root@xenturio1:~# /usr/lib/xen/bin/xenctx -s /boot/System.map-3.1.0-rc2-xenU+ 7 0
rip: ffffffff810013aa hypercall_page+0x3aa
flags: 00001246 i z p
rsp: ffffffff81801f40
rax: 0000000000000000   rcx: ffffffff810013aa   rdx: 0000000000000000
rbx: ffffffff81800010   rsi: 00000000deadbeef   rdi: 00000000deadbeef
rbp: ffffffff8185b528    r8: 0000000000000000    r9: 0000000000000000
r10: 0000000000000000   r11: 0000000000000246   r12: 0000000000000000
r13: ffffffffffffffff   r14: 0000000000000000   r15: 0000000000000000
 cs: e033        ss: e02b        ds: 0000        es: 0000
 fs: 0000 @ 00007f926540c7a0
 gs: 0000 @ ffff88001fec7000/0000000000000000
Code (instr addr ffffffff810013aa)
cc cc cc cc cc cc cc cc cc cc cc 51 41 53 b8 1d 00 00 00 0f 05 <41> 5b 59 c3 cc cc cc cc cc cc cc


Stack:
 0000000000000000 0000000000000000 ffffffff8100795c ffffffff81013ab3
 ffffffff8100b026 ffffffff818ace80 ffffffff818a9700 ffffffff818ace80
 ffffffff81873bd4 0000000000000000 ffffffff818ace80 0000000000000000
 ffffffff81c4e000 0000000000000000 0000000000000000 0000000000000000

Call Trace:
  [<ffffffff810013aa>] hypercall_page+0x3aa  <--
  [<ffffffff8100795c>] xen_safe_halt+0xc
  [<ffffffff81013ab3>] default_idle+0x23
  [<ffffffff8100b026>] cpu_idle+0x96
  [<ffffffff81873bd4>] start_kernel+0x336
  [<ffffffff818760b0>] xen_start_kernel+0x609
root@xenturio1:~# /usr/lib/xen/bin/xenctx -s /boot/System.map-3.1.0-rc2-xenU+ 7 1
rip: ffffffff810013aa hypercall_page+0x3aa
flags: 00001202 i nz
rsp: ffff88001fa75598
rax: 0000000000000000   rcx: ffffffff810013aa   rdx: ffff88001fa755dc
rbx: ffff88001fef11c0   rsi: 00000000deadbeef   rdi: 00000000deadbeef
rbp: 0000000000000017    r8: 0000000000000000    r9: 0720072007200720
r10: 0720072007200720   r11: 0000000000000202   r12: 0000000000000001
r13: 0000000000000001   r14: 0000000000000000   r15: 0000000000000000
 cs: e033        ss: e02b        ds: 0000        es: 0000
 fs: 0000 @ 00007f10582d6700
 gs: 0000 @ ffff88001fee0000/0000000000000000
Code (instr addr ffffffff810013aa)
cc cc cc cc cc cc cc cc cc cc cc 51 41 53 b8 1d 00 00 00 0f 05 <41> 5b 59 c3 cc cc cc cc cc cc cc


Stack:
 0720072007200720 0000000000000000 ffffffff8140b161 0720072007200720
 0000000000000000 ffff88001fa755dc ffffffff00000001 0000000000000000
 0000000e8140b1e9 0000000000000000 ffffffff810096ad 0000000000004473
 ffff88001fef11c0 0000000000000001 0000000000000400 0000000000000001

Call Trace:
  [<ffffffff810013aa>] hypercall_page+0x3aa  <--
  [<ffffffff8140b161>] xen_poll_irq_timeout+0x41
  [<ffffffff810096ad>] xen_spin_lock_slow+0x7d
  [<ffffffff810097f7>] xen_spin_lock+0x57
  [<ffffffff815c198c>] _raw_spin_lock_irq+0xc
  [<ffffffff815bf853>] schedule+0x93
  [<ffffffff81007919>] xen_force_evtchn_callback+0x9
  [<ffffffff81007ff2>] check_events+0x12
  [<ffffffff8104e012>] do_exit+0x722
  [<ffffffff81007fdf>] xen_restore_fl_direct_end
  [<ffffffff815c19a5>] _raw_spin_unlock_irqrestore+0x15
  [<ffffffff8104a191>] kmsg_dump+0x41
  [<ffffffff8100edb8>] oops_end+0xa8
  [<ffffffff81031763>] no_context+0x103
  [<ffffffff81032079>] do_page_fault+0x2a9
  [<ffffffff81397c67>] number+0x2c7
  [<ffffffff815c190a>] rwsem_down_read_failed+0xa
  [<ffffffff810edabd>] shrink_dentry_list+0x46d
  [<ffffffff815c2035>] page_fault+0x25
  [<ffffffff81065887>] kthread_data+0x7
  [<ffffffff8105ff58>] wq_worker_sleeping+0x8
  [<ffffffff815bfbcc>] schedule+0x40c
  [<ffffffff815c1935>] _raw_spin_lock+0x5
  [<ffffffff8104de7a>] do_exit+0x58a
  [<ffffffff81007fdf>] xen_restore_fl_direct_end
  [<ffffffff815c19a5>] _raw_spin_unlock_irqrestore+0x15
  [<ffffffff8100edb8>] oops_end+0xa8
  [<ffffffff8100c8f4>] do_invalid_op+0x84
  [<ffffffff810848f4>] __stop_cpus+0x24
  [<ffffffff810896b0>] synchronize_sched_expedited_cpu_stop
  [<ffffffff815c37eb>] invalid_op+0x1b
  [<ffffffff810896b0>] synchronize_sched_expedited_cpu_stop
  [<ffffffff810896b0>] synchronize_sched_expedited_cpu_stop
  [<ffffffff810848f4>] __stop_cpus+0x24
  [<ffffffff81007919>] xen_force_evtchn_callback+0x9
  [<ffffffff81007ff2>] check_events+0x12
  [<ffffffff810896b0>] synchronize_sched_expedited_cpu_stop
  [<ffffffff81084995>] try_stop_cpus+0x45
  [<ffffffff8108ada3>] synchronize_sched_expedited+0x73
  [<ffffffff814f7b0d>] dev_deactivate_many+0x25d
  [<ffffffff814f01d0>] linkwatch_event
  [<ffffffff814f7b4d>] dev_deactivate+0x2d
  [<ffffffff814efd33>] linkwatch_do_dev+0x73
  [<ffffffff814f0181>] __linkwatch_run_queue+0x1c1
  [<ffffffff814f01d0>] linkwatch_event
  [<ffffffff814f01f0>] linkwatch_event+0x20
  [<ffffffff8105ee91>] process_one_work+0x111
  [<ffffffff81060e37>] worker_thread+0x167
  [<ffffffff81060cd0>] worker_thread
  [<ffffffff81065d16>] kthread+0x96
  [<ffffffff815c3974>] kernel_thread_helper+0x4
  [<ffffffff815c2636>] int_ret_from_sys_call+0x7
  [<ffffffff815c1dbc>] retint_restore_args+0x5
  [<ffffffff815c3970>] kernel_thread_helper