Re: [dpdk-dev] [PATCH] net/i40evf: fix packet loss issue for X722

-----Original Message-----
From: Xing, Beilei <redacted>
Sent: Wednesday, February 24, 2021 10:09 AM
To: Guo, Jia <redacted>
Cc: dev@dpdk.org; Xing, Beilei <redacted>; stable@dpdk.org;
Zhang, HengjianX [off-list ref]
Subject: [PATCH] net/i40evf: fix packet loss issue for X722

From: Beilei Xing <redacted>

When Tx queue number is more than Rx queue number, and RSS is enabled,
there'll be packet loss with X722.
The root cause is the lookup table is not configured correctly, since it uses
VF's queue pair number but not Rx queue number.

Fixes: 2da3ba746795 ("net/i40e: fix VF runtime queues RSS config")
Cc: stable@dpdk.org

Signed-off-by: Beilei Xing <redacted>
Signed-off-by: Hengjian Zhang <redacted>
---
 drivers/net/i40e/i40e_ethdev_vf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c

b/drivers/net/i40e/i40e_ethdev_vf.c
index 2909b4d894..0c9bd8d2c6 100644

--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c

@@ -2746,7 +2746,7 @@ i40evf_config_rss(struct i40e_vf *vf)
 		}

 		for (i = 0; i < rss_lut_size; i++)
-			lut_info[i] = i % vf->num_queue_pairs;
+			lut_info[i] = i % num;

 		ret = i40evf_set_rss_lut(&vf->vsi, lut_info,
 					 rss_lut_size);
--

2.26.2