-----Original Message-----
From: dev <redacted> On Behalf Of Matan Azrad
Sent: Thursday, June 25, 2020 9:38 PM
To: Maxime Coquelin <redacted>
Cc: dev@dpdk.org; Wang, Xiao W <redacted>
Subject: [dpdk-dev] [PATCH v2 1/5] vhost: skip access lock when vDPA is
configured

No need to take access lock in the vhost-user message handler when vDPA
driver controls all the data-path of the vhost device.

It allows the vDPA set_vring_state operation callback to configure guest
notifications.

Signed-off-by: Matan Azrad <redacted>
Reviewed-by: Maxime Coquelin <redacted>
---
 lib/librte_vhost/vhost_user.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c index

4e1af91..8d8050b 100644

--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c

@@ -2690,8 +2690,10 @@ typedef int (*vhost_message_handler_t)(struct

virtio_net **pdev,
 	case VHOST_USER_SEND_RARP:
 	case VHOST_USER_NET_SET_MTU:
 	case VHOST_USER_SET_SLAVE_REQ_FD:
-		vhost_user_lock_all_queue_pairs(dev);
-		unlock_required = 1;
+		if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
+			vhost_user_lock_all_queue_pairs(dev);
+			unlock_required = 1;
+		}
 		break;
 	default:
 		break;
--
1.8.3.1