>>> 'print/a db_active+0x2000000'
print/a db_active+0x2000000
-0x7c858478
db> 
>>> 'set $maxoff=-1'
set $maxoff=-1
db> 
>>> 'print/a db_active+0x2000000'
print/a db_active+0x2000000
xhci_devclass+0x1a4a620
db> 
>>> 'set $maxoff=0x100000'
set $maxoff=0x100000
db> 
>>> 'print/a db_active+0x2000000'
print/a db_active+0x2000000
-0x7c858478
db> 
>>> 'x/x db_active'
x/x db_active
db_active:      1
db> 
>>> 'c'
c

CPU2 restarting CPUs: 0x000000000000003b
 restarted

>>> session script complete; waiting for POSTCONT marker...