(gdb) x/i vm_page_remove_xbusy+0x244
   0xcbea1c <vm_page_object_remove+388>:	bl      0x8ef9bc <panic+8>
(gdb) x/i vm_page_assert_pga_writeable+0x964
   0xcc868c <vm_page_free_prep+220>:	bl      0xcbe8a0 <vm_page_object_remove+8>
(gdb) x/i vm_page_free+0x58
   0xcbda24 <vm_page_free_toq+48>:	bl      0xcc85b8 <vm_page_free_prep+8>
(gdb) x/i sysctl_handle_uma_zone_cur+0x26f8
   0xc99218 <pcpu_page_free+140>:	bl      0xcbd9d4 <vm_page_free+8>
(gdb) x/i sysctl_handle_uma_zone_cur+0x3e04
   0xc9a924 <keg_free_slab+540>:	bctrl
(gdb) x/i sysctl_handle_uma_zone_cur+0x32d4
   0xc99df4 <zone_reclaim+724>:	bl      0xc9a710 <keg_free_slab+8>
(gdb) x/i uma_reclaim+0x1a0
   0xc96070 <uma_reclaim+416>:	bl      0xc99b28 <zone_reclaim+8>
(gdb) x/i uma_reclaim_worker+0xbc
   0xc9677c <uma_reclaim_worker+188>:	bl      0xc95ed8 <uma_reclaim+8>
(gdb) x/i fork_exit+0xc4
   0x8968e0 <fork_exit+196>:	bctrl
(gdb) x/i fork_trampoline+0x18
   0xd403a8 <fork_trampoline+24>:	bl      0x896824 <fork_exit+8>