diff mbox series

[v3,2/6] vhost: skip access lock when vDPA is configured

Message ID 1593439701-136089-3-git-send-email-matan@mellanox.com (mailing list archive)
State Accepted, archived
Delegated to: Maxime Coquelin
Headers show
Series vhost: improve ready state | expand

Checks

Context Check Description
ci/Intel-compilation fail apply issues
ci/checkpatch success coding style OK

Commit Message

Matan Azrad June 29, 2020, 2:08 p.m. UTC
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 <matan@mellanox.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
---
 lib/librte_vhost/vhost_user.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
diff mbox series

Patch

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;