netdev - [PATCH net 1/2] net: restore call to netdev_queue_numa_node

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Message-Id: <6b4ac678c349a70658e4b6d4f2cde481f473b0f9.1543496364.git.sd@queasysnail.net>
Date:   Thu, 29 Nov 2018 14:14:48 +0100
From:   Sabrina Dubroca <sd@...asysnail.net>
To:     netdev@...r.kernel.org
Cc:     Sabrina Dubroca <sd@...asysnail.net>,
        Amritha Nambiar <amritha.nambiar@...el.com>,
        Alexander Duyck <alexander.h.duyck@...el.com>
Subject: [PATCH net 1/2] net: restore call to netdev_queue_numa_node_write when resetting XPS

Before commit 80d19669ecd3 ("net: Refactor XPS for CPUs and Rx queues"),
netif_reset_xps_queues() did netdev_queue_numa_node_write() for all the
queues being reset. Now, this is only done when the "active" variable in
clean_xps_maps() is false, ie when on all the CPUs, there's no active
XPS mapping left.

Fixes: 80d19669ecd3 ("net: Refactor XPS for CPUs and Rx queues")
Signed-off-by: Sabrina Dubroca <sd@...asysnail.net>
---
 net/core/dev.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index ddc551f24ba2..32a63f4c3a92 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2187,17 +2187,19 @@ static void clean_xps_maps(struct net_device *dev, const unsigned long *mask,
 		active |= remove_xps_queue_cpu(dev, dev_maps, j, offset,
 					       count);
 	if (!active) {
-		if (is_rxqs_map) {
+		if (is_rxqs_map)
 			RCU_INIT_POINTER(dev->xps_rxqs_map, NULL);
-		} else {
+		else
 			RCU_INIT_POINTER(dev->xps_cpus_map, NULL);
+		kfree_rcu(dev_maps, rcu);
+	}
 
-			for (i = offset + (count - 1); count--; i--)
-				netdev_queue_numa_node_write(
-					netdev_get_tx_queue(dev, i),
-							NUMA_NO_NODE);
+	if (!is_rxqs_map) {
+		for (i = offset + (count - 1); count--; i--) {
+			netdev_queue_numa_node_write(
+				netdev_get_tx_queue(dev, i),
+				NUMA_NO_NODE);
 		}
-		kfree_rcu(dev_maps, rcu);
 	}
 }
 
-- 
2.19.2