diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/huge_memory.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index ea0e23fd6967..e1b6f4e13b91 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -733,6 +733,16 @@ int do_huge_pmd_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma, return VM_FAULT_OOM; if (unlikely(khugepaged_enter(vma))) return VM_FAULT_OOM; + if (!(flags & FAULT_FLAG_WRITE)) { + pgtable_t pgtable; + pgtable = pte_alloc_one(mm, haddr); + if (unlikely(!pgtable)) + return VM_FAULT_OOM; + spin_lock(&mm->page_table_lock); + set_huge_zero_page(pgtable, mm, vma, haddr, pmd); + spin_unlock(&mm->page_table_lock); + return 0; + } page = alloc_hugepage_vma(transparent_hugepage_defrag(vma), vma, haddr, numa_node_id(), 0); if (unlikely(!page)) { |