mempolicy: rename mpol_free to mpol_put

[firefly-linux-kernel-4.4.55.git] / mm / hugetlb.c

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 51c9e2c0164068681b299b37f48840af59d5c79d..53afa8c76ada95081fe0f4b27c375fe47ba32eea 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -95,13 +95,16 @@ static struct page *dequeue_huge_page_vma(struct vm_area_struct *vma,
        int nid;
        struct page *page = NULL;
        struct mempolicy *mpol;
+       nodemask_t *nodemask;
        struct zonelist *zonelist = huge_zonelist(vma, address,
-                                       htlb_alloc_mask, &mpol);
-       struct zone **z;
-
-       for (z = zonelist->zones; *z; z++) {
-               nid = zone_to_nid(*z);
-               if (cpuset_zone_allowed_softwall(*z, htlb_alloc_mask) &&
+                                       htlb_alloc_mask, &mpol, &nodemask);
+       struct zone *zone;
+       struct zoneref *z;
+
+       for_each_zone_zonelist_nodemask(zone, z, zonelist,
+                                               MAX_NR_ZONES - 1, nodemask) {
+               nid = zone_to_nid(zone);
+               if (cpuset_zone_allowed_softwall(zone, htlb_alloc_mask) &&
                    !list_empty(&hugepage_freelists[nid])) {
                        page = list_entry(hugepage_freelists[nid].next,
                                          struct page, lru);
@@ -113,7 +116,7 @@ static struct page *dequeue_huge_page_vma(struct vm_area_struct *vma,
                        break;
                }
        }
-       mpol_free(mpol);        /* unref if mpol !NULL */
+       mpol_put(mpol); /* unref if mpol !NULL */
        return page;
 }
 
@@ -239,6 +242,11 @@ static int alloc_fresh_huge_page(void)
                hugetlb_next_nid = next_nid;
        } while (!page && hugetlb_next_nid != start_nid);
 
+       if (ret)
+               count_vm_event(HTLB_BUDDY_PGALLOC);
+       else
+               count_vm_event(HTLB_BUDDY_PGALLOC_FAIL);
+
        return ret;
 }
 
@@ -299,9 +307,11 @@ static struct page *alloc_buddy_huge_page(struct vm_area_struct *vma,
                 */
                nr_huge_pages_node[nid]++;
                surplus_huge_pages_node[nid]++;
+               __count_vm_event(HTLB_BUDDY_PGALLOC);
        } else {
                nr_huge_pages--;
                surplus_huge_pages--;
+               __count_vm_event(HTLB_BUDDY_PGALLOC_FAIL);
        }
        spin_unlock(&hugetlb_lock);
 
@@ -369,11 +379,19 @@ retry:
        resv_huge_pages += delta;
        ret = 0;
 free:
+       /* Free the needed pages to the hugetlb pool */
        list_for_each_entry_safe(page, tmp, &surplus_list, lru) {
+               if ((--needed) < 0)
+                       break;
                list_del(&page->lru);
-               if ((--needed) >= 0)
-                       enqueue_huge_page(page);
-               else {
+               enqueue_huge_page(page);
+       }
+
+       /* Free unnecessary surplus pages to the buddy allocator */
+       if (!list_empty(&surplus_list)) {
+               spin_unlock(&hugetlb_lock);
+               list_for_each_entry_safe(page, tmp, &surplus_list, lru) {
+                       list_del(&page->lru);
                        /*
                         * The page has a reference count of zero already, so
                         * call free_huge_page directly instead of using
@@ -381,10 +399,9 @@ free:
                         * unlocked which is safe because free_huge_page takes
                         * hugetlb_lock before deciding how to free the page.
                         */
-                       spin_unlock(&hugetlb_lock);
                        free_huge_page(page);
-                       spin_lock(&hugetlb_lock);
                }
+               spin_lock(&hugetlb_lock);
        }
 
        return ret;