Intel Resource Director Technology fails after upgrade to Red Hat Enterprise Linux 7.5

Issue

• Intel Resource Director Technology fails after upgrade to Red Hat Enterprise Linux 7.5

# mount -t resctrl resctrl /sys/fs/resctrl
# echo "L3:0=f;1=3ff" > /sys/fs/resctrl/schemata
-bash: echo: write error: Invalid argument

And pqos -s shows no change to cache allocation:

# pqos -s
NOTE:  Mixed use of MSR and kernel interfaces to manage
       CAT or CMT & MBM may lead to unexpected behavior.
L3CA/MBA COS definitions for Socket 0:
    L3CA COS0 => MASK 0x7ff
    L3CA COS1 => MASK 0x7ff
    L3CA COS2 => MASK 0x7ff
    L3CA COS3 => MASK 0x7ff
    L3CA COS4 => MASK 0x7ff
    L3CA COS5 => MASK 0x7ff
    L3CA COS6 => MASK 0x7ff
    L3CA COS7 => MASK 0x7ff
    L3CA COS8 => MASK 0x7ff
    L3CA COS9 => MASK 0x7ff
    L3CA COS10 => MASK 0x7ff
    L3CA COS11 => MASK 0x7ff
    L3CA COS12 => MASK 0x7ff
    L3CA COS13 => MASK 0x7ff
    L3CA COS14 => MASK 0x7ff
    L3CA COS15 => MASK 0x7ff
    MBA COS0 => 100% available
    MBA COS1 => 100% available
    MBA COS2 => 100% available
    MBA COS3 => 100% available
    MBA COS4 => 100% available
    MBA COS5 => 100% available
    MBA COS6 => 100% available
    MBA COS7 => 100% available