rem: thread_set_priority(tid, THREAD_MIN_RT_PRIORITY);
add: thread_set_priority(tid, B_FIRST_REAL_TIME_PRIORITY);
context: int vm_daemon_init(){	thread_id tid;	trimming_cycle = false;	// calculate the free memory low and high water at which point we enter/leave trimming phase	free_memory_low_water = vm_page_num_pages() / 8;	free_memory_high_water = vm_page_num_pages() / 4;	// create a kernel thread to select pages for pageout	tid = thread_create_kernel_thread("page daemon", &page_daemon, NULL);	thread_set_priority(tid, THREAD_MIN_RT_PRIORITY);	thread_resume_thread(tid);	return 0;}