projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| ba76149f AA |
1 | #ifndef _LINUX_KHUGEPAGED_H |
| 2 | #define _LINUX_KHUGEPAGED_H | |
| 3 | ||
| 4 | #include <linux/sched.h> /* MMF_VM_HUGEPAGE */ | |
| 5 | ||
| 6 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE | |
| b46e756f KS |
7 | extern struct attribute_group khugepaged_attr_group; |
| 8 | ||
| 9 | extern int khugepaged_init(void); | |
| 10 | extern void khugepaged_destroy(void); | |
| 11 | extern int start_stop_khugepaged(void); | |
| ba76149f AA |
12 | extern int __khugepaged_enter(struct mm_struct *mm); |
| 13 | extern void __khugepaged_exit(struct mm_struct *mm); | |
| 6d50e60c DR |
14 | extern int khugepaged_enter_vma_merge(struct vm_area_struct *vma, |
| 15 | unsigned long vm_flags); | |
| ba76149f AA |
16 | |
| 17 | #define khugepaged_enabled() \ | |
| 18 | (transparent_hugepage_flags & \ | |
| 19 | ((1<<TRANSPARENT_HUGEPAGE_FLAG) | \ | |
| 20 | (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG))) | |
| 21 | #define khugepaged_always() \ | |
| 22 | (transparent_hugepage_flags & \ | |
| 23 | (1<<TRANSPARENT_HUGEPAGE_FLAG)) | |
| 24 | #define khugepaged_req_madv() \ | |
| 25 | (transparent_hugepage_flags & \ | |
| 26 | (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG)) | |
| 27 | #define khugepaged_defrag() \ | |
| 28 | (transparent_hugepage_flags & \ | |
| 29 | (1<<TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG)) | |
| 30 | ||
| 31 | static inline int khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm) | |
| 32 | { | |
| 33 | if (test_bit(MMF_VM_HUGEPAGE, &oldmm->flags)) | |
| 34 | return __khugepaged_enter(mm); | |
| 35 | return 0; | |
| 36 | } | |
| 37 | ||
| 38 | static inline void khugepaged_exit(struct mm_struct *mm) | |
| 39 | { | |
| 40 | if (test_bit(MMF_VM_HUGEPAGE, &mm->flags)) | |
| 41 | __khugepaged_exit(mm); | |
| 42 | } | |
| 43 | ||
| 6d50e60c DR |
44 | static inline int khugepaged_enter(struct vm_area_struct *vma, |
| 45 | unsigned long vm_flags) | |
| ba76149f AA |
46 | { |
| 47 | if (!test_bit(MMF_VM_HUGEPAGE, &vma->vm_mm->flags)) | |
| a664b2d8 | 48 | if ((khugepaged_always() || |
| 6d50e60c DR |
49 | (khugepaged_req_madv() && (vm_flags & VM_HUGEPAGE))) && |
| 50 | !(vm_flags & VM_NOHUGEPAGE)) | |
| ba76149f AA |
51 | if (__khugepaged_enter(vma->vm_mm)) |
| 52 | return -ENOMEM; | |
| 53 | return 0; | |
| 54 | } | |
| 55 | #else /* CONFIG_TRANSPARENT_HUGEPAGE */ | |
| 56 | static inline int khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm) | |
| 57 | { | |
| 58 | return 0; | |
| 59 | } | |
| 60 | static inline void khugepaged_exit(struct mm_struct *mm) | |
| 61 | { | |
| 62 | } | |
| 6d50e60c DR |
63 | static inline int khugepaged_enter(struct vm_area_struct *vma, |
| 64 | unsigned long vm_flags) | |
| ba76149f AA |
65 | { |
| 66 | return 0; | |
| 67 | } | |
| 6d50e60c DR |
68 | static inline int khugepaged_enter_vma_merge(struct vm_area_struct *vma, |
| 69 | unsigned long vm_flags) | |
| ba76149f AA |
70 | { |
| 71 | return 0; | |
| 72 | } | |
| 73 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ | |
| 74 | ||
| 75 | #endif /* _LINUX_KHUGEPAGED_H */ |