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

beilei.xing at intel.com beilei.xing at intel.com
Wed Feb 24 03:09:00 CET 2021

From: Beilei Xing <beilei.xing at intel.com>

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 at dpdk.org

Signed-off-by: Beilei Xing <beilei.xing at intel.com>
Signed-off-by: Hengjian Zhang <hengjianx.zhang at intel.com>
 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,

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