linux-kernel - [PATCH 07/18] mm, hugetlb: pass has_reserve to dequeue_huge_page

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Date:	Mon, 29 Jul 2013 14:31:58 +0900
From:	Joonsoo Kim <iamjoonsoo.kim@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
	Michal Hocko <mhocko@...e.cz>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Hugh Dickins <hughd@...gle.com>,
	Davidlohr Bueso <davidlohr.bueso@...com>,
	David Gibson <david@...son.dropbear.id.au>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Joonsoo Kim <js1304@...il.com>,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Hillf Danton <dhillf@...il.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [PATCH 07/18] mm, hugetlb: pass has_reserve to dequeue_huge_page_vma()

We don't have to call vma_has_reserve() each time we need information.
Passing has_reserve unburden this effort.

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

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index ff46a2c..1426c03 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -572,7 +572,8 @@ static struct page *dequeue_huge_page_node(struct hstate *h, int nid)
 
 static struct page *dequeue_huge_page_vma(struct hstate *h,
 				struct vm_area_struct *vma,
-				unsigned long address, int avoid_reserve)
+				unsigned long address,
+				int has_reserve, int avoid_reserve)
 {
 	struct page *page = NULL;
 	struct mempolicy *mpol;
@@ -587,8 +588,7 @@ static struct page *dequeue_huge_page_vma(struct hstate *h,
 	 * have no page reserves. This check ensures that reservations are
 	 * not "stolen". The child may still get SIGKILLed
 	 */
-	if (!vma_has_reserves(h, vma, address) &&
-			h->free_huge_pages - h->resv_huge_pages == 0)
+	if (!has_reserve && h->free_huge_pages - h->resv_huge_pages == 0)
 		return NULL;
 
 	/* If reserves cannot be used, ensure enough pages are in the pool */
@@ -607,7 +607,7 @@ retry_cpuset:
 			if (page) {
 				if (avoid_reserve)
 					break;
-				if (!vma_has_reserves(h, vma, address))
+				if (!has_reserve)
 					break;
 
 				h->resv_huge_pages--;
@@ -1159,7 +1159,7 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
 		return ERR_PTR(-ENOSPC);
 	}
 	spin_lock(&hugetlb_lock);
-	page = dequeue_huge_page_vma(h, vma, addr, avoid_reserve);
+	page = dequeue_huge_page_vma(h, vma, addr, has_reserve, avoid_reserve);
 	if (!page) {
 		spin_unlock(&hugetlb_lock);
 		page = alloc_buddy_huge_page(h, NUMA_NO_NODE);
-- 
1.7.9.5

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