crash w/in 24hr again with similar error. from console

<Oct/22 09:04 am>ipp023 login: [34023.889768] 
<Oct/22 09:04 am>[34023.889768] HARDWARE ERROR
<Oct/22 09:04 am>[34023.889769] CPU 5: Machine Check Exception:                4 Bank 2: b200000000000014
<Oct/22 09:04 am>[34023.891390] TSC 630e0fe8f258 
<Oct/22 09:04 am>[34023.891390] This is not a software problem!
<Oct/22 09:04 am>[34023.891390] Run through mcelog --ascii to decode and contact your hardware vendor
<Oct/22 09:04 am>[34023.891390] 
<Oct/22 09:04 am>[34023.891390] HARDWARE ERROR
<Oct/22 09:04 am>[34023.891390] CPU 7: Machine Check Exception:                5 Bank 5: b200000802000e0f
<Oct/22 09:04 am>[34023.891390] RIP !INEXACT! 33:<0000000000401e1a> 
<Oct/22 09:04 am>[34023.891390] TSC 630e0fe8f398 
<Oct/22 09:04 am>[34023.891390] This is not a software problem!
<Oct/22 09:04 am>[34023.891390] Run through mcelog --ascii to decode and contact your hardware vendor
<Oct/22 09:04 am>[34023.891390] 

<Oct/22 09:04 am>[34023.891390] HARDWARE ERROR
<Oct/22 09:04 am>[34023.891390] CPU 5: Machine Check Exception:                4
<Oct/22 09:04 am>0c000e0f
                 <Oct/22 09:04 am>[34023.891390] TSC 630e0fe8fef0 
<Oct/22 09:04 am>[34023.891390] This is not a software problem!
<Oct/22 09:04 am>[34023.971215] Run through mcelog --ascii to decode and contact your hardware vendor
<Oct/22 09:04 am>[34023.971215] Kernel panic - not syncing: Machine check
<Oct/22 09:04 am>[34023.971215] ------------[ cut here ]------------
<Oct/22 09:04 am>[34023.971215] WARNING: at kernel/smp.c:333 smp_call_function_mask+0x37/0x1d7()
<Oct/22 09:04 am>[34023.971215] Modules linked in: coretemp w83627hf w83793 hwmon_vid k8temp autofs4 i2c_i801 iTCO_wdt i2c_core e1000e tg3 libphy e1000 xfs dm_snapshot dm_mirror dm_region_hash dm_log aacraid 3w_9xxx 3w_xxxx atp870u arcmsr aic7xxx scsi_wait_scan
<Oct/22 09:04 am>[34023.971215] Pid: 20008, comm: gzip Tainted: G   M    W  2.6.28-rc7-00105-gfeaf384 #4
<Oct/22 09:04 am>[34023.971215] Call Trace:
<Oct/22 09:04 am>[34023.971215]  <#MC>  [<ffffffff802397db>] warn_on_slowpath+0x51/0x6d
<Oct/22 09:04 am>[34023.971215]  [<ffffffff803eec86>] notify_update+0x2b/0x30
<Oct/22 09:04 am>[34023.971215]  [<ffffffff8025bc31>] smp_call_function_mask+0x37/0x1d7
<Oct/22 09:04 am>[34023.971215]  [<ffffffff80264013>] crash_kexec+0x17/0xef
<Oct/22 09:04 am>[34023.971215]  [<ffffffff802640e2>] crash_kexec+0xe6/0xef
                 <Oct/22 09:04 am>[34023.971215]  [<ffffffff8021d53e>] native_smp_send_stop+0x1a/0x26
<Oct/22 09:04 am>[34023.971215]  [<ffffffff80239896>] panic+0x95/0x13f
<Oct/22 09:04 am>[34023.971215]  [<ffffffff80239d5d>] release_console_sem+0x3e/0x1a5
<Oct/22 09:04 am>[34023.971215]  [<ffffffff80239d5d>] release_console_sem+0x3e/0x1a5
<Oct/22 09:04 am>[34023.971215]  [<ffffffff80239d5d>] release_console_sem+0x3e/0x1a5
<Oct/22 09:04 am>[34023.971215]  [<ffffffff805b9e66>] __atomic_notifier_call_chain+0x74/0x83

<Oct/22 09:04 am>[34023.971215]  [<ffffffff805b9df2>] __atomic_notifier_call_chain+0x0/0x83
<Oct/22 09:04 am>[34023.971215]  [<ffffffff8023969e>] oops_enter+0x9/0x10
<Oct/22 09:04 am>[34023.971215]  [<ffffffff80217b55>] mce_log+0x0/0x7f
<Oct/22 09:04 am>[34023.971215]  [<ffffffff80217eef>] do_machine_check+0x2d5/0x378
<Oct/22 09:04 am>[34023.971215]  [<ffffffff8020d04f>] machine_check+0x7f/0x90
<Oct/22 09:04 am>[34023.971215]  <<EOE>> <4>---[ end trace 4eaa2a86a8e2da22 ]---