On 11/15/2017 07:50 PM, Gordon Messmer wrote: > On 11/15/2017 10:35 AM, Frank Thommen wrote: >> >> I tried with the files >> /etc/modprobe.d/blacklist >> /etc/modprobe.d/blacklist.conf >> and with entries >> blacklist mlx5_core >> blacklist mlx5_ib > > The "blacklist" entries prevent a module being loaded by its alias > (typically a PCI ID), but not from being loaded if something explicitly > loads it by module name. Most likely, those modules are included in > your initrd. > > I'd suggest using the entries described above, and editing grub.conf to > add arguments to the kernel command line: > rd.driver.blacklist=mlx5_core rd.driver.blacklist=mlx5_ib > ... then rebuilding your initrd using "dracut --force" Thanks for the hint. However as this should only be a temporary measure and needs to be done on ca. 100 hosts I'm not sure if we want to go through the hassles. Deploying a textfile is no problem, but creating new initrds for differing hardware.... frank