![Kirill A. Shutemov](/assets/img/avatar_default.png)
khugepaged implementation grew to the point when it deserve separate file in source. Let's move it to mm/khugepaged.c. Link: http://lkml.kernel.org/r/1466021202-61880-32-git-send-email-kirill.shutemov@linux.intel.com Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
76 lines
2.1 KiB
C
76 lines
2.1 KiB
C
#ifndef _LINUX_KHUGEPAGED_H
|
|
#define _LINUX_KHUGEPAGED_H
|
|
|
|
#include <linux/sched.h> /* MMF_VM_HUGEPAGE */
|
|
|
|
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
|
extern struct attribute_group khugepaged_attr_group;
|
|
|
|
extern int khugepaged_init(void);
|
|
extern void khugepaged_destroy(void);
|
|
extern int start_stop_khugepaged(void);
|
|
extern int __khugepaged_enter(struct mm_struct *mm);
|
|
extern void __khugepaged_exit(struct mm_struct *mm);
|
|
extern int khugepaged_enter_vma_merge(struct vm_area_struct *vma,
|
|
unsigned long vm_flags);
|
|
|
|
#define khugepaged_enabled() \
|
|
(transparent_hugepage_flags & \
|
|
((1<<TRANSPARENT_HUGEPAGE_FLAG) | \
|
|
(1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG)))
|
|
#define khugepaged_always() \
|
|
(transparent_hugepage_flags & \
|
|
(1<<TRANSPARENT_HUGEPAGE_FLAG))
|
|
#define khugepaged_req_madv() \
|
|
(transparent_hugepage_flags & \
|
|
(1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG))
|
|
#define khugepaged_defrag() \
|
|
(transparent_hugepage_flags & \
|
|
(1<<TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG))
|
|
|
|
static inline int khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm)
|
|
{
|
|
if (test_bit(MMF_VM_HUGEPAGE, &oldmm->flags))
|
|
return __khugepaged_enter(mm);
|
|
return 0;
|
|
}
|
|
|
|
static inline void khugepaged_exit(struct mm_struct *mm)
|
|
{
|
|
if (test_bit(MMF_VM_HUGEPAGE, &mm->flags))
|
|
__khugepaged_exit(mm);
|
|
}
|
|
|
|
static inline int khugepaged_enter(struct vm_area_struct *vma,
|
|
unsigned long vm_flags)
|
|
{
|
|
if (!test_bit(MMF_VM_HUGEPAGE, &vma->vm_mm->flags))
|
|
if ((khugepaged_always() ||
|
|
(khugepaged_req_madv() && (vm_flags & VM_HUGEPAGE))) &&
|
|
!(vm_flags & VM_NOHUGEPAGE))
|
|
if (__khugepaged_enter(vma->vm_mm))
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
#else /* CONFIG_TRANSPARENT_HUGEPAGE */
|
|
static inline int khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void khugepaged_exit(struct mm_struct *mm)
|
|
{
|
|
}
|
|
static inline int khugepaged_enter(struct vm_area_struct *vma,
|
|
unsigned long vm_flags)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int khugepaged_enter_vma_merge(struct vm_area_struct *vma,
|
|
unsigned long vm_flags)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
|
|
|
|
#endif /* _LINUX_KHUGEPAGED_H */
|