I tried this modification and it works as well.
 
[root@compute3 /]# /dpdk/app/dpdk-dumpcap -i 0000:18:00.0
File: /tmp/dpdk-dumpcap_0_0000:18:00.0_20240321043451.pcapng
Capturing on '0000:18:00.0'
Packets captured: 499 ^C
Packets received/dropped on interface '0000:18:00.0': 499/0 (100.0)
 
diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index c61c52b2966b..86ccbdd78292 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -4293,6 +4293,9 @@ ixgbe_dev_link_update_share(struct rte_eth_dev *dev,
int wait = 1;
u32 esdp_reg;
+ if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+ return -1;
+
memset(&link, 0, sizeof(link));
link.link_status = RTE_ETH_LINK_DOWN;
link.link_speed = RTE_ETH_SPEED_NUM_NONE;
 

junwang01@cestc.cn
 
From: Stephen Hemminger
Date: 2024-03-21 01:33
To: dev
CC: junwang01; Stephen Hemminger
Subject: [PATCH] net/ixgbe: do not update link status in secondary process
The code to update link status is not safe in secondary process.
If called from secondary it will crash, example from dumpcap:
ixgbe_dev_link_update_share()
ixgbe_dev_link_update()
rte_eth_link_get()
 
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Reported-by: Jun Wang <junwang01@cestc.cn>
---
Simpler version of earlier patch, and add explanation.
 
drivers/net/ixgbe/ixgbe_ethdev.c | 3 +++
1 file changed, 3 insertions(+)
 
diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index c61c52b2966b..86ccbdd78292 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -4293,6 +4293,9 @@ ixgbe_dev_link_update_share(struct rte_eth_dev *dev,
int wait = 1;
u32 esdp_reg;
+ if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+ return -1;
+
memset(&link, 0, sizeof(link));
link.link_status = RTE_ETH_LINK_DOWN;
link.link_speed = RTE_ETH_SPEED_NUM_NONE;
--
2.43.0