Update with PerformanceProfile (4.14) with memmap reservations, 

- The issue is that when the profile got updated the entries in /proc/cmdline got compressed as one entry.

spec:
  additionalKernelArgs:
  - memmap=0x80000000\$0x10000000
  - devmem.restricted=0
  

The error in /proc/cmdline is like this:
  memmap=0x80000000devmem.restricted=0
  
but the correct entries should be like:
  memmap=0x80000000$0x100000000 devmem.restricted=0

There's a bug with the way it escapes the $ character when generating the cmdline boot command.

Re-create the PerformanceProfile with the memmap and devmem values in spec part in the additionalKernelArgs, just like below.

spec: 
  additionalKernelArgs: 
  - memmap=0x80000000\$0x10000000 
  - devmem.restricted=0

1. Create the PerfomanceProfile with the additionalKernelArgs values.
2. Apply the created performanceprofile and wait for a few minutes to take effect. (Faster on worker nodes)
3. Enter the debug mode in one node and check the generated values in /proc/cmdline.

The incorrect entry usually looks like this.

memmap=0x80000000devmem.restricted=0 

but the correct one should be like this.

memmap=0x80000000$0x100000000 devmem.restricted=0