[root@localhost ~]#  dmesg | tail
 [<ffffffff802676e5>] do_IRQ+0xff/0x16d
 [<ffffffff80265f87>] default_idle+0x0/0x3d
 [<ffffffff80259631>] ret_from_intr+0x0/0xa
 <EOI>  [<ffffffff80265fb0>] default_idle+0x29/0x3d
 [<ffffffff80246226>] cpu_idle+0x8c/0xaf
 [<ffffffff80270ea2>] start_secondary+0x462/0x471

handlers:
[<ffffffff803d6f71>] (usb_hcd_irq+0x0/0x52)
Disabling IRQ #7