b create_slab_mgr 
r
n
p mem
fin
p $2
p *$2
q
b main
r
n
p mgr
n
n
p mgr
p *mgr
q
r
q
r
q
b 21
r
p *mgr
q
r
bt
p prev
up
p head
p head->prev
p new
p head
down
list
p next
p prev
up
p head->prev
p *head->prev
up
up
q
r
up
up
up
down
list
p i
p obj
p *obj
q
r
q
r
p area
q