For eth dev, dpdk XXX_rx_queue_start fuction will pre alloc mbuf for rxq, if n_mbufs < n_rxq * rxq_size, dev will start error becuse of it cannot allocate memory. When n_mbufs are not enough, the mempool is not necessary to create.
Signed-off-by: yangchang <[email protected]> --- lib/netdev-dpdk.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c index 72e7a32..bc3353e 100644 --- a/lib/netdev-dpdk.c +++ b/lib/netdev-dpdk.c @@ -757,6 +757,19 @@ dpdk_mp_create(struct netdev_dpdk *dev, int mtu) n_mbufs = dpdk_calculate_mbufs(dev, mtu); do { + /* For eth dev, dpdk XXX_rx_queue_start fuction will pre alloc mbuf + * for rxq, if n_mbufs < n_rxq * rxq_size, dev will start error + * becuse of it cannot allocate memory. + */ + if ((!per_port_mp) && (dev->type == DPDK_DEV_ETH) && + (n_mbufs < dev->requested_n_rxq * dev->requested_rxq_size)) { + VLOG_ERR("Port %s: a mempool of %u mbuffs is not enough " + "for %d Rx queues and %d queue size", + netdev_name, n_mbufs, dev->requested_n_rxq, + dev->requested_rxq_size); + break; + } + /* Full DPDK memory pool name must be unique and cannot be * longer than RTE_MEMPOOL_NAMESIZE. Note that for the shared * mempool case this can result in one device using a mempool -- 1.8.3.1 [email protected] _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
