Re: Help with machine check exception

[Orion Poplawski <orion@cora.nwra.com>]

Alan Cox wrote:
> On Iau, 2006-01-12 at 10:07 -0700, Orion Poplawski wrote:
> > mcelog decode states:
> >
> > CPU 0 4 northbridge TSC 184fcd0553e4
> >    Northbridge Watchdog error
> >         bit57 = processor context corrupt
> >         bit61 = error uncorrected
> >    bus error 'generic participation, request timed out
> >        generic error mem transaction
> >        generic access, level generic'
> > STATUS b200000000070f0f MCGSTATUS 4
> > Kernel panic - not syncing: Machine check
>
> Could be ram cpu or motherboard, even a power glitch of course.
>
> Before you panic I'd suggest that you check the machine is being
> adequately cooled (especially the CPU) and that the ram and cpu are all
> well socketed.
>
> memtest86+ will help test for memory problems and may be worth an
> overnight run

Well, I've swapped memory with an identical machine and the problem 
stayed where it was.  The crash is fairly frequent (about 1-2 days of 
operating).

adm1027-i2c-0-2e
Adapter: SMBus AMD8111 adapter at 10e0
V1.5:      +2.601 V  (min =  +1.42 V, max =  +1.58 V)   ALARM
VCore:     +1.304 V  (min =  +1.48 V, max =  +1.63 V)   ALARM
V3.3:      +3.326 V  (min =  +3.13 V, max =  +3.47 V)
V5:       +5.117 V  (min =  +4.74 V, max =  +5.26 V)
V12:      +12.094 V  (min = +11.38 V, max = +12.62 V)
CPU_Fan:      0 RPM  (min = 4000 RPM)                     ALARM
fan2:         0 RPM  (min =    0 RPM)
fan3:         0 RPM  (min =    0 RPM)
fan4:      4981 RPM  (min =    0 RPM)
CPU:      +50.00°C  (low  =   +10°C, high =   +50°C)
Board:    +34.00°C  (low  =   +10°C, high =   +35°C)
Remote:   +52.50°C  (low  =   +10°C, high =   +35°C)     ALARM
CPU_PWM:   255
Fan2_PWM:  255
Fan3_PWM:  255
vid:      +1.550 V  (VRM Version 9.1)


I would have expected 2 CPU temps (being dual-processor).  Maybe Remote 
is the second.

With 4 copies of burnK7:

machine with problems:

CPU:      +71.25°C  (low  =   +10°C, high =   +50°C)     ALARM
Board:    +47.25°C  (low  =   +10°C, high =   +35°C)     ALARM
Remote:   +68.50°C  (low  =   +10°C, high =   +35°C)     ALARM

machine without:

CPU:      +61.25°C  (low  =   +10°C, high =   +50°C)     ALARM
Board:    +47.25°C  (low  =   +10°C, high =   +35°C)     ALARM
Remote:   +74.25°C  (low  =   +10°C, high =   +35°C)     ALARM


So *maybe* cooling?




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