mlx4_core module is not loading in Red Hat Enterprise Linux Realtime kernel.
Environment
- Red Hat Enterprise Linux Server (RHEL) 6.5
- Red Hat Enterprise MRG 2.5
- Mellanox Technologies MT27500 Family
- libmlx4-rocee-1.0.5-1.1.el6_5.x86_64
Issue
- mlx4_core driver failed to load in RHEL 6.
- Why
mlx4_core: 1' invalid for parameter hpn'message is seen indmesgfile ? - Manual loading of mlx4_core shows :
mlx4_core: `1' invalid for parameter `hpn'
FATAL: Error inserting mlx4_core (/lib/modules/3.10.0-229.rt56.162.el6rt.x86_64/kernel/drivers/net/ethernet/mellanox/mlx4/mlx4_core.ko): Invalid argument
FATAL: Error running install command for mlx4_core
Resolution
- A bug was reported for the issue on realtime-kernel. The Engineering Team is currently working on this matter. In the meantime, follow the workaround.
Workaround :
- Open the file
/etc/modprobe.d/libmlx4.confand comment out the below line :
options mlx4_core hpn=1
- After modification the file will be :
# cat etc/modprobe.d/libmlx4.conf
install mlx4_core /sbin/modprobe --ignore-install mlx4_core && (if [ -f /usr/libexec/setup-mlx4.sh -a -f /etc/rdma/mlx4.conf ]; then /usr/libexec/setup-mlx4.sh < /etc/rdma/mlx4.conf; fi; /sbin/modprobe mlx4_en; /sbin/modprobe mlx4_ib)
- Now restart the system.
Diagnostic Steps
- The network interface does not detected or not seen in
ip acommand :
# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
- The network interface driver(
mlx4_en) is not loaded :
# lsmod | grep mlx4_en
<no_output>
- Manual loading of the driver(
mlx4_en) shows error :
# modprobe mlx4_en
FATAL: Error inserting mlx4_en (lib/modules/3.10.0-229.rt56.162.el6rt.x86_64/kernel/drivers/net/ethernet/mellanox/mlx4/mlx4_en.ko): Unknown symbol in module, or unknown parameter (see dmesg)
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