[dpdk-dev] [PATCH 2/2] vhost: fix IOTLB on NUMA realloc

[Maxime Coquelin]

In case of NUMA reallocation, virtqueue's iotlb list is broken,
has its head changes but first iotlb entry in the list still points
to the previous head pointer.

Also, in case of reallocation, we want the IOTLB cache mempool to be
on the new socket.

This patch perform a full re-init of the IOTLB cache when mempool
already exists, and calls the IOTLB cache init function in case
the virtqueue is being reallocated on a new socket.

Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
---
 lib/librte_vhost/iotlb.c      | 1 -
 lib/librte_vhost/vhost_user.c | 3 +++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/librte_vhost/iotlb.c b/lib/librte_vhost/iotlb.c
index 05c278040..b74cc6a78 100644
--- a/lib/librte_vhost/iotlb.c
+++ b/lib/librte_vhost/iotlb.c
@@ -309,7 +309,6 @@ vhost_user_iotlb_init(struct virtio_net *dev, int vq_index)
 		 */
 		vhost_user_iotlb_cache_remove_all(vq);
 		vhost_user_iotlb_pending_remove_all(vq);
-		return 0;
 	}
 
 #ifdef RTE_LIBRTE_VHOST_NUMA
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 9acac6125..1dfb234ca 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -314,6 +314,9 @@ numa_realloc(struct virtio_net *dev, int index)
 	dev->virtqueue[index] = vq;
 	vhost_devices[dev->vid] = dev;
 
+	if (old_vq != vq)
+		vhost_user_iotlb_init(dev, index);
+
 	return dev;
 }
 #else
-- 
2.13.6