[LU-19115] Auto-tuning conns_per_peer requires an explicitly specified NIC interface (ksocklnd_speed2cpp)

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.17.0
• Affects Version/s: Lustre 2.16.1
• Story Points: 3
• Severity: 3
• Assignee: Di Wang
• Reporter: Di Wang

Description

It looks like ksocklnd_speed2cpp will be skipped if NIC interface is not specified,  i.e. we have to specify 

options lnet networks="tcp0(eth0)" in lustre.conf to enable this conversion  

 

static int ksocklnd_ni_get_eth_intf_speed(struct lnet_ni *ni)
{
        struct net_device *dev;
        int intf_idx = -1;
        int ret = -1;
        DECLARE_CONST_IN_IFADDR(ifa);
        /* check if ni has interface assigned */
        if (!ni->ni_net_ns || !ni->ni_interface) {
                return 0;   <---- otherwise it will skip here.
        }
    ....

 

Ideally it may just do conversion in all cases, i.e. even without the NIC interface specify?