From: Wei Yang <richard.weiyang@gmail.com>
To: akpm@linux-foundation.org
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Wei Yang <richard.weiyang@gmail.com>
Subject: [PATCH 1/2] mm/page_alloc.c: leverage compiler to zero out used_mask
Date: Thu, 26 Mar 2020 22:24:44 +0000 [thread overview]
Message-ID: <20200326222445.18781-1-richard.weiyang@gmail.com> (raw)
Since we always clear used_mask before getting node order, we can
leverage compiler to do this instead of at run time.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
---
mm/page_alloc.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0e823bca3f2f..2144b6ceb119 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5587,14 +5587,13 @@ static void build_zonelists(pg_data_t *pgdat)
{
static int node_order[MAX_NUMNODES];
int node, load, nr_nodes = 0;
- nodemask_t used_mask;
+ nodemask_t used_mask = {.bits = {0}};
int local_node, prev_node;
/* NUMA-aware ordering of nodes */
local_node = pgdat->node_id;
load = nr_online_nodes;
prev_node = local_node;
- nodes_clear(used_mask);
memset(node_order, 0, sizeof(node_order));
while ((node = find_next_best_node(local_node, &used_mask)) >= 0) {
--
2.23.0
next reply other threads:[~2020-03-26 22:24 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-26 22:24 Wei Yang [this message]
2020-03-26 22:24 ` [PATCH 2/2] mm/page_alloc.c: define node_order with all zero Wei Yang
2020-03-26 22:36 ` [PATCH 1/2] mm/page_alloc.c: leverage compiler to zero out used_mask Jason Gunthorpe
2020-03-27 13:27 ` Wei Yang
2020-03-27 9:32 ` David Hildenbrand
2020-03-27 13:21 ` Wei Yang
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