[dpdk-users] Unregistered mempool in secondary

Shahaf Shuler shahafs at mellanox.com
Thu Dec 6 08:18:53 CET 2018

Hi Tom,

There is a complete isolation between the resources of each port.
Meaning, mempool cannot be registered on one port and be used on the other (w/o explicit registration).

In order your solution to work, the primary process needs to probe both ports, so that the mempool_walk will happen on both and the pool will be registered to both.

From: Tom Barbette <barbette at kth.se>
Sent: Thursday, December 6, 2018 1:41 AM
To: Shahaf Shuler <shahafs at mellanox.com>; Yongseok Koh <yskoh at mellanox.com>
Cc: users at dpdk.org
Subject: Unregistered mempool in secondary

Hi mlx5 maintainers,

Since we're using a second ConnectX 5 NIC plugged to our second CPU socket, we see the following message when flowing packets through that port :

net_mlx5: port 1 using address (0x6000712742c0) of unregistered mempool in secondary process, please create mempool before rte_eth_dev_start()

The secondary process has all of the primary process pools registered via rte_mempool_walk (2 as we have 2 numa nodes). But that address in the error message is actually not between any of the pool->mz->addr_64  + pool->mz->size range. So maybe this comes from an automatically created pool of the primary ? If so, how can we force it to be created before we call eth_dev_start?

We think the only change is that the second port is now a dedicated NIC on the second socket, instead of the second port of the same NIC on the first socket. But we are not 100% sure this is the triggering event. The same test worked before, still with DPDK 18.08.


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