Paging of Kernel Memory

[Vijay Chauhan]

Hi,

i was going through the Linux Kernel Development book. It mention the following:

"Additionally, kernel memory is not pageable.Therefore, every byte of
memory you consume is one less byte of available physical memory."

What is the meaning of 'Kernel memory is not pageable'? Anyone can
give details would help me in understanding.

Thanks,
Vijay