If SL6.9 is installed on a system, it is recommended that the following steps should be executed to disable Spectre Meltdown:
- If CyFlex is running, then shut it down:
- Make a copy of the GRUB menu interface configuration file before editing:
$ cd /boot/grub
$ sudo cp grub.conf grub.conf.bak
- Edit the GRUB menu configuration to add the kernel boot options:
$ cd /boot/grub/
$ sudo nano grub.conf
If more than one kernel line is in the file, locate the following line:
kernel /vmlinuz-2.6.32-754.6.3.el6.i686 ro root=…
At the end of the line showing the kernel version (above), add the following:
This is a long line and the contents of the line must be all on one line.
- Save the file.
- Reboot the system.
Spectre Meltdown is known to cause CPU slowdowns.