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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_KHUGEPAGED_H
3#define _LINUX_KHUGEPAGED_H
4
5#include <linux/sched/coredump.h> /* MMF_VM_HUGEPAGE */
6
7extern unsigned int khugepaged_max_ptes_none __read_mostly;
8#ifdef CONFIG_TRANSPARENT_HUGEPAGE
9extern struct attribute_group khugepaged_attr_group;
10
11extern int khugepaged_init(void);
12extern void khugepaged_destroy(void);
13extern int start_stop_khugepaged(void);
14extern void __khugepaged_enter(struct mm_struct *mm);
15extern void __khugepaged_exit(struct mm_struct *mm);
16extern void khugepaged_enter_vma(struct vm_area_struct *vma,
17 unsigned long vm_flags);
18extern void khugepaged_min_free_kbytes_update(void);
19extern bool current_is_khugepaged(void);
20#ifdef CONFIG_SHMEM
21extern int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
22 bool install_pmd);
23#else
24static inline int collapse_pte_mapped_thp(struct mm_struct *mm,
25 unsigned long addr, bool install_pmd)
26{
27 return 0;
28}
29#endif
30
31static inline void khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm)
32{
33 if (test_bit(MMF_VM_HUGEPAGE, &oldmm->flags))
34 __khugepaged_enter(mm);
35}
36
37static inline void khugepaged_exit(struct mm_struct *mm)
38{
39 if (test_bit(MMF_VM_HUGEPAGE, &mm->flags))
40 __khugepaged_exit(mm);
41}
42#else /* CONFIG_TRANSPARENT_HUGEPAGE */
43static inline void khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm)
44{
45}
46static inline void khugepaged_exit(struct mm_struct *mm)
47{
48}
49static inline void khugepaged_enter_vma(struct vm_area_struct *vma,
50 unsigned long vm_flags)
51{
52}
53static inline int collapse_pte_mapped_thp(struct mm_struct *mm,
54 unsigned long addr, bool install_pmd)
55{
56 return 0;
57}
58
59static inline void khugepaged_min_free_kbytes_update(void)
60{
61}
62
63static inline bool current_is_khugepaged(void)
64{
65 return false;
66}
67#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
68
69#endif /* _LINUX_KHUGEPAGED_H */