BUG: soft lockup detected on CPU#1!

Call Trace:
 <IRQ> [<ffffffff802a0540>] softlockup_tick+0xdb/0xed
 [<ffffffff8026874e>] timer_interrupt+0x38d/0x3db
 [<ffffffff802111cd>] handle_IRQ_event+0x2d/0x60
 [<ffffffff802a087f>] __do_IRQ+0xa4/0x105
 [<ffffffff80283ffb>] _local_bh_enable+0x59/0xb3
 [<ffffffff80266f4a>] do_IRQ+0x65/0x73
 [<ffffffff80360e58>] evtchn_do_upcall+0x86/0xe0
 [<ffffffff8025cfe6>] do_hypervisor_callback+0x1e/0x2c
 <EOI> [<ffffffff802063aa>] hypercall_page+0x3aa/0x1000
 [<ffffffff802063aa>] hypercall_page+0x3aa/0x1000
 [<ffffffff80267cca>] raw_safe_halt+0x84/0xa8
 [<ffffffff80264f4d>] xen_idle+0x38/0x4a
 [<ffffffff80248cef>] cpu_idle+0x97/0xba