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    SubjectRe: 2.6.3 doesn't see my 2nd CPU
    I found a BIOS upgrade.  Alas, no luck.  WIth acpi=force, I get more output,
    (and recognition that a processor #1 exists), but I have the same crash in the
    dmesg log and only 1 CPU is actually recognized.

    Linux version 2.6.3-gentoo-r1 (root@littlegreenmen) (gcc version 3.2.3 20030422 (Gentoo Linux 1.4 3.2.3-r3, propolice)) #1 SMP Fri Feb 20 16:54:42 PST 2004
    BIOS-provided physical RAM map:
    BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
    BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
    BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
    BIOS-e820: 0000000000100000 - 000000003ffe0000 (usable)
    BIOS-e820: 000000003ffe0000 - 000000003fff8000 (ACPI data)
    BIOS-e820: 000000003fff8000 - 0000000040000000 (ACPI NVS)
    BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
    BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
    BIOS-e820: 00000000fffc0000 - 0000000100000000 (reserved)
    127MB HIGHMEM available.
    896MB LOWMEM available.
    ACPI: S3 and PAE do not like each other for now, S3 disabled.
    found SMP MP-table at 000fb560
    hm, page 000fb000 reserved twice.
    hm, page 000fc000 reserved twice.
    hm, page 000f6000 reserved twice.
    hm, page 000f7000 reserved twice.
    On node 0 totalpages: 262112
    DMA zone: 4096 pages, LIFO batch:1
    Normal zone: 225280 pages, LIFO batch:16
    HighMem zone: 32736 pages, LIFO batch:7
    DMI 2.1 present.
    ACPI: RSDP (v000 AMI ) @ 0x000fb340
    ACPI: RSDT (v001 OEMTYN OEMTYNTB 0x00000009 AMI 0x00000001) @ 0x3fff0000
    ACPI: FADT (v001 OEMTYN OEMTYNTB 0x00000009 AMI 0x00000001) @ 0x3fff1000
    ACPI: MADT (v001 OEMTYN OEMTYNTB 0x00000009 AMI 0x00000001) @ 0x3fff2000
    ACPI: DSDT (v001 OEMTYN OEMTYNTB 0x00000012 MSFT 0x0100000c) @ 0x00000000
    ACPI: Local APIC address 0xfee00000
    ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
    Processor #0 6:8 APIC version 17
    ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled)
    Processor #1 6:8 APIC version 17
    ACPI: IOAPIC (id[0x02] address[0xfec00000] global_irq_base[0x0])
    IOAPIC[0]: Assigned apic_id 2
    IOAPIC[0]: apic_id 2, version 17, address 0xfec00000, IRQ 0-23
    ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
    ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 20 high level)
    Enabling APIC mode: Flat. Using 1 I/O APICs
    Using ACPI (MADT) for SMP configuration information
    Built 1 zonelists
    Kernel command line: BOOT_IMAGE=2.6.3-g-r1 ro root=2141 acpi=force
    Initializing CPU#0
    PID hash table entries: 4096 (order 12: 32768 bytes)
    Detected 801.837 MHz processor.
    Using tsc for high-res timesource
    Console: colour dummy device 80x25
    Memory: 1032720k/1048448k available (2183k kernel code, 14832k reserved, 725k data, 176k init, 130944k highmem)
    Checking if this processor honours the WP bit even in supervisor mode... Ok.
    Calibrating delay loop... 1585.15 BogoMIPS
    Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
    Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
    Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
    CPU: After generic identify, caps: 0383fbff 00000000 00000000 00000000
    CPU: After vendor identify, caps: 0383fbff 00000000 00000000 00000000
    CPU: L1 I cache: 16K, L1 D cache: 16K
    CPU: L2 cache: 256K
    CPU: After all inits, caps: 0383fbff 00000000 00000000 00000040
    Intel machine check architecture supported.
    Intel machine check reporting enabled on CPU#0.
    Enabling fast FPU save and restore... done.
    Enabling unmasked SIMD FPU exception support... done.
    Checking 'hlt' instruction... OK.
    POSIX conformance testing by UNIFIX
    CPU0: Intel Pentium III (Coppermine) stepping 03
    per-CPU timeslice cutoff: 732.15 usecs.
    task migration cache decay timeout: 1 msecs.
    enabled ExtINT on CPU#0
    ESR value before enabling vector: 00000004
    ESR value after enabling vector: 00000000
    Booting processor 1/1 eip 2000
    Unable to handle kernel paging request<1>Unable to handle kernel paging request at virtual address 3f83ec0d
    printing eip:
    *pde = 00000000
    Oops: 0000 [#1]
    CPU: 0
    EIP: 0060:[<3f83ec0d>] Not tainted
    EFLAGS: 00010082
    EIP is at 0x3f83ec0d
    eax: c1b3c000 ebx: 00000000 ecx: 00000001 edx: 00100100
    esi: 00000000 edi: 00000026 ebp: 00000000 esp: c8008204
    ds: 007b es: 007b ss: 0068
    Process (pid: 0, threadinfo=c8008000 task=3000801c)
    Stack: c027abeb c1b3c000 00000002 c03a0b80 c027e74b 00000000 00000000 00000000
    00000000 00000000 00000000 00000000 c03a0b80 00000026 00000efb 00000001
    c012616f c03a0b80 c040c79b 00000026 00000f21 00000f21 00000efb c012627f
    Call Trace:
    [<c027abeb>] hide_cursor+0x2b/0x50
    [<c027e74b>] vt_console_print+0x32b/0x350
    [<c012616f>] __call_console_drivers+0x5f/0x70
    [<c012627f>] call_console_drivers+0x6f/0x130
    [<c0126632>] release_console_sem+0x62/0xf0
    [<c0126532>] printk+0x182/0x1d0
    [<c011d144>] do_page_fault+0x154/0x53a
    [<c011cff0>] do_page_fault+0x0/0x53a
    [<c010a1dd>] error_code+0x2d/0x38

    Code: Bad EIP value.
    <0>Kernel panic: Fatal exception in interrupt
    In interrupt handler - not syncing
    Stuck ??
    CPU #1 not responding - cannot use it.
    Total of 1 processors activated (1585.15 BogoMIPS).
    On Fri, Feb 20, 2004 at 08:22:24PM -0800, Andrew Morton wrote:
    > Phil White <> wrote:
    > >
    > > ACPI disabled because your bios is from 99 and too old
    > > You can enable it with acpi=force
    > Did you try acpi=force? Look for a bios upgrade, too.
    > -
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