15.10. Preventing kernel drivers from loading for kdump

Procedure

1. Display the list of modules that are loaded to the currently running kernel. Select the kernel module that you intend to block from loading:

   $ lsmod
   
   Module                  Size  Used by
   fuse                  126976  3
   xt_CHECKSUM            16384  1
   ipt_MASQUERADE         16384  1
   uinput                 20480  1
   xt_conntrack           16384  1

2. Update the KDUMP_COMMANDLINE_APPEND= variable in the /etc/sysconfig/kdump file. For example:

   KDUMP_COMMANDLINE_APPEND="rd.driver.blacklist=hv_vmbus,hv_storvsc,hv_utils,hv_netvsc,hid-hyperv"

   Also, consider the following example by using the modprobe.blacklist=<modules> configuration option:

   KDUMP_COMMANDLINE_APPEND="modprobe.blacklist=emcp modprobe.blacklist=bnx2fc modprobe.blacklist=libfcoe modprobe.blacklist=fcoe"

3. Restart the kdump service:

   # systemctl restart kdump

   See the dracut.cmdline man page on your system for more information.