RDS kernel values

How did these values become standard and can these help with errors being seen?

Kernel values:

/proc/sys/net/rds/ib

active_bonding 1

disable_unmap_fmr_cpu_assignment  0

max_recv_allocation
65899256

max_send_wr   256

trigger_active_bonding 1

active_bonding_failback_ms
10000

flow_control     0

max_recv_wr   
1024    

max_unsignaled_wr
16       

/proc/sys/net/rds

8 max_unacked_packets

1 ping_enable           

60 reconnect_max_retries 

1000 0 reconnect_retry_ms      

0 shutdown_trace_start_time

16777216max_unacked_bytes

21 pf_rds             

1000
reconnect_max_delay_ms 

1 reconnect_min_delay_ms

0 shutdown_trace_end_time

276 sol_rds

Errors:

[191785.213990] RDS/IB: recv completion <::ffff:192.168.10.1,::ffff:192.168.10.5,0> had status 4 vendor_err 0x52, disconnecting and reconnecting