projects / mirror_ubuntu-focal-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| ba76149f AA |
2 | #ifndef _LINUX_KHUGEPAGED_H |
| 3 | #define _LINUX_KHUGEPAGED_H | |
| 4 | ||
| f7ccbae4 IM |
5 | #include <linux/sched/coredump.h> /* MMF_VM_HUGEPAGE */ |
| 6 | ||
| ba76149f AA |
7 | |
| 8 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE | |
| b46e756f KS |
9 | extern struct attribute_group khugepaged_attr_group; |
| 10 | ||
| 11 | extern int khugepaged_init(void); | |
| 12 | extern void khugepaged_destroy(void); | |
| 13 | extern int start_stop_khugepaged(void); | |
| ba76149f AA |
14 | extern int __khugepaged_enter(struct mm_struct *mm); |
| 15 | extern void __khugepaged_exit(struct mm_struct *mm); | |
| 6d50e60c DR |
16 | extern int khugepaged_enter_vma_merge(struct vm_area_struct *vma, |
| 17 | unsigned long vm_flags); | |
| e2c01fd0 | 18 | extern void khugepaged_min_free_kbytes_update(void); |
| 27e1f827 SL |
19 | #ifdef CONFIG_SHMEM |
| 20 | extern void collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr); | |
| 21 | #else | |
| 22 | static inline void collapse_pte_mapped_thp(struct mm_struct *mm, | |
| 23 | unsigned long addr) | |
| 24 | { | |
| 25 | } | |
| 26 | #endif | |
| ba76149f AA |
27 | |
| 28 | #define khugepaged_enabled() \ | |
| 29 | (transparent_hugepage_flags & \ | |
| 30 | ((1<<TRANSPARENT_HUGEPAGE_FLAG) | \ | |
| 31 | (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG))) | |
| 32 | #define khugepaged_always() \ | |
| 33 | (transparent_hugepage_flags & \ | |
| 34 | (1<<TRANSPARENT_HUGEPAGE_FLAG)) | |
| 35 | #define khugepaged_req_madv() \ | |
| 36 | (transparent_hugepage_flags & \ | |
| 37 | (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG)) | |
| 38 | #define khugepaged_defrag() \ | |
| 39 | (transparent_hugepage_flags & \ | |
| 40 | (1<<TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG)) | |
| 41 | ||
| 42 | static inline int khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm) | |
| 43 | { | |
| 44 | if (test_bit(MMF_VM_HUGEPAGE, &oldmm->flags)) | |
| 45 | return __khugepaged_enter(mm); | |
| 46 | return 0; | |
| 47 | } | |
| 48 | ||
| 49 | static inline void khugepaged_exit(struct mm_struct *mm) | |
| 50 | { | |
| 51 | if (test_bit(MMF_VM_HUGEPAGE, &mm->flags)) | |
| 52 | __khugepaged_exit(mm); | |
| 53 | } | |
| 54 | ||
| 6d50e60c DR |
55 | static inline int khugepaged_enter(struct vm_area_struct *vma, |
| 56 | unsigned long vm_flags) | |
| ba76149f AA |
57 | { |
| 58 | if (!test_bit(MMF_VM_HUGEPAGE, &vma->vm_mm->flags)) | |
| a664b2d8 | 59 | if ((khugepaged_always() || |
| 6d50e60c | 60 | (khugepaged_req_madv() && (vm_flags & VM_HUGEPAGE))) && |
| 18600332 MH |
61 | !(vm_flags & VM_NOHUGEPAGE) && |
| 62 | !test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags)) | |
| ba76149f AA |
63 | if (__khugepaged_enter(vma->vm_mm)) |
| 64 | return -ENOMEM; | |
| 65 | return 0; | |
| 66 | } | |
| 67 | #else /* CONFIG_TRANSPARENT_HUGEPAGE */ | |
| 68 | static inline int khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm) | |
| 69 | { | |
| 70 | return 0; | |
| 71 | } | |
| 72 | static inline void khugepaged_exit(struct mm_struct *mm) | |
| 73 | { | |
| 74 | } | |
| 6d50e60c DR |
75 | static inline int khugepaged_enter(struct vm_area_struct *vma, |
| 76 | unsigned long vm_flags) | |
| ba76149f AA |
77 | { |
| 78 | return 0; | |
| 79 | } | |
| 6d50e60c DR |
80 | static inline int khugepaged_enter_vma_merge(struct vm_area_struct *vma, |
| 81 | unsigned long vm_flags) | |
| ba76149f AA |
82 | { |
| 83 | return 0; | |
| 84 | } | |
| 27e1f827 SL |
85 | static inline void collapse_pte_mapped_thp(struct mm_struct *mm, |
| 86 | unsigned long addr) | |
| 87 | { | |
| 88 | } | |
| e2c01fd0 VB |
89 | |
| 90 | static inline void khugepaged_min_free_kbytes_update(void) | |
| 91 | { | |
| 92 | } | |
| ba76149f AA |
93 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
| 94 | ||
| 95 | #endif /* _LINUX_KHUGEPAGED_H */ |