Created attachment 518492 [details]
Output of 'dmesg'

Description of problem:
Noticed this in dmesg, I believe after I exited from qemu-kvm guest (Win7).

Full output of 'dmesg' attached.


[ 2010.350045] ------------[ cut here ]------------
[ 2010.350054] WARNING: at kernel/lockdep.c:3114 match_held_lock+0x93/0xcb()
[ 2010.350056] Hardware name: 74585FU
[ 2010.350058] Modules linked in: fuse ip6table_filter ip6_tables ebtable_nat ebtables ppdev parport_pc lp parport ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack xt_CHECKSUM iptable_mangle tun bridge stp llc usblp arc4 uvcvideo videodev media snd_usb_audio snd_usbmidi_lib snd_rawmidi v4l2_compat_ioctl32 microcode snd_hda_codec_conexant i2c_i801 snd_hda_intel iTCO_wdt iTCO_vendor_support iwlagn snd_hda_codec thinkpad_acpi snd_hwdep snd_seq snd_seq_device mac80211 snd_pcm cfg80211 rfkill snd_timer snd soundcore snd_page_alloc e1000e virtio_net kvm_intel kvm uinput wmi i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan]
[ 2010.350120] Pid: 2392, comm: qemu-kvm Not tainted 3.1.0-0.rc2.git0.1.fc17.x86_64 #1
[ 2010.350122] Call Trace:
[ 2010.350123]  <IRQ>  [<ffffffff8105c520>] warn_slowpath_common+0x83/0x9b
[ 2010.350133]  [<ffffffff8108989c>] ? tick_nohz_handler+0xdf/0xdf
[ 2010.350136]  [<ffffffff8105c552>] warn_slowpath_null+0x1a/0x1c
[ 2010.350139]  [<ffffffff8108bc81>] match_held_lock+0x93/0xcb
[ 2010.350142]  [<ffffffff8108bd0f>] lock_is_held+0x56/0x95
[ 2010.350147]  [<ffffffff8104c9ce>] rcu_read_lock_sched_held+0x2e/0x5c
[ 2010.350150]  [<ffffffff8104ce51>] on_null_domain+0x3b/0x64
[ 2010.350154]  [<ffffffff81056fb0>] scheduler_tick+0x235/0x242
[ 2010.350159]  [<ffffffff8106b090>] update_process_times+0x65/0x75
[ 2010.350162]  [<ffffffff81089911>] tick_sched_timer+0x75/0x9e
[ 2010.350166]  [<ffffffff8107dc84>] __run_hrtimer+0xed/0x1db
[ 2010.350169]  [<ffffffff8107e4be>] hrtimer_interrupt+0xe0/0x1aa
[ 2010.350174]  [<ffffffff8112b5d7>] ? do_mmu_notifier_register+0xc2/0x129
[ 2010.350179]  [<ffffffff81502a4c>] smp_apic_timer_interrupt+0x77/0x8a
[ 2010.350183]  [<ffffffff81500933>] apic_timer_interrupt+0x73/0x80
[ 2010.350185]  <EOI>  [<ffffffff8108ad1f>] ? arch_local_irq_restore+0x6/0xd
[ 2010.350192]  [<ffffffff8108f01d>] lock_acquire+0x10f/0x13e
[ 2010.350195]  [<ffffffff8112b5d7>] ? do_mmu_notifier_register+0xc2/0x129
[ 2010.350199]  [<ffffffff814f863d>] _raw_spin_lock+0x45/0x79
[ 2010.350203]  [<ffffffff8112b5d7>] ? do_mmu_notifier_register+0xc2/0x129
[ 2010.350207]  [<ffffffff8112b5d7>] do_mmu_notifier_register+0xc2/0x129
[ 2010.350210]  [<ffffffff8112b663>] mmu_notifier_register+0x13/0x15
[ 2010.350227]  [<ffffffffa00d3644>] kvm_dev_ioctl+0x257/0x3a9 [kvm]
[ 2010.350231]  [<ffffffff81151911>] do_vfs_ioctl+0x472/0x4b3
[ 2010.350235]  [<ffffffff811519a8>] sys_ioctl+0x56/0x7a
[ 2010.350239]  [<ffffffff814ffdc2>] system_call_fastpath+0x16/0x1b
[ 2010.350241] ---[ end trace 3255324da92784ee ]---


Version-Release number of selected component (if applicable):
kernel-3.1.0-0.rc2.git0.1.fc17.x86_64

How reproducible:


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Actual results:


Expected results:


Additional info: