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    SubjectRE: [discuss] [OOPS] powernow on smp dual core amd64
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    On Mon, 2005-06-13 at 16:47 -0500, Langsdorf, Mark wrote:
    > Okay, I think I have figured this out. During initialization,
    > the cpufreq infrastruture only initializes the first core of
    > each processor. When a request comes into the second core,
    > it's data structre is unitialized and we get the null point
    > dereference.
    >
    > The solution is to assign the pointer to the data structure for
    > the first core to all the other cores.
    >
    > Tom, could you try this patch and see if it helps?

    Yes! It fixed the panic. I get much further.

    Thanks!

    Unfortunately, after starting cpuspeed daemon, I get this:

    Starting cpuspeed: [ OK ]
    Starting pcmcia: Starting PCMCIA services:
    CPU 6: Machine Check Exception: 4 Bank 4: b200000000070f0f
    TSC 4129a3d70d
    Kernel panic - not syncing: Machine check
    <1>Unable to handle kernel NULL pointer dereference at 00000000000000ff RIP:
    [<00000000000000ff>]
    PGD 41460067 PUD 3f12c067 PMD 0
    Oops: 0010 [1] SMP
    CPU 6
    Modules linked in: video container button battery ac ohci_hcd ehci_hcd i2c_nforce2 i2c_core shpchp usbnet mii dm_snapshot dm_zero dm_mirror ext3 jbd dm_mod sata_nv libata mptscsih mptbase sd_mod scsi_mod
    Pid: 1672, comm: usb.agent Tainted: G M 2.6.12-rc6andro
    RIP: 0010:[<00000000000000ff>] [<00000000000000ff>]
    RSP: 0000:ffff81003fe63fa0 EFLAGS: 00010006
    RAX: ffff81007f5b1fd8 RBX: 0000000000000008 RCX: 0000ffff0000ffff
    RDX: 00000000000000ff RSI: 0000000000000008 RDI: 0000ffff0000ffff
    RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
    R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
    R13: 0000004129a3cf88 R14: ffffffff80370a7d R15: 0000000000000001
    FS: 00002aaaaaae0ee0(0000) GS:ffffffff80498400(0000) knlGS:0000000000000000
    CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
    CR2: 00000000000000ff CR3: 000000003e7e5000 CR4: 00000000000006e0
    Process usb.agent (pid: 1672, threadinfo ffff81007f5b0000, task ffff81007fddcff0)
    Stack: ffffffff8011ac99 ffffffff80370a7d ffffffff8010f247 ffff81007fea2c88 <EOI>
    0000000000000005 0000000000000030 00000000000000fa 0000000000000000
    ffffffff8011a860 0000000000000000
    Call Trace: <IRQ> <ffffffff8011ac99>{smp_call_function_interrupt+73}
    <ffffffff8010f247>{call_function_interrupt+99} <EOI> <#MC> <ffffffff8011a860>{smp_really_stop_cpu+0}
    <ffffffff8011aa68>{smp_send_stop+72} <ffffffff80136ebc>{panic+140}
    <ffffffff80115ce8>{print_mce+136} <ffffffff80115db9>{mce_panic+137}
    <ffffffff8011643f>{do_machine_check+767} <ffffffff8010facb>{machine_check+127}
    <ffffffff8010f24c>{apic_timer_interrupt+0} <EOE> <ffffffff801224dc>{do_page_fault+1196}
    <ffffffff801224d9>{do_page_fault+1193} <ffffffff8018c14e>{sys_newstat+46} <ffffffff8010f401>{error_exit+0}

    Code: Bad RIP value.
    RIP [<00000000000000ff>] RSP <ffff81003fe63fa0>
    CR2: 00000000000000ff
    <0>Kernel panic - not syncing: Oops

    The machine resets itself after this.

    -tduffy
    [unhandled content-type:application/pgp-signature]
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