Stack trace from ipp016 kernel panic
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<Jan/13 12:37 pm>ipp016 login: [ 2934.166426] BUG: unable to handle kernel NULL pointer dereference at 000000000000004f
<Jan/13 12:37 pm>[ 2934.169714] IP: [<ffffffff8023287a>] rebalance_domains+0x6d/0x3f8
<Jan/13 12:37 pm>[ 2934.169714] PGD 22a175067 PUD 22bd81067 PMD 0 
                 <Jan/13 12:37 pm>[ 2934.169714] Oops: 0000 [#1] SMP 
<Jan/13 12:37 pm>[ 2934.169714] last sysfs file: /sys/devices/system/cpu/sched_mc_power_savings
<Jan/13 12:37 pm>[ 2934.169714] CPU 0 
<Jan/13 12:37 pm>[ 2934.169714] Modules linked in: w83627hf hwmon_vid autofs4 smsc37b787_wdt i2c_nforce2 i2c_core k8temp forcedeth tg3 libphy e1000 xfs dm_snapshot dm_mirror dm_region_hash dm_log aacraid 3w_9xxx 3w_xxxx atp870u arcmsr aic7xxx scsi_wait_scan
<Jan/13 12:37 pm>[ 2934.169714] Pid: 0, comm: swapper Not tainted 2.6.28-rc7-00105-gfeaf384 #4
<Jan/13 12:37 pm>[ 2934.169714] RIP: 0010:[<ffffffff8023287a>]  [<ffffffff8023287a>] rebalance_domains+0x6d/0x3f8
<Jan/13 12:37 pm>[ 2934.169714] RSP: 0018:ffffffff80938e40  EFLAGS: 00010286
<Jan/13 12:37 pm>[ 2934.169714] RAX: ffff880135a56480 RBX: ffffffffffffffff RCX: 0000000000000020
<Jan/13 12:37 pm>[ 2934.169714] RDX: ffff8801b5124000 RSI: 0000000000000000 RDI:<Jan/13 12:37 pm>
                 <Jan/13 12:37 pm>[ 2934.169714] RBP: ffffffff80938ee0 R08: 0000000000000020 R09: ffffffff80938ef0
<Jan/13 12:37 pm>[ 2934.169714] R10: 0000000000000001 R11: ffff88002805a180 R12: ffff88002805e480
<Jan/13 12:37 pm>[ 2934.169714] R13: ffffffff8081a130 R14: 0000000000000000 R15: 0000000000000000
<Jan/13 12:37 pm>[ 2934.169714] FS:  00000000432aa950(0000) GS:ffffffff80872d80(0000) knlGS:0000000000000000

<Jan/13 12:37 pm>[ 2934.169714] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
<Jan/13 12:37 pm>[ 2934.169714] CR2: 000000000000004f CR3: 000000022a16d000 CR4: 00000000000006e0
<Jan/13 12:37 pm>[ 2934.169714] DR0: 0000000000000000 DR1: 0000000000000000 DR2:<Jan/13 12:37 pm>
                 <Jan/13 12:37 pm>[ 2934.169714] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
<Jan/13 12:37 pm>[ 2934.169714] Process swapper (pid: 0, threadinfo ffffffff80878000, task ffffffff80792440)
<Jan/13 12:37 pm>[ 2934.169714] Stack:
<Jan/13 12:37 pm>[ 2934.169714]  ffffffff80938eac ffffffff80257376 0000000000000001 0000000300000000
<Jan/13 12:37 pm>[ 2934.169714]  ffff880135a56480 00000001000c5539 0000000000000000 0000000000000002
<Jan/13 12:37 pm>[ 2934.169714]  ffffffff809e3f18 0000000000000000 00000000ffffffff 0000000000000046
<Jan/13 12:37 pm>[ 2934.169714] Call Trace:
<Jan/13 12:37 pm>[ 2934.169714]  <IRQ> <0> [<ffffffff80257376>] ? __lock_acquire+0x788/0x7f3
<Jan/13 12:37 pm>[ 2934.169714]  [<ffffffff8023656e>] run_rebalance_domains+0x88/0xd6
<Jan/13 12:37 pm>[ 2934.169714]  [<ffffffff8023e144>] __do_softirq+0x7a/0x13d
<Jan/13 12:37 pm>[ 2934.169714]  [<ffffffff8020d07c>] ? call_softirq+0x1c/0x28
<Jan/13 12:37 pm>[ 2934.169714]  [<ffffffff8020e028>] ? do_softirq+0x2c/0x68
<Jan/13 12:37 pm>[ 2934.169714]  [<ffffffff8023e084>] ? irq_exit+0x3f/0x85
<Jan/13 12:37 pm>[ 2934.169714]  [<ffffffff8021e66d>] ? smp_apic_timer_interrupt+0x93/0xac
<Jan/13 12:37 pm>[ 2934.169714]  [<ffffffff8020cacb>] ? apic_timer_interrupt+0x6b/0x70
<Jan/13 12:37 pm>[ 2934.169714]  <EOI> <0> [<ffffffff804fa23c>] ? menu_reflect+0x0/0x6d
<Jan/13 12:37 pm>[ 2934.169714]  [<ffffffff803d4b6c>] ? acpi_safe_halt+0x27/0x39
<Jan/13 12:37 pm>[ 2934.169714]  [<ffffffff803d4c25>] ? acpi_idle_enter_c1+0xa7/0xf6
<Jan/13 12:37 pm>[ 2934.169714]  [<ffffffff804f9763>] ? cpuidle_idle_call+0x7f/0xbc

<Jan/13 12:37 pm>[ 2934.169714]  [<ffffffff8020ac41>] ? cpu_idle+0x4a/0x6d
<Jan/13 12:37 pm>[ 2934.169714] Code: 8b 05 2b 50 64 00 48 01 55 80 48 05 50 46 00 00 48 89 45 88 48 8b 45 80 48 8b 98 48 08 00 00 c7 45 90 00 00 00 00 e9 5e 03 00 00 <f6> 43 50 01 0f 84 51 03 00 00 45 85 f6 8b 53 60 74 07 8b 43 30 
<Jan/13 12:37 pm>[ 2934.169714] RIP  [<ffffffff8023287a>] rebalance_domains+0x6d/0x3f8
<Jan/13 12:37 pm>[ 2934.169714]  RSP <ffffffff80938e40>
<Jan/13 12:37 pm>[ 2934.169714] CR2: 000000000000004f
<Jan/13 12:37 pm>[ 2934.475359] Kernel panic - not syncing: Fatal exception in interrupt

File erased !</pre>