[  306.421101] stopped custom tracer.
[  306.421104]
[  306.421105] =============================================
[  306.428266] [ INFO: possible recursive locking detected ]
[  306.433903] [ 2.6.23.1-rt5 #12
[  306.437166] ---------------------------------------------
[  306.442767] qemu-system-x86/4058 is trying to acquire lock:
[  306.448552]  ((struct rw_semaphore *)(&mm->mmap_sem)){----}, at: [<ffffffff881b72cb>] gfn_to_page+0x66/0x106 [kvm]
[  306.459504]
[  306.459504] but task is already holding lock:
[  306.465545]  ((struct rw_semaphore *)(&mm->mmap_sem)){----}, at: [<ffffffff8122c229>] do_page_fault+0x3cb/0x80a
[  306.476127]
[  306.476128] other info that might help us debug this:
[  306.482930] 1 lock held by qemu-system-x86/4058:
[  306.487734]  #0:  ((struct rw_semaphore *)(&mm->mmap_sem)){----}, at: [<ffffffff8122c229>] do_page_fault+0x3cb/0x80a
[  306.498759]
[  306.498760] stack backtrace:
[  306.503311]
[  306.503311] Call Trace:
[  306.507371]  [<ffffffff81054894>] __lock_acquire+0x1c5/0xc7e
[  306.513240]  [<ffffffff8105539e>] lock_acquire+0x51/0x6a
[  306.518763]  [<ffffffff881b72cb>] :kvm:gfn_to_page+0x66/0x106
[  306.524708]  [<ffffffff81059c16>] __rt_down_read+0x1f/0x5e
[  306.530429]  [<ffffffff881b72cb>] :kvm:gfn_to_page+0x66/0x106
[  306.536413]  [<ffffffff881ba4e1>] :kvm:kvm_vm_nopage+0x26/0x48
[  306.542467]  [<ffffffff81081e6b>] __do_fault+0x89/0x499
[  306.547923]  [<ffffffff81080edb>] inc_zone_page_state+0x53/0x5a
[  306.554023]  [<ffffffff8108587e>] handle_mm_fault+0x52b/0x9e3
[  306.559928]  [<ffffffff8122c229>] do_page_fault+0x3cb/0x80a
[  306.565734]  [<ffffffff8122c2da>] do_page_fault+0x47c/0x80a
[  306.571450]  [<ffffffff812290dd>] rt_spin_unlock+0x17/0x47
[  306.577142]  [<ffffffff8122a5ad>] error_exit+0x0/0x96
[  306.582345]  [<ffffffff81074361>] file_read_actor+0x2b/0x182
[  306.588259]  [<ffffffff810751c1>] do_generic_mapping_read+0x1a2/0x3f8
[  306.594944]  [<ffffffff81074336>] file_read_actor+0x0/0x182
[  306.600694]  [<ffffffff81076b84>] generic_file_aio_read+0x12c/0x16f
[  306.607120]  [<ffffffff8109ea64>] do_sync_read+0xcc/0x10f
[  306.612773]  [<ffffffff810f8fff>] inode_has_perm+0x65/0x72
[  306.618418]  [<ffffffff81049e28>] autoremove_wake_function+0x0/0x2e
[  306.624931]  [<ffffffff810f90a9>] file_has_perm+0x9d/0xac
[  306.630421]  [<ffffffff8109f338>] vfs_read+0xd4/0x185
[  306.635640]  [<ffffffff8109f758>] sys_read+0x48/0x74
[  306.640819]  [<ffffffff8100bef7>] tracesys+0xdc/0xe1
[  306.645920]
[  306.647484] INFO: lockdep is turned off.
[  306.651544] ---------------------------
[  306.655510] | preempt count: 00000000 ]
[  306.659497] | 0-level deep critical section nesting:
[  306.664689] ----------------------------------------
[  306.669856]