This saves a lot of metadata space if you're creating lots of empty devs (4k per dev). Also makes things faster since we don't have to allocate.
		
			
				
	
	
	
		
			4.4 KiB
		
	
	
	
	
	
	
	
			
		
		
	
	
			4.4 KiB
		
	
	
	
	
	
	
	
This saves a lot of metadata space if you're creating lots of empty devs (4k per dev). Also makes things faster since we don't have to allocate.