net/mlx5: fix minimum number of Multi-Packet RQ buffers

[dpdk.git] / drivers / net / mlx5 / mlx5_rxq.c

diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
index 97b3e8e..8b4c1b1 100644 (file)
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -1234,6 +1234,13 @@ mlx5_mprq_alloc_mp(struct rte_eth_dev *dev)
         */
        desc *= 4;
        obj_num = desc + MLX5_MPRQ_MP_CACHE_SZ * priv->rxqs_n;
+       /*
+        * rte_mempool_create_empty() has sanity check to refuse large cache
+        * size compared to the number of elements.
+        * CACHE_FLUSHTHRESH_MULTIPLIER is defined in a C file, so using a
+        * constant number 2 instead.
+        */
+       obj_num = RTE_MAX(obj_num, MLX5_MPRQ_MP_CACHE_SZ * 2);
        /* Check a mempool is already allocated and if it can be resued. */
        if (mp != NULL && mp->elt_size >= obj_size && mp->size >= obj_num) {
                DRV_LOG(DEBUG, "port %u mempool %s is being reused",