Nvidia ConnectX-4 Lx User Manual page 26

• If your kernel version does not match with any of the offered pre-built RPMs, you can add
your kernel version by using the "mlnx_add_kernel_support.sh" script located inside the
MLNX_OFED package.

On Redhat and SLES distributions with errata kernel installed there is no need to use
the mlnx_add_kernel_support.sh script. The regular installation can be performed
and weak-updates mechanism will create symbolic links to the MLNX_OFED kernel
modules.

If you regenerate kernel modules for a custom kernel (using
), the packages installation will not involve automatic regeneration of the
support
initramfs. In some cases, such as a system with a root filesystem mounted over a
ConnectX card, not regenerating the initramfs may even cause the system to fail to
reboot.
In such cases, the installer will recommend running the following command to update
the initramfs:
dracut -f
On some OSs,
safely ignore.
libkmod: kmod_module_new_from_path: kmod_module 'mdev' already exists
with different path
The "mlnx_add_kernel_support.sh" script can be executed directly from the mlnxofedinstall
script. For further information, please see '--add-kernel-support' option below.

On Ubuntu and Debian distributions drivers installation use Dynamic Kernel Module
Support (DKMS) framework. Thus, the drivers' compilation will take place on the host
during MLNX_OFED installation.
Therefore, using "mlnx_add_kernel_support.sh" is irrelevant on Ubuntu and Debian
distributions.
Example: The following command will create a MLNX_OFED_LINUX ISO image for RedHat 7.3
under the /tmp directory.
# ./MLNX_OFED_LINUX-x.x-x-rhel7.3-x86_64/mlnx_add_kernel_support.sh -m /tmp/MLNX_OFED_LINUX-x.x-x-rhel7.3-
x86_64/ --make-tgz
Note: This program will create MLNX_OFED_LINUX TGZ
All Mellanox, OEM, OFED, or Distribution IB packages will be removed.
Do you want to continue?[y/N]:y
See log file /tmp/mlnx_ofed_iso.21642.log
Building OFED RPMs. Please wait...
Removing OFED RPMs...
Created /tmp/MLNX_OFED_LINUX-x.x-x-rhel7.3-x86_64-ext.tgz
• The script adds the following lines to /etc/security/limits.conf for the userspace components
such as MPI:
• * soft memlock unlimited
• * hard memlock unlimited
might result in the following error message which can be
dracut -f
for rhel7.3 under /tmp directory.
--add-kernel-
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