Kernel Memory Requirements
	• Interrupt handlers • Must be pinned into physical memory • At locations known to hardware • Critical kernel code • Pinned, never swapped out • I/O buffers (user and kernel) • Must be pinned and in contiguous physical memory • Kernel data (e.g., PCB’s, file objects, semaphores, etc.) • Cached in physical memory • Dynamically allocated & freed not multiples of page size • Not multiples of page size; fragmentation is an issue