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Am Samstag 06 Juni 2009 schrieb Volker Armin Hemmann: |
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> *sigh* Ok, just for starters - all AMD cpus of the Athlon64 architecture |
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> have a builtin agpgart. This agpgart functions also as an iommu. This is |
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> a great hack to have a hardware iommu . Intel does not have this, so they |
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> rely on software. The solution came up while AMD devs and linux kernel |
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> devs worked together. |
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> Please read the following links: |
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> |
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> http://en.wikipedia.org/wiki/Iommu |
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> |
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> http://marc.info/?l=linux-kernel&m=107759901509280&w=2 |
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> |
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> http://marc.info/?l=linux-kernel&m=107764033904042&w=2 |
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> |
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> the iommu is needed so 32bit pci devices can live with their pci adress |
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> space behind 4gb and other sweet things. |
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> |
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> Sadly the iommu needs a minimum on memory for itself - and uses the agp- |
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> aperture. This is fine, but mobo vendors suck and make it too small/or |
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> not available. In that case the kernel is forced to use real memory for |
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> the iommu. |
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> |
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> In short, that message has nothing to do with your problem. |
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> |
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Thanks for these informative links |
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|
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> The NR_CPU message is confusing - I strongly suspect that your kernel |
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> config is really fucked uo. |
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|
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?? As I have a DualCore-Cpu, I changed NR_CPU to 2, something wrong with |
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that? What else can be fucked up? I Enabled Multi-core scheduler |
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(hyperthread is disabled) |
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|
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> |
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> Please enable: |
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> |
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> [] Check for low memory corruption |
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> [] Reserve low 64K of RAM on AMI/Phoenix BIOSen |
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> |
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> in the kernel config. Also clean it up and remove stuff like |
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> 'hyperthreading scheduler'. |
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> |
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Already done. |
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|
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> If the problem persists, start testing your hardware. |
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> |
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How? I don't have access to special test equipment to test hardware. This is |
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the only AM2(+) board and the only AM2 CPU I have. The RAM is also unique |
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to this machine. |
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> I would suspect the PSU. |
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|
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The Powersupply? What makes you think that the PSU can be the cause of a |
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system crash? |
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|
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Greetings |
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Alex |