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




On Jul 29, 2008, at 5:42 PM, Michael Lorenz wrote:

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Hello,

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.

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 :-) In any case, I still have the cross-building setup on my Mac, so I'll try to build a kernel with the second patch.


I've also noticed messages like this printed occasionally:

crime: cpu error 4 at address 4c38444

'illegal address' reported by crime's cpu error interrupt. Probably a speculative read - otherwise you'd get a segfault or a panic. We should probably ignore them since they're bound to happen on R10k and newer CPUs.

That makes sense. I was wondering why everything kept running happily after those messages.




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