projects / mirror_ubuntu-bionic-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); | |
| ba76149f AA |
18 | |
| 19 | #define khugepaged_enabled() \ | |
| 20 | (transparent_hugepage_flags & \ | |
| 21 | ((1<<TRANSPARENT_HUGEPAGE_FLAG) | \ | |
| 22 | (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG))) | |
| 23 | #define khugepaged_always() \ | |
| 24 | (transparent_hugepage_flags & \ | |
| 25 | (1<<TRANSPARENT_HUGEPAGE_FLAG)) | |
| 26 | #define khugepaged_req_madv() \ | |
| 27 | (transparent_hugepage_flags & \ | |
| 28 | (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG)) | |
| 29 | #define khugepaged_defrag() \ | |
| 30 | (transparent_hugepage_flags & \ | |
| 31 | (1<<TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG)) | |
| 32 | ||
| 33 | static inline int khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm) | |
| 34 | { | |
| 35 | if (test_bit(MMF_VM_HUGEPAGE, &oldmm->flags)) | |
| 36 | return __khugepaged_enter(mm); | |
| 37 | return 0; | |
| 38 | } | |
| 39 | ||
| 40 | static inline void khugepaged_exit(struct mm_struct *mm) | |
| 41 | { | |
| 42 | if (test_bit(MMF_VM_HUGEPAGE, &mm->flags)) | |
| 43 | __khugepaged_exit(mm); | |
| 44 | } | |
| 45 | ||
| 6d50e60c DR |
46 | static inline int khugepaged_enter(struct vm_area_struct *vma, |
| 47 | unsigned long vm_flags) | |
| ba76149f AA |
48 | { |
| 49 | if (!test_bit(MMF_VM_HUGEPAGE, &vma->vm_mm->flags)) | |
| a664b2d8 | 50 | if ((khugepaged_always() || |
| 6d50e60c | 51 | (khugepaged_req_madv() && (vm_flags & VM_HUGEPAGE))) && |
| 18600332 MH |
52 | !(vm_flags & VM_NOHUGEPAGE) && |
| 53 | !test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags)) | |
| ba76149f AA |
54 | if (__khugepaged_enter(vma->vm_mm)) |
| 55 | return -ENOMEM; | |
| 56 | return 0; | |
| 57 | } | |
| 58 | #else /* CONFIG_TRANSPARENT_HUGEPAGE */ | |
| 59 | static inline int khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm) | |
| 60 | { | |
| 61 | return 0; | |
| 62 | } | |
| 63 | static inline void khugepaged_exit(struct mm_struct *mm) | |
| 64 | { | |
| 65 | } | |
| 6d50e60c DR |
66 | static inline int khugepaged_enter(struct vm_area_struct *vma, |
| 67 | unsigned long vm_flags) | |
| ba76149f AA |
68 | { |
| 69 | return 0; | |
| 70 | } | |
| 6d50e60c DR |
71 | static inline int khugepaged_enter_vma_merge(struct vm_area_struct *vma, |
| 72 | unsigned long vm_flags) | |
| ba76149f AA |
73 | { |
| 74 | return 0; | |
| 75 | } | |
| 76 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ | |
| 77 | ||
| 78 | #endif /* _LINUX_KHUGEPAGED_H */ |