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Date: Mon, 21 Aug 2023 17:23:39 +0300 From: Ido Schimmel <idosch@...dia.com> To: <netdev@...r.kernel.org> CC: <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>, <edumazet@...gle.com>, <dsahern@...nel.org>, <mlxsw@...dia.com>, Ido Schimmel <idosch@...dia.com> Subject: [PATCH net-next] vrf: Remove unnecessary RCU-bh critical section dev_queue_xmit_nit() already uses rcu_read_lock() / rcu_read_unlock() and nothing suggests that softIRQs should be disabled around it. Therefore, remove the rcu_read_lock_bh() / rcu_read_unlock_bh() surrounding it. Tested using [1] with lockdep enabled. [1] #!/bin/bash ip link add name vrf1 up type vrf table 100 ip link add name veth0 type veth peer name veth1 ip link set dev veth1 master vrf1 ip link set dev veth0 up ip link set dev veth1 up ip address add 192.0.2.1/24 dev veth0 ip address add 192.0.2.2/24 dev veth1 ip rule add pref 32765 table local ip rule del pref 0 tcpdump -i vrf1 -c 20 -w /dev/null & sleep 10 ping -i 0.1 -c 10 -q 192.0.2.2 Signed-off-by: Ido Schimmel <idosch@...dia.com> --- drivers/net/vrf.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c index 6043e63b42f9..43f374444684 100644 --- a/drivers/net/vrf.c +++ b/drivers/net/vrf.c @@ -638,9 +638,7 @@ static void vrf_finish_direct(struct sk_buff *skb) eth_zero_addr(eth->h_dest); eth->h_proto = skb->protocol; - rcu_read_lock_bh(); dev_queue_xmit_nit(skb, vrf_dev); - rcu_read_unlock_bh(); skb_pull(skb, ETH_HLEN); } -- 2.40.1
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