Re: Problems with AMD64 and 8 GB RAM?

From: Greg 'groggy' Lehey (grog_at_FreeBSD.org)
Date: 03/31/05

  • Next message: Jon Noack: "Re: Problems with AMD64 and 8 GB RAM?" 
    Date: Thu, 31 Mar 2005 14:44:58 +0930
To: Scott Long <scottl@samsco.org>

    [gratuitous empty lines removed]

    On Wednesday, 30 March 2005 at 21:28:36 -0700, Scott Long wrote:
    > Greg 'groggy' Lehey wrote:
    >> On Wednesday, 30 March 2005 at 23:01:03 -0500, John Baldwin wrote:
    >>
    >>> On Mar 30, 2005, at 8:54 PM, Greg 'groggy' Lehey wrote:
    >>>
    >>>>> lapic0: LINT1 trigger: edge
    >>>>> lapic0: LINT1 polarity: high
    >>>>> lapic1: Routing NMI -> LINT1
    >>>>> lapic1: LINT1 trigger: edge
    >>>>> lapic1: LINT1 polarity: high
    >>>>> -ioapic0 <Version 0.3> irqs 0-23 on motherboard
    >>>>> +ioapic0 <Version 0.0> irqs 0-23 on motherboard
    >>>>> cpu0 BSP:
    >>>>> ID: 0x00000000 VER: 0x00040010 LDR: 0x01000000 DFR: 0x0fffffff
    >>>>> lint0: 0x00010700 lint1: 0x00000400 TPR: 0x00000000 SVR: 0x000001ff
    >>>
    >>> This shows that in the - case the APIC is broken somehow (0.0 isn't a
    >>> valid I/O APIC version).
    >>
    >> You mean the + case, I suppose. Yes, that's what I suspected.
    >>
    >>> It would seem that the system has mapped RAM over top of the I/O
    >>> APIC perhaps?
    >>
    >> That's what I suspected too, but imp doesn't think so.
    >
    > I'd be more inclined to believe that there is an erroneous mapping
    > by the OS, not that things are fundamentally broken in hardware.

    Agreed. This has been my favourite hypothesis all along. But isn't
    that what jhb is saying?

    > Your SMAP table shows everything correctly. It's becoming hard to
    > break through your pre-concieved notions here and explain how things
    > actually work.

    No, there's nothing to break through. I think you're just having
    problems

    1. expressing yourself, and
    2. understanding what I'm saying.

    I have no preconceived notions. All I can see here is an antagonistic
    attitude on your part. What's the problem? You'll recall from my
    first message that I asked for suggestions about how to approach the
    issue. jhb provided some; you haven't so far. From what you've
    written, it's unclear whether you disagree with jhb or not. If you
    do, why? If you don't, what's your point here?

    >>> It would be interesting to see the contents of your MADT to see if
    >>> it's trying to use a 64-bit PA for your APIC.
    >>
    >> Any suggestions about how to do so?
    >
    > man acpidump

    How do you run that on a system that won't boot?

    Greg 

    --
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  • Next message: Jon Noack: "Re: Problems with AMD64 and 8 GB RAM?"

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