diff options
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 7224a4f0710..db861d8b6c2 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -418,9 +418,14 @@ static struct page *alloc_huge_page_private(struct vm_area_struct *vma, if (free_huge_pages > resv_huge_pages) page = dequeue_huge_page(vma, addr); spin_unlock(&hugetlb_lock); - if (!page) + if (!page) { page = alloc_buddy_huge_page(vma, addr); - return page ? page : ERR_PTR(-VM_FAULT_OOM); + if (!page) { + hugetlb_put_quota(vma->vm_file->f_mapping, 1); + return ERR_PTR(-VM_FAULT_OOM); + } + } + return page; } static struct page *alloc_huge_page(struct vm_area_struct *vma, @@ -694,6 +699,11 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src, dst_pte = huge_pte_alloc(dst, addr); if (!dst_pte) goto nomem; + + /* If the pagetables are shared don't copy or take references */ + if (dst_pte == src_pte) + continue; + spin_lock(&dst->page_table_lock); spin_lock(&src->page_table_lock); if (!pte_none(*src_pte)) { @@ -1206,8 +1216,10 @@ int hugetlb_reserve_pages(struct inode *inode, long from, long to) if (hugetlb_get_quota(inode->i_mapping, chg)) return -ENOSPC; ret = hugetlb_acct_memory(chg); - if (ret < 0) + if (ret < 0) { + hugetlb_put_quota(inode->i_mapping, chg); return ret; + } region_add(&inode->i_mapping->private_list, from, to); return 0; } |