Re: cpu error 4 (was: Re: O2 framebuffer problems with install kernel)

Hi,

On Jul 29, 2008, at 8:57 PM, Michael Lorenz wrote:

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> Hello,
>
> On Jul 29, 2008, at 12:15, Jorge Acereda Maciá wrote:
>
>> On Jul 29, 2008, at 5:42 PM, Michael Lorenz wrote:
>>
>>> On Jul 29, 2008, at 11:23, Jorge Acereda Maciá wrote:
>>>
>>>> With the first patch (the one using BUS_DMA_COHERENT), I get  
>>>> constant reboots, usually under heavy IO load (probably an  
>>>> unrelated problem).
>>>
>>> Lots of network traffic on the onboard interface?
>>
>> Yes, I'll try to isolate if it's due to network IO or disk IO.
>
> My bet is on mec - even if it works right it's not very fast and  
> doesn't do stuff like checksums in hw. If you've got a PCI ethernet  
> board sitting around - I can personally vouch for 3com 3c905 based  
> cards to work just fine, others used DEC 2114x clones.

I'm right now building a kernel on the O2 and installing some pre- 
fetched stuff from pkgsrc at the same time. It has been running for  
quite a while and no hangs so far, so you're probably right.
After that I'll try to do some heavy network IO.


> In theory anything supported by NetBSD should work but since the O2  
> is a little more ticklish than - say, macppc and sparc - regarding  
> DMA and cache synchronization ( macppc for instance is always DMA  
> coherent ) I'd expect occasional trouble.
>
>>> Any change with the 2nd patch?
>>
>> Well, I wanted to keep that machine self-hosting and so far I've  
>> been unable to checkout the kernel sources :-)
>
> Eh, you won't be impressed by build times.

Indeed. My 68030@50 Amiga compiled faster (well, probably the reason  
is that gcc2 is much faster than gcc4)