[PATCH 11/18] mm, hugetlb: move down outside_reserve check

[Joonsoo Kim]

Just move down outsider_reserve check.
This makes code more readable.

There is no functional change.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 5f31ca5..94173e0 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2530,20 +2530,6 @@ retry_avoidcopy:
 		return 0;
 	}
 
-	/*
-	 * If the process that created a MAP_PRIVATE mapping is about to
-	 * perform a COW due to a shared page count, attempt to satisfy
-	 * the allocation without using the existing reserves. The pagecache
-	 * page is used to determine if the reserve at this address was
-	 * consumed or not. If reserves were used, a partial faulted mapping
-	 * at the time of fork() could consume its reserves on COW instead
-	 * of the full address range.
-	 */
-	if (!(vma->vm_flags & VM_MAYSHARE) &&
-			is_vma_resv_set(vma, HPAGE_RESV_OWNER) &&
-			old_page != pagecache_page)
-		outside_reserve = 1;
-
 	page_cache_get(old_page);
 
 	/* Drop page_table_lock as buddy allocator may be called */
@@ -2557,6 +2543,20 @@ retry_avoidcopy:
 		spin_lock(&mm->page_table_lock);
 		return VM_FAULT_OOM;
 	}
+
+	/*
+	 * If the process that created a MAP_PRIVATE mapping is about to
+	 * perform a COW due to a shared page count, attempt to satisfy
+	 * the allocation without using the existing reserves. The pagecache
+	 * page is used to determine if the reserve at this address was
+	 * consumed or not. If reserves were used, a partial faulted mapping
+	 * at the time of fork() could consume its reserves on COW instead
+	 * of the full address range.
+	 */
+	if (!(vma->vm_flags & VM_MAYSHARE) &&
+			is_vma_resv_set(vma, HPAGE_RESV_OWNER) &&
+			old_page != pagecache_page)
+		outside_reserve = 1;
 	use_reserve = use_reserve && !outside_reserve;
 
 	new_page = alloc_huge_page(vma, address, use_reserve);
-- 
1.7.9.5

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