diff options
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 88e7293b96b..4f3ea0b1e57 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1906,14 +1906,12 @@ static int __init hugetlb_init(void) default_hstate.max_huge_pages = default_hstate_max_huge_pages; hugetlb_init_hstates(); - gather_bootmem_prealloc(); - report_hugepages(); hugetlb_sysfs_init(); - hugetlb_register_all_nodes(); + hugetlb_cgroup_file_init(); return 0; } @@ -1943,13 +1941,6 @@ void __init hugetlb_add_hstate(unsigned order) h->next_nid_to_free = first_node(node_states[N_MEMORY]); snprintf(h->name, HSTATE_NAME_LEN, "hugepages-%lukB", huge_page_size(h)/1024); - /* - * Add cgroup control files only if the huge page consists - * of more than two normal pages. This is because we use - * page[2].lru.next for storing cgoup details. - */ - if (order >= HUGETLB_CGROUP_MIN_ORDER) - hugetlb_cgroup_file_init(hugetlb_max_hstate - 1); parsed_hstate = h; } @@ -3016,7 +3007,7 @@ same_page: return i ? i : -EFAULT; } -void hugetlb_change_protection(struct vm_area_struct *vma, +unsigned long hugetlb_change_protection(struct vm_area_struct *vma, unsigned long address, unsigned long end, pgprot_t newprot) { struct mm_struct *mm = vma->vm_mm; @@ -3024,6 +3015,7 @@ void hugetlb_change_protection(struct vm_area_struct *vma, pte_t *ptep; pte_t pte; struct hstate *h = hstate_vma(vma); + unsigned long pages = 0; BUG_ON(address >= end); flush_cache_range(vma, address, end); @@ -3034,12 +3026,15 @@ void hugetlb_change_protection(struct vm_area_struct *vma, ptep = huge_pte_offset(mm, address); if (!ptep) continue; - if (huge_pmd_unshare(mm, &address, ptep)) + if (huge_pmd_unshare(mm, &address, ptep)) { + pages++; continue; + } if (!huge_pte_none(huge_ptep_get(ptep))) { pte = huge_ptep_get_and_clear(mm, address, ptep); pte = pte_mkhuge(pte_modify(pte, newprot)); set_huge_pte_at(mm, address, ptep, pte); + pages++; } } spin_unlock(&mm->page_table_lock); @@ -3051,6 +3046,8 @@ void hugetlb_change_protection(struct vm_area_struct *vma, */ flush_tlb_range(vma, start, end); mutex_unlock(&vma->vm_file->f_mapping->i_mmap_mutex); + + return pages << h->order; } int hugetlb_reserve_pages(struct inode *inode, |