from console

... many..
<Feb/12 03:28 pm>[631239.579016] journal commit I/O error
<Feb/12 03:28 pm>[631239.582693] journal commit I/O error
<Feb/12 03:28 pm>[631239.586552] journal commit I/O error

[635525.214459] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000007
[635525.214459] 
[635525.223815] Pid: 1, comm: init Not tainted 3.7.6 #1
[635525.228795] Call Trace:
[635525.236262]  [<ffffffff8151470d>] panic+0xb9/0x1c5
[635525.241162]  [<ffffffff810322fe>] do_exit+0x361/0x7a0
[635525.246317]  [<ffffffff810327af>] do_group_exit+0x72/0x9a
[635525.251820]  [<ffffffff8103c701>] get_signal_to_deliver+0x442/0x461
[635525.258198]  [<ffffffff81002016>] do_signal+0x2c/0x4d6
[635525.263453]  [<ffffffff81024f3a>] ? is_prefetch+0xc1/0x1c2
[635525.269044]  [<ffffffff8103a073>] ? __set_task_blocked+0x60/0x67
[635525.275153]  [<ffffffff810024e7>] do_notify_resume+0x27/0x5f
[635525.280915]  [<ffffffff815176f5>] retint_signal+0x3d/0x78
[635525.287156] ------------[ cut here ]------------
[635525.291914] WARNING: at arch/x86/kernel/smp.c:123 native_smp_send_reschedule+0x25/0x51()
[635525.300153] Hardware name: X8DT3
[635525.303517] Modules linked in: w83793 hwmon_vid ipv6 dm_mod joydev usbhid usb_storage acpi_cpufreq microcode coretemp pcspkr ehci_hcd uhci_hcd i2c_i801 usbcore sg i2c_core ioatdma mptsas igb mptscsih mptbase usb_common scsi_transport_sas ixgbe mdio dca mperf button processor thermal_sys
[635525.330676] Pid: 1, comm: init Not tainted 3.7.6 #1
[635525.335682] Call Trace:
[635525.338261]  <IRQ>  [<ffffffff8102d9a0>] warn_slowpath_common+0x80/0x98
[635525.345103]  [<ffffffff8102d9cd>] warn_slowpath_null+0x15/0x17
[635525.351073]  [<ffffffff8101c53b>] native_smp_send_reschedule+0x25/0x51
[635525.357738]  [<ffffffff81053437>] trigger_load_balance+0x1e8/0x214
[635525.364056]  [<ffffffff8105081f>] scheduler_tick+0x10c/0x114
[635525.369850]  [<ffffffff810385d9>] update_process_times+0x62/0x73
[635525.375994]  [<ffffffff81063222>] tick_sched_timer+0x7c/0x9b
[635525.381791]  [<ffffffff81048b6f>] __run_hrtimer+0x4e/0xc3
[635525.387325]  [<ffffffff81048f10>] hrtimer_interrupt+0xce/0x1b0
[635525.393296]  [<ffffffff8101d921>] smp_apic_timer_interrupt+0x81/0x94
[635525.399787]  [<ffffffff815187ca>] apic_timer_interrupt+0x6a/0x70
[635525.405927]  <EOI>  [<ffffffff8104a36e>] ? up+0x34/0x39
[635525.411373]  [<ffffffff815147dd>] ? panic+0x189/0x1c5
[635525.416558]  [<ffffffff81514742>] ? panic+0xee/0x1c5
[635525.421653]  [<ffffffff810322fe>] do_exit+0x361/0x7a0
[635525.426835]  [<ffffffff810327af>] do_group_exit+0x72/0x9a
[635525.432371]  [<ffffffff8103c701>] get_signal_to_deliver+0x442/0x461
[635525.438776]  [<ffffffff81002016>] do_signal+0x2c/0x4d6
[635525.444049]  [<ffffffff81024f3a>] ? is_prefetch+0xc1/0x1c2
[635525.449665]  [<ffffffff8103a073>] ? __set_task_blocked+0x60/0x67
[635525.455810]  [<ffffffff810024e7>] do_notify_resume+0x27/0x5f
[635525.461604]  [<ffffffff815176f5>] retint_signal+0x3d/0x78
[635525.467133] ---[ end trace 2557196c73b4ffc8 ]---