diff options
Diffstat (limited to 'mm/khugepaged.c')
| -rw-r--r-- | mm/khugepaged.c | 25 |
1 files changed, 9 insertions, 16 deletions
diff --git a/mm/khugepaged.c b/mm/khugepaged.c index b43b294ca5f8..9ef626e2c750 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -437,8 +437,8 @@ static inline int khugepaged_test_exit(struct mm_struct *mm) return atomic_read(&mm->mm_users) == 0; } -static bool hugepage_vma_check(struct vm_area_struct *vma, - unsigned long vm_flags) +bool hugepage_vma_check(struct vm_area_struct *vma, + unsigned long vm_flags) { if (!transhuge_vma_enabled(vma, vm_flags)) return false; @@ -508,20 +508,13 @@ void __khugepaged_enter(struct mm_struct *mm) void khugepaged_enter_vma_merge(struct vm_area_struct *vma, unsigned long vm_flags) { - unsigned long hstart, hend; - - /* - * khugepaged only supports read-only files for non-shmem files. - * khugepaged does not yet work on special mappings. And - * file-private shmem THP is not supported. - */ - if (!hugepage_vma_check(vma, vm_flags)) - return; - - hstart = (vma->vm_start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK; - hend = vma->vm_end & HPAGE_PMD_MASK; - if (hstart < hend) - khugepaged_enter(vma, vm_flags); + if (!test_bit(MMF_VM_HUGEPAGE, &vma->vm_mm->flags) && + khugepaged_enabled() && + (((vma->vm_start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK) < + (vma->vm_end & HPAGE_PMD_MASK))) { + if (hugepage_vma_check(vma, vm_flags)) + __khugepaged_enter(vma->vm_mm); + } } void __khugepaged_exit(struct mm_struct *mm) |