diff options
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 29a6cd2d3..0a259c2e9 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1460,7 +1460,7 @@ int move_huge_pmd(struct vm_area_struct *vma, struct vm_area_struct *new_vma, { int ret = 0; pmd_t pmd; - + bool force_flush = false; struct mm_struct *mm = vma->vm_mm; if ((old_addr & ~HPAGE_PMD_MASK) || @@ -1481,8 +1481,12 @@ int move_huge_pmd(struct vm_area_struct *vma, struct vm_area_struct *new_vma, ret = __pmd_trans_huge_lock(old_pmd, vma); if (ret == 1) { pmd = pmdp_get_and_clear(mm, old_addr, old_pmd); + if (pmd_present(pmd)) + force_flush = true; VM_BUG_ON(!pmd_none(*new_pmd)); set_pmd_at(mm, new_addr, new_pmd, pmd); + if (force_flush) + flush_tlb_range(vma, old_addr, old_addr + PMD_SIZE); spin_unlock(&mm->page_table_lock); } out: |