Re: Badram on powerpc
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On 05.06.2012 11:52, Michel Dänzer wrote:
> On Die, 2012-06-05 at 10:32 +0200, HP wrote:
>>
>> 2. On x86 one has memtest86, what do I use on powerpc to check my
>> ram?
>
> 'apt-cache search memtest' brings up the memtester package, but I
> don't know how well that works on PowerMacs.
I remember using this on another ppc machine once. It took a long time
to find the bad ram, as it only could test parts of the memory (and i
never was sure it found all the bad areas). However, as that machine
had multiple RAM-Modules, after some time I was able to identify the
faulting one and replace it.
However, I do not have spare RAM-Modules anymore and new compatible
ones seem to be expensive, too much for my case. Thats why i was
looking for something more reliable than memtest.
If nothing better exists, it must be enough.
>
>
>> a grep in dmesg for address shows: [13111508.893820] Unable to
>> handle kernel paging request for data at address 0x9f58ff44
>> [13111508.903327] Faulting instruction address: 0xc0102848
>> [13111511.947531] Unable to handle kernel paging request for data
>> at address 0x9f58ff4c [13111511.948923] Faulting instruction
>> address: 0xc01045ec [13279566.770278] Unable to handle kernel
>> paging request for data at address 0x9f58ff4c [13279566.771667]
>> Faulting instruction address: 0xc01045ec
>
> I'd kind of expect more random failures if it was bad RAM, I think
> it's more likely this is just a kernel bug. Did these start after
> an upgrade of the kernel or other software?
>
>
A good point, The first oops happened at 4th of june 20:38.
The last update before that was at 17th of april at 14:58, the next
one after the oops at 4th of june 21:39 ( i was updating due to
misbehavng daemon, i only seen the oopses in the logs after that).
Well, today morning i shut down, removed dust and restarted with the
3.2.0-2-powerpc kernel, no trouble so far.
I will keep monitor the situation. Hmm...256MB is a little bit to low
memory....else that raspberrypi thing could replace the system... from
ppc to arm...looks like those non-x86 platforms are keep hunting me ;-)
thanks for the input
HP
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