linux-kernel - [RFC v1 02/19] mm, hugetlb: use for_each_node in dequeue_huge_page

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Message-Id: <20191121151811.49742-3-fly@kernel.page>
Date:   Thu, 21 Nov 2019 23:17:54 +0800
From:   Pengfei Li <fly@...nel.page>
To:     akpm@...ux-foundation.org
Cc:     mgorman@...hsingularity.net, mhocko@...nel.org, vbabka@...e.cz,
        cl@...ux.com, iamjoonsoo.kim@....com, guro@...com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Pengfei Li <fly@...nel.page>
Subject: [RFC v1 02/19] mm, hugetlb: use for_each_node in dequeue_huge_page_nodemask()

In dequeue_huge_page_nodemask(), we want to traverse node instead of
zone, so use for_each_node instead of for_each_zone.

Signed-off-by: Pengfei Li <fly@...nel.page>
---
 mm/hugetlb.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 2e55ec5dc84d..287b90c7ab36 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -850,25 +850,18 @@ static struct page *dequeue_huge_page_nodemask(struct hstate *h, gfp_t gfp_mask,
 	unsigned int cpuset_mems_cookie;
 	struct nodelist *nodelist;
 	struct nlist_traverser t;
-	struct zone *zone;
-	int node = NUMA_NO_NODE;
+	int node;
 
 	nodelist = node_nodelist(nid, gfp_mask);
 
 retry_cpuset:
 	cpuset_mems_cookie = read_mems_allowed_begin();
-	for_each_zone_nlist_nodemask(zone, &t, nodelist, gfp_zone(gfp_mask), nmask) {
+	for_each_node_nlist_nodemask(node, &t, nodelist,
+					gfp_zone(gfp_mask), nmask) {
 		struct page *page;
 
-		if (!cpuset_zone_allowed(zone, gfp_mask))
-			continue;
-		/*
-		 * no need to ask again on the same node. Pool is node rather than
-		 * zone aware
-		 */
-		if (zone_to_nid(zone) == node)
+		if (!cpuset_node_allowed(node, gfp_mask))
 			continue;
-		node = zone_to_nid(zone);
 
 		page = dequeue_huge_page_node_exact(h, node);
 		if (page)
-- 
2.23.0