From 918177d6fdbc6f99f797fd8e6db8cc1493e9a30f Mon Sep 17 00:00:00 2001
From: Jin Yu <jin.yu@intel.com>
Date: Wed, 10 Jun 2020 00:00:22 +0800
Subject: [PATCH] vhost: set the packed ring as default

The packed ring can supply up to 10% performance promotion.
Let's set the packed ring format as default.

Change-Id: Ie722417d20f3355769eefce4fec9831c60976e6f
Signed-off-by: Jin Yu <jin.yu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/2821
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
---
 lib/vhost/vhost_internal.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/vhost/vhost_internal.h b/lib/vhost/vhost_internal.h
index 05992657c..3aa89768a 100644
--- a/lib/vhost/vhost_internal.h
+++ b/lib/vhost/vhost_internal.h
@@ -74,7 +74,8 @@
 	(1ULL << VIRTIO_F_VERSION_1) | \
 	(1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) | \
 	(1ULL << VIRTIO_RING_F_EVENT_IDX) | \
-	(1ULL << VIRTIO_RING_F_INDIRECT_DESC))
+	(1ULL << VIRTIO_RING_F_INDIRECT_DESC) | \
+	(1ULL << VIRTIO_F_RING_PACKED))
 
 #define SPDK_VHOST_DISABLED_FEATURES ((1ULL << VIRTIO_RING_F_EVENT_IDX) | \
 	(1ULL << VIRTIO_F_NOTIFY_ON_EMPTY))