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