X-Git-Url: https://gerrit.fd.io/r/gitweb?p=deb_dpdk.git;a=blobdiff_plain;f=lib%2Flibrte_vhost%2Fiotlb.c;h=c11ebcaacdc8a623d98935004555487978fe45c2;hp=b74cc6a78f8d340ec721cb741236dde1402d3177;hb=ca33590b6af032bff57d9cc70455660466a654b2;hpb=169a9de21e263aa6599cdc2d87a45ae158d9f509

diff --git a/lib/librte_vhost/iotlb.c b/lib/librte_vhost/iotlb.c
index b74cc6a7..c11ebcaa 100644
--- a/lib/librte_vhost/iotlb.c
+++ b/lib/librte_vhost/iotlb.c
@@ -50,6 +50,9 @@ struct vhost_iotlb_entry {
 
 #define IOTLB_CACHE_SIZE 2048
 
+static void
+vhost_user_iotlb_cache_random_evict(struct vhost_virtqueue *vq);
+
 static void
 vhost_user_iotlb_pending_remove_all(struct vhost_virtqueue *vq)
 {
@@ -95,9 +98,11 @@ vhost_user_iotlb_pending_insert(struct vhost_virtqueue *vq,
 
 	ret = rte_mempool_get(vq->iotlb_pool, (void **)&node);
 	if (ret) {
-		RTE_LOG(INFO, VHOST_CONFIG,
-				"IOTLB pool empty, clear pending misses\n");
-		vhost_user_iotlb_pending_remove_all(vq);
+		RTE_LOG(DEBUG, VHOST_CONFIG, "IOTLB pool empty, clear entries\n");
+		if (!TAILQ_EMPTY(&vq->iotlb_pending_list))
+			vhost_user_iotlb_pending_remove_all(vq);
+		else
+			vhost_user_iotlb_cache_random_evict(vq);
 		ret = rte_mempool_get(vq->iotlb_pool, (void **)&node);
 		if (ret) {
 			RTE_LOG(ERR, VHOST_CONFIG, "IOTLB pool still empty, failure\n");
@@ -115,7 +120,7 @@ vhost_user_iotlb_pending_insert(struct vhost_virtqueue *vq,
 	rte_rwlock_write_unlock(&vq->iotlb_pending_lock);
 }
 
-static void
+void
 vhost_user_iotlb_pending_remove(struct vhost_virtqueue *vq,
 				uint64_t iova, uint64_t size, uint8_t perm)
 {
@@ -186,8 +191,11 @@ vhost_user_iotlb_cache_insert(struct vhost_virtqueue *vq, uint64_t iova,
 
 	ret = rte_mempool_get(vq->iotlb_pool, (void **)&new_node);
 	if (ret) {
-		RTE_LOG(DEBUG, VHOST_CONFIG, "IOTLB pool empty, evict one entry\n");
-		vhost_user_iotlb_cache_random_evict(vq);
+		RTE_LOG(DEBUG, VHOST_CONFIG, "IOTLB pool empty, clear entries\n");
+		if (!TAILQ_EMPTY(&vq->iotlb_list))
+			vhost_user_iotlb_cache_random_evict(vq);
+		else
+			vhost_user_iotlb_pending_remove_all(vq);
 		ret = rte_mempool_get(vq->iotlb_pool, (void **)&new_node);
 		if (ret) {
 			RTE_LOG(ERR, VHOST_CONFIG, "IOTLB pool still empty, failure\n");