Subject: Dear Thomas and all,
I hope you all get safely back home after DPDK summit. (When I get back Japan, it is chilling. (start of winter)) On DPDK 18.11.0, we tried to remove vhost device by using rte_eal_hotplug_remove(). However, following syslog message is printed. “EAL: Error: Invalid memory” At DPDK summit San Jose, we had chance to ask Thomas how to handle the error message, and he gave us following advice: Replace “rte_eal_hotplug_add()” to “rte_dev_probe(devargs)” and “rte_eal_hotplug_remove()” to “rte_eth_dev_close() and rte_dev_remove(rte_dev)” We tested above changes, but the result is the same (i.e., same error message is printed). The debug log message says: --- [primary] VHOST_CONFIG: vhost-user server: socket created, fd: 17 VHOST_CONFIG: bind to /tmp/sock0 EAL: Error: Invalid memory VHOST_CONFIG: vhost-user server: socket created, fd: 17 VHOST_CONFIG: bind to /tmp/sock0 [secondary] APP: devargs=eth_vhost0,iface=/tmp/sock0,queues=1 EAL: request: eal_dev_mp_request EAL: msg: eal_dev_mp_request EAL: request: bus_vdev_mp EAL: msg: bus_vdev_mp EAL: msg: bus_vdev_mp EAL: reply: eal_dev_mp_request EAL: msg: eal_dev_mp_request rte_eth_promiscuous_disable: Function not supported rte_eth_allmulticast_disable: Function not supported APP: To Server: add EAL: request: eal_dev_mp_request EAL: msg: eal_dev_mp_request EAL: reply: eal_dev_mp_request EAL: msg: eal_dev_mp_request APP: To Server: del APP: devargs=eth_vhost0,iface=/tmp/sock0,queues=1 EAL: request: eal_dev_mp_request EAL: msg: eal_dev_mp_request EAL: request: bus_vdev_mp EAL: msg: bus_vdev_mp EAL: msg: bus_vdev_mp EAL: reply: eal_dev_mp_request EAL: msg: eal_dev_mp_request rte_eth_promiscuous_disable: Function not supported rte_eth_allmulticast_disable: Function not supported APP: To Server: add --- We would like to ask: 1) Is the message “EAL: Error: Invalid memory” ignorable or not? There is no obstacle except this message to re-add the vhost device. 2) Which is the better(best?) way to add/del vhost device “rte_eal_hotplug_add/remove()” or the way Thomas suggested? Thanks in advance and have a nice day. BR, Hideyuki Yamashita NTT TechnoCross
