct file
*file
, const char __user
*buf
,
961 size_t count
, loff_t
*ppos
)
963 struct task_struct
*task
;
964 char buffer
[PROC_NUMBUF
];
965 struct mm_struct
*mm
;
966 struct vm_area_struct
*vma
;
967 enum clear_refs_types type
;
971 memset(buffer
, 0, sizeof(buffer
));
972 if (count
> sizeof(buffer
) - 1)
973 count
= sizeof(buffer
) - 1;
974 if (copy_from_user(buffer
, buf
, count
))
976 rv
= kstrtoint(strstrip(buffer
), 10, &itype
);
979 type
= (enum clear_refs_types
)itype
;
980 if (type
< CLEAR_REFS_ALL
|| type
>= CLEAR_REFS_LAST
)
983 task
= get_proc_task(file_inode(file
));
986 mm
= get_task_mm(task
);
988 struct clear_refs_private cp
= {
991 struct mm_walk clear_refs_walk
= {
992 .pmd_entry
= clear_refs_pte_range
,
993 .test_walk
= clear_refs_test_walk
,
998 if (type
== CLEAR_REFS_MM_HIWATER_RSS
) {
1000 * Writing 5 to /proc/pid/clear_refs resets the peak
1001 * resident set size to this mm's current rss value.
1003 down_write(&mm
->mmap_sem
);
1004 reset_mm_hiwater_rss(mm
);
1005 up_write(&mm
->mmap_sem
);
1009 down_read(&mm
->mmap_sem
);
1010 if (type
== CLEAR_REFS_SOFT_DIRTY
) {
1011 for (vma
= mm
->mmap
; vma
; vma
= vma
->vm_next
) {
1012 if (!(vma
->vm_flags
& VM_SOFTDIRTY
))
1014 up_read(&mm
->mmap_sem
);
1015 down_write(&mm
->mmap_sem
);
1016 for (vma
= mm
->mmap
; vma
; vma
= vma
->vm_next
) {
1017 vma
->vm_flags
&= ~VM_SOFTDIRTY
;
1018 vma_set_page_prot(vma
);
1020 downgrade_write(&mm
->mmap_sem
);
1023 mmu_notifier_invalidate_range_start(mm
, 0, -1);
1025 walk_page_range(0, ~0UL, &clear_refs_walk
);
1026 if (type
== CLEAR_REFS_SOFT_DIRTY
)
1027 mmu_notifier_invalidate_range_end(mm
, 0, -1);
1029 up_read(&mm
->mmap_sem
);
1033 put_task_struct(task
);
1038 const struct file_operations proc_clear_refs_operations
= {
1039 .write
= clear_refs_write
,
1040 .llseek
= noop_llseek
,
1047 struct pagemapread
{
1048 int pos
, len
; /* units: PM_ENTRY_BYTES, not bytes */
1049 pagemap_entry_t
*buffer
;
1053 #define PAGEMAP_WALK_SIZE (PMD_SIZE)
1054 #define PAGEMAP_WALK_MASK (PMD_MASK)
1056 #define PM_ENTRY_BYTES sizeof(pagemap_entry_t)
1057 #define PM_PFRAME_BITS 55
1058 #define PM_PFRAME_MASK GENMASK_ULL(PM_PFRAME_BITS - 1, 0)
1059 #define PM_SOFT_DIRTY BIT_ULL(55)
1060 #define PM_MMAP_EXCLUSIVE BIT_ULL(56)
1061 #define PM_FILE BIT_ULL(61)
1062 #define PM_SWAP BIT_ULL(62)
1063 #define PM_PRESENT BIT_ULL(63)
1065 #define PM_END_OF_BUFFER 1
1067 static inline pagemap_entry_t
make_pme(u64 frame
, u64 flags
)
1069 return (pagemap_entry_t
) { .pme
= (frame
& PM_PFRAME_MASK
) | flags
};
1072 static int add_to_pagemap(unsigned long addr
, pagemap_entry_t
*pme
,
1073 struct pagemapread
*pm
)
1075 pm
->buffer
[pm
->pos
++] = *pme
;
1076 if (pm
->pos
>= pm
->len
)
1077 return PM_END_OF_BUFFER
;
1081 static int pagemap_pte_hole(unsigned long start
, unsigned long end
,
1082 struct mm_walk
*walk
)
1084 struct pagemapread
*pm
= walk
->private;
1085 unsigned long addr
= start
;
1088 while (addr
< end
) {
1089 struct vm_area_struct
*vma
= find_vma(walk
->mm
, addr
);
1090 pagemap_entry_t pme
= make_pme(0, 0);
1091 /* End of address space hole, which we mark as non-present. */
1092 unsigned long hole_end
;
1095 hole_end
= min(end
, vma
->vm_start
);
1099 for (; addr
< hole_end
; addr
+= PAGE_SIZE
) {
1100 err
= add_to_pagemap(addr
, &pme
, pm
);
1108 /* Addresses in the VMA. */
1109 if (vma
->vm_flags
& VM_SOFTDIRTY
)
1110 pme
= make_pme(0, PM_SOFT_DIRTY
);
1111 for (; addr
< min(end
, vma
->vm_end
); addr
+= PAGE_SIZE
) {
1112 err
= add_to_pagemap(addr
, &pme
, pm
);
1121 static pagemap_entry_t
pte_to_pagemap_entry(struct pagemapread
*pm
,
1122 struct vm_area_struct
*vma
, unsigned long addr
, pte_t pte
)
1124 u64 frame
= 0, flags
= 0;
1125 struct page
*page
= NULL
;
1127 if (pte_present(pte
)) {
1129 frame
= pte_pfn(pte
);
1130 flags
|= PM_PRESENT
;
1131 page
= vm_normal_page(vma
, addr
, pte
);
1132 if (pte_soft_dirty(pte
))
1133 flags
|= PM_SOFT_DIRTY
;
1134 } else if (is_swap_pte(pte
)) {
1136 if (pte_swp_soft_dirty(pte
))
1137 flags
|= PM_SOFT_DIRTY
;
1138 entry
= pte_to_swp_entry(pte
);
1139 frame
= swp_type(entry
) |
1140 (swp_offset(entry
) << MAX_SWAPFILES_SHIFT
);
1142 if (is_migration_entry(entry
))
1143 page
= migration_entry_to_page(entry
);
1146 if (page
&& !PageAnon(page
))
1148 if (page
&& page_mapcount(page
) == 1)
1149 flags
|= PM_MMAP_EXCLUSIVE
;
1150 if (vma
->vm_flags
& VM_SOFTDIRTY
)
1151 flags
|= PM_SOFT_DIRTY
;
1153 return make_pme(frame
, flags
);
1156 static int pagemap_pmd_range(pmd_t
*pmdp
, unsigned long addr
, unsigned long end
,
1157 struct mm_walk
*walk
)
1159 struct vm_area_struct
*vma
= walk
->vma
;
1160 struct pagemapread
*pm
= walk
->private;
1162 pte_t
*pte
, *orig_pte
;
1165 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
1166 if (pmd_trans_huge_lock(pmdp
, vma
, &ptl
) == 1) {
1167 u64 flags
= 0, frame
= 0;
1170 if ((vma
->vm_flags
& VM_SOFTDIRTY
) || pmd_soft_dirty(pmd
))
1171 flags
|= PM_SOFT_DIRTY
;
1174 * Currently pmd for thp is always present because thp
1175 * can not be swapped-out, migrated, or HWPOISONed
1176 * (split in such cases instead.)
1177 * This if-check is just to prepare for future implementation.
1179 if (pmd_present(pmd
)) {
1180 struct page
*page
= pmd_page(pmd
);
1182 if (page_mapcount(page
) == 1)
1183 flags
|= PM_MMAP_EXCLUSIVE
;
1185 flags
|= PM_PRESENT
;
1187 frame
= pmd_pfn(pmd
) +
1188 ((addr
& ~PMD_MASK
) >> PAGE_SHIFT
);
1191 for (; addr
!= end
; addr
+= PAGE_SIZE
) {
1192 pagemap_entry_t pme
= make_pme(frame
, flags
);
1194 err
= add_to_pagemap(addr
, &pme
, pm
);
1197 if (pm
->show_pfn
&& (flags
& PM_PRESENT
))
1204 if (pmd_trans_unstable(pmdp
))
1206 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
1209 * We can assume that @vma always points to a valid one and @end never
1210 * goes beyond vma->vm_end.
1212 orig_pte
= pte
= pte_offset_map_lock(walk
->mm
, pmdp
, addr
, &ptl
);
1213 for (; addr
< end
; pte
++, addr
+= PAGE_SIZE
) {
1214 pagemap_entry_t pme
;
1216 pme
= pte_to_pagemap_entry(pm
, vma
, addr
, *pte
);
1217 err
= add_to_pagemap(addr
, &pme
, pm
);
1221 pte_unmap_unlock(orig_pte
, ptl
);
1228 #ifdef CONFIG_HUGETLB_PAGE
1229 /* This function walks within one hugetlb entry in the single call */
1230 static int pagemap_hugetlb_range(pte_t
*ptep
, unsigned long hmask
,
1231 unsigned long addr
, unsigned long end
,
1232 struct mm_walk
*walk
)
1234 struct pagemapread
*pm
= walk
->private;
1235 struct vm_area_struct
*vma
= walk
->vma
;
1236 u64 flags
= 0, frame
= 0;
1240 if (vma
->vm_flags
& VM_SOFTDIRTY
)
1241 flags
|= PM_SOFT_DIRTY
;
1243 pte
= huge_ptep_get(ptep
);
1244 if (pte_present(pte
)) {
1245 struct page
*page
= pte_page(pte
);
1247 if (!PageAnon(page
))
1250 if (page_mapcount(page
) == 1)
1251 flags
|= PM_MMAP_EXCLUSIVE
;
1253 flags
|= PM_PRESENT
;
1255 frame
= pte_pfn(pte
) +
1256 ((addr
& ~hmask
) >> PAGE_SHIFT
);
1259 for (; addr
!= end
; addr
+= PAGE_SIZE
) {
1260 pagemap_entry_t pme
= make_pme(frame
, flags
);
1262 err
= add_to_pagemap(addr
, &pme
, pm
);
1265 if (pm
->show_pfn
&& (flags
& PM_PRESENT
))
1273 #endif /* HUGETLB_PAGE */
1276 * /proc/pid/pagemap - an array mapping virtual pages to pfns
1278 * For each page in the address space, this file contains one 64-bit entry
1279 * consisting of the following:
1281 * Bits 0-54 page frame number (PFN) if present
1282 * Bits 0-4 swap type if swapped
1283 * Bits 5-54 swap offset if swapped
1284 * Bit 55 pte is soft-dirty (see Documentation/vm/soft-dirty.txt)
1285 * Bit 56 page exclusively mapped
1287 * Bit 61 page is file-page or shared-anon
1288 * Bit 62 page swapped
1289 * Bit 63 page present
1291 * If the page is not present but in swap, then the PFN contains an
1292 * encoding of the swap file number and the page's offset into the
1293 * swap. Unmapped pages return a null PFN. This allows determining
1294 * precisely which pages are mapped (or in swap) and comparing mapped
1295 * pages between processes.
1297 * Efficient users of this interface will use /proc/pid/maps to
1298 * determine which areas of memory are actually mapped and llseek to
1299 * skip over unmapped regions.
1301 static ssize_t
pagemap_read(struct file
*file
, char __user
*buf
,
1302 size_t count
, loff_t
*ppos
)
1304 struct mm_struct
*mm
= file
->private_data
;
1305 struct pagemapread pm
;
1306 struct mm_walk pagemap_walk
= {};
1308 unsigned long svpfn
;
1309 unsigned long start_vaddr
;
1310 unsigned long end_vaddr
;
1311 int ret
= 0, copied
= 0;
1313 if (!mm
|| !atomic_inc_not_zero(&mm
->mm_users
))
1317 /* file position must be aligned */
1318 if ((*ppos
% PM_ENTRY_BYTES
) || (count
% PM_ENTRY_BYTES
))
1325 /* do not disclose physical addresses: attack vector */
1326 pm
.show_pfn
= file_ns_capable(file
, &init_user_ns
, CAP_SYS_ADMIN
);
1328 pm
.len
= (PAGEMAP_WALK_SIZE
>> PAGE_SHIFT
);
1329 pm
.buffer
= kmalloc(pm
.len
* PM_ENTRY_BYTES
, GFP_TEMPORARY
);
1334 pagemap_walk
.pmd_entry
= pagemap_pmd_range
;
1335 pagemap_walk
.pte_hole
= pagemap_pte_hole
;
1336 #ifdef CONFIG_HUGETLB_PAGE
1337 pagemap_walk
.hugetlb_entry
= pagemap_hugetlb_range
;
1339 pagemap_walk
.mm
= mm
;
1340 pagemap_walk
.private = &pm
;
1343 svpfn
= src
/ PM_ENTRY_BYTES
;
1344 start_vaddr
= svpfn
<< PAGE_SHIFT
;
1345 end_vaddr
= mm
->task_size
;
1347 /* watch out for wraparound */
1348 if (svpfn
> mm
->task_size
>> PAGE_SHIFT
)
1349 start_vaddr
= end_vaddr
;
1352 * The odds are that this will stop walking way
1353 * before end_vaddr, because the length of the
1354 * user buffer is tracked in "pm", and the walk
1355 * will stop when we hit the end of the buffer.
1358 while (count
&& (start_vaddr
< end_vaddr
)) {
1363 end
= (start_vaddr
+ PAGEMAP_WALK_SIZE
) & PAGEMAP_WALK_MASK
;
1365 if (end
< start_vaddr
|| end
> end_vaddr
)
1367 down_read(&mm
->mmap_sem
);
1368 ret
= walk_page_range(start_vaddr
, end
, &pagemap_walk
);
1369 up_read(&mm
->mmap_sem
);
1372 len
= min(count
, PM_ENTRY_BYTES
* pm
.pos
);
1373 if (copy_to_user(buf
, pm
.buffer
, len
)) {
1382 if (!ret
|| ret
== PM_END_OF_BUFFER
)
1393 static int pagemap_open(struct inode
*inode
, struct file
*file
)
1395 struct mm_struct
*mm
;
1397 mm
= proc_mem_open(inode
, PTRACE_MODE_READ
);
1400 file
->private_data
= mm
;
1404 static int pagemap_release(struct inode
*inode
, struct file
*file
)
1406 struct mm_struct
*mm
= file
->private_data
;
1413 const struct file_operations proc_pagemap_operations
= {
1414 .llseek
= mem_lseek
, /* borrow this */
1415 .read
= pagemap_read
,
1416 .open
= pagemap_open
,
1417 .release
= pagemap_release
,
1419 #endif /* CONFIG_PROC_PAGE_MONITOR */
1424 unsigned long pages
;
1426 unsigned long active
;
1427 unsigned long writeback
;
1428 unsigned long mapcount_max
;
1429 unsigned long dirty
;
1430 unsigned long swapcache
;
1431 unsigned long node
[MAX_NUMNODES
];
1434 struct numa_maps_private
{
1435 struct proc_maps_private proc_maps
;
1436 struct numa_maps md
;
1439 static void gather_stats(struct page
*page
, struct numa_maps
*md
, int pte_dirty
,
1440 unsigned long nr_pages
)
1442 int count
= page_mapcount(page
);
1444 md
->pages
+= nr_pages
;
1445 if (pte_dirty
|| PageDirty(page
))
1446 md
->dirty
+= nr_pages
;
1448 if (PageSwapCache(page
))
1449 md
->swapcache
+= nr_pages
;
1451 if (PageActive(page
) || PageUnevictable(page
))
1452 md
->active
+= nr_pages
;
1454 if (PageWriteback(page
))
1455 md
->writeback
+= nr_pages
;
1458 md
->anon
+= nr_pages
;
1460 if (count
> md
->mapcount_max
)
1461 md
->mapcount_max
= count
;
1463 md
->node
[page_to_nid(page
)] += nr_pages
;
1466 static struct page
*can_gather_numa_stats(pte_t pte
, struct vm_area_struct
*vma
,
1472 if (!pte_present(pte
))
1475 page
= vm_normal_page(vma
, addr
, pte
);
1479 if (PageReserved(page
))
1482 nid
= page_to_nid(page
);
1483 if (!node_isset(nid
, node_states
[N_MEMORY
]))
1489 static int gather_pte_stats(pmd_t
*pmd
, unsigned long addr
,
1490 unsigned long end
, struct mm_walk
*walk
)
1492 struct numa_maps
*md
= walk
->private;
1493 struct vm_area_struct
*vma
= walk
->vma
;
1498 if (pmd_trans_huge_lock(pmd
, vma
, &ptl
) == 1) {
1499 pte_t huge_pte
= *(pte_t
*)pmd
;
1502 page
= can_gather_numa_stats(huge_pte
, vma
, addr
);
1504 gather_stats(page
, md
, pte_dirty(huge_pte
),
1505 HPAGE_PMD_SIZE
/PAGE_SIZE
);
1510 if (pmd_trans_unstable(pmd
))
1512 orig_pte
= pte
= pte_offset_map_lock(walk
->mm
, pmd
, addr
, &ptl
);
1514 struct page
*page
= can_gather_numa_stats(*pte
, vma
, addr
);
1517 gather_stats(page
, md
, pte_dirty(*pte
), 1);
1519 } while (pte
++, addr
+= PAGE_SIZE
, addr
!= end
);
1520 pte_unmap_unlock(orig_pte
, ptl
);
1523 #ifdef CONFIG_HUGETLB_PAGE
1524 static int gather_hugetlb_stats(pte_t
*pte
, unsigned long hmask
,
1525 unsigned long addr
, unsigned long end
, struct mm_walk
*walk
)
1527 struct numa_maps
*md
;
1530 if (!pte_present(*pte
))
1533 page
= pte_page(*pte
);
1538 gather_stats(page
, md
, pte_dirty(*pte
), 1);
1543 static int gather_hugetlb_stats(pte_t
*pte
, unsigned long hmask
,
1544 unsigned long addr
, unsigned long end
, struct mm_walk
*walk
)
1551 * Display pages allocated per node and memory policy via /proc.
1553 static int show_numa_map(struct seq_file
*m
, void *v
, int is_pid
)
1555 struct numa_maps_private
*numa_priv
= m
->private;
1556 struct proc_maps_private
*proc_priv
= &numa_priv
->proc_maps
;
1557 struct vm_area_struct
*vma
= v
;
1558 struct numa_maps
*md
= &numa_priv
->md
;
1559 struct file
*file
= vma
->vm_file
;
1560 struct mm_struct
*mm
= vma
->vm_mm
;
1561 struct mm_walk walk
= {
1562 .hugetlb_entry
= gather_hugetlb_stats
,
1563 .pmd_entry
= gather_pte_stats
,
1567 struct mempolicy
*pol
;
1574 /* Ensure we start with an empty set of numa_maps statistics. */
1575 memset(md
, 0, sizeof(*md
));
1577 pol
= __get_vma_policy(vma
, vma
->vm_start
);
1579 mpol_to_str(buffer
, sizeof(buffer
), pol
);
1582 mpol_to_str(buffer
, sizeof(buffer
), proc_priv
->task_mempolicy
);
1585 seq_printf(m
, "%08lx %s", vma
->vm_start
, buffer
);
1588 seq_puts(m
, " file=");
1589 seq_file_path(m
, file
, "\n\t= ");
1590 } else if (vma
->vm_start
<= mm
->brk
&& vma
->vm_end
>= mm
->start_brk
) {
1591 seq_puts(m
, " heap");
1593 pid_t tid
= pid_of_stack(proc_priv
, vma
, is_pid
);
1596 * Thread stack in /proc/PID/task/TID/maps or
1597 * the main process stack.
1599 if (!is_pid
|| (vma
->vm_start
<= mm
->start_stack
&&
1600 vma
->vm_end
>= mm
->start_stack
))
1601 seq_puts(m
, " stack");
1603 seq_printf(m
, " stack:%d", tid
);
1607 if (is_vm_hugetlb_page(vma
))
1608 seq_puts(m
, " huge");
1610 /* mmap_sem is held by m_start */
1611 walk_page_vma(vma
, &walk
);
1617 seq_printf(m
, " anon=%lu", md
->anon
);
1620 seq_printf(m
, " dirty=%lu", md
->dirty
);
1622 if (md
->pages
!= md
->anon
&& md
->pages
!= md
->dirty
)
1623 seq_printf(m
, " mapped=%lu", md
->pages
);
1625 if (md
->mapcount_max
> 1)
1626 seq_printf(m
, " mapmax=%lu", md
->mapcount_max
);
1629 seq_printf(m
, " swapcache=%lu", md
->swapcache
);
1631 if (md
->active
< md
->pages
&& !is_vm_hugetlb_page(vma
))
1632 seq_printf(m
, " active=%lu", md
->active
);
1635 seq_printf(m
, " writeback=%lu", md
->writeback
);
1637 for_each_node_state(nid
, N_MEMORY
)
1639 seq_printf(m
, " N%d=%lu", nid
, md
->node
[nid
]);
1641 seq_printf(m
, " kernelpagesize_kB=%lu", vma_kernel_pagesize(vma
) >> 10);
1644 m_cache_vma(m
, vma
);
1648 static int show_pid_numa_map(struct seq_file
*m
, void *v
)
1650 return show_numa_map(m
, v
, 1);
1653 static int show_tid_numa_map(struct seq_file
*m
, void *v
)
1655 return show_numa_map(m
, v
, 0);
1658 static const struct seq_operations proc_pid_numa_maps_op
= {
1662 .show
= show_pid_numa_map
,
1665 static const struct seq_operations proc_tid_numa_maps_op
= {
1669 .show
= show_tid_numa_map
,
1672 static int numa_maps_open(struct inode
*inode
, struct file
*file
,
1673 const struct seq_operations
*ops
)
1675 return proc_maps_open(inode
, file
, ops
,
1676 sizeof(struct numa_maps_private
));
1679 static int pid_numa_maps_open(struct inode
*inode
, struct file
*file
)
1681 return numa_maps_open(inode
, file
, &proc_pid_numa_maps_op
);
1684 static int tid_numa_maps_open(struct inode
*inode
, struct file
*file
)
1686 return numa_maps_open(inode
, file
, &proc_tid_numa_maps_op
);
1689 const struct file_operations proc_pid_numa_maps_operations
= {
1690 .open
= pid_numa_maps_open
,
1692 .llseek
= seq_lseek
,
1693 .release
= proc_map_release
,
1696 const struct file_operations proc_tid_numa_maps_operations
= {
1697 .open
= tid_numa_maps_open
,
1699 .llseek
= seq_lseek
,
1700 .release
= proc_map_release
,
1702 #endif /* CONFIG_NUMA */