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    SubjectRe: [PATCH] Make Intel 8-way Xeons boot again
    On Sat, Jan 09, 2010 at 01:13:39PM -0800, Yinghai Lu wrote:
    > On Sat, Jan 9, 2010 at 2:10 AM, Ananth N Mavinakayanahalli
    > <ananth@in.ibm.com> wrote:
    > > On an 8-way system with Intel Xeon X7350 CPUs, booting 2.6.32 or newer
    > > kernels fails at:
    > >
    > > ...
    > > CPU0: Intel(R) Xeon(R) CPU           X7350  @ 2.93GHz stepping 0b
    > > Booting Node   0, Processors  #1 #2 #3 #4 #5 #6 #7 Ok.
    > > Brought up 8 CPUs
    > > Total of 8 processors activated (46906.05 BogoMIPS).
    > >
    > > Git bisect showed 2fbd07a5f as the offending commit.
    > >
    > > With the patch below, I am able to boot the latest Linus' git tree on
    > > the machine. If this patch is correct, it needs to get into the stable
    > > tree too.
    > >
    > > Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
    > > ---
    > > Index: linux-2.6/arch/x86/kernel/apic/probe_64.c
    > > ===================================================================
    > > --- linux-2.6.orig/arch/x86/kernel/apic/probe_64.c      2010-01-09 14:54:29.000000000 +0530
    > > +++ linux-2.6/arch/x86/kernel/apic/probe_64.c   2010-01-09 14:57:53.000000000 +0530
    > > @@ -70,7 +70,7 @@
    > >        if (apic == &apic_flat) {
    > >                switch (boot_cpu_data.x86_vendor) {
    > >                case X86_VENDOR_INTEL:
    > > -                       if (num_processors > 8)
    > > +                       if (num_processors >= 8)
    > >                                apic = &apic_physflat;
    > >                        break;
    > >                case X86_VENDOR_AMD:
    >
    > can you send out whole bootlog with apic=debug?

    Here it is:

    Linux version 2.6.33-rc3-bsect (ananth@llm69.in.ibm.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-46)) #1 SMP Sun Jan 10 07:36:02 IST 2010
    Command line: ro root=LABEL=/ rhgb console=tty0 console=ttyS0,9600n1 apic=debug
    BIOS-provided physical RAM map:
    BIOS-e820: 0000000000000000 - 000000000009bc00 (usable)
    BIOS-e820: 000000000009bc00 - 00000000000a0000 (reserved)
    BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
    BIOS-e820: 0000000000100000 - 00000000bff4b480 (usable)
    BIOS-e820: 00000000bff4b480 - 00000000bff57b40 (ACPI data)
    BIOS-e820: 00000000bff57b40 - 00000000c0000000 (reserved)
    BIOS-e820: 00000000d0000000 - 00000000e0000000 (reserved)
    BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved)
    BIOS-e820: 0000000100000000 - 0000000840000000 (usable)
    NX (Execute Disable) protection: active
    DMI 2.4 present.
    No AGP bridge found
    last_pfn = 0x840000 max_arch_pfn = 0x400000000
    x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
    last_pfn = 0xbff4b max_arch_pfn = 0x400000000
    Scan SMP from ffff880000000000 for 1024 bytes.
    Scan SMP from ffff88000009fc00 for 1024 bytes.
    Scan SMP from ffff8800000f0000 for 65536 bytes.
    Scan SMP from ffff88000009bc00 for 1024 bytes.
    found SMP MP-table at [ffff88000009bd40] 9bd40
    mpc: 9d920-9dc84
    init_memory_mapping: 0000000000000000-00000000bff4b000
    init_memory_mapping: 0000000100000000-0000000840000000
    RAMDISK: 37d4d000 - 37fef9e3
    ACPI: RSDP 000000000009bde0 00014 (v00 M IB)
    ACPI: RSDT 00000000bff57ac0 00044 (v01 IBM EXA01ZEU 00001000 IBM 45444F43)
    ACPI: FACP 00000000bff57900 000F4 (v03 IBM EXA01ZEU 00001000 IBM 45444F43)
    ACPI: DSDT 00000000bff4b480 021B5 (v01 IBM EXA01ZEU 00001000 INTL 20060707)
    ACPI: FACS 00000000bff53780 00040
    ACPI: APIC 00000000bff57800 000F4 (v01 IBM EXA01ZEU 00001000 IBM 45444F43)
    ACPI: SRAT 00000000bff57700 00100 (v01 IBM EXA01ZEU 00001000 IBM 45444F43)
    ACPI: HPET 00000000bff576c0 00038 (v01 IBM EXA01ZEU 00001000 IBM 45444F43)
    ACPI: TCPA 00000000bff57640 00064 (v02 IBM EXA01ZEU 00001000 IBM 45444F43)
    ACPI: MCFG 00000000bff57600 0003C (v01 IBM EXA01ZEU 00001000 IBM 45444F43)
    ACPI: ERST 00000000bff537c0 00230 (v01 IBM EXA01ZEU 00001000 IBM 45444F43)
    ACPI: SSDT 00000000bff4d640 05686 (v01 IBM VIGSSDT0 00001000 INTL 20060707)
    SRAT: PXM 0 -> APIC 0x0c -> Node 0
    SRAT: PXM 0 -> APIC 0x10 -> Node 0
    SRAT: PXM 0 -> APIC 0x0d -> Node 0
    SRAT: PXM 0 -> APIC 0x11 -> Node 0
    SRAT: PXM 0 -> APIC 0x0e -> Node 0
    SRAT: PXM 0 -> APIC 0x12 -> Node 0
    SRAT: PXM 0 -> APIC 0x0f -> Node 0
    SRAT: PXM 0 -> APIC 0x13 -> Node 0
    SRAT: Node 0 PXM 0 0-c0000000
    SRAT: Node 0 PXM 0 100000000-840000000
    Bootmem setup node 0 0000000000000000-0000000840000000
    NODE_DATA [0000000000028000 - 000000000002efff]
    bootmap [0000000000100000 - 0000000000207fff] pages 108
    (13 early reservations) ==> bootmem [0000000000 - 0840000000]
    #0 [0000000000 - 0000001000] BIOS data page ==> [0000000000 - 0000001000]
    #1 [0001000000 - 0001d4b2b0] TEXT DATA BSS ==> [0001000000 - 0001d4b2b0]
    #2 [0037d4d000 - 0037fef9e3] RAMDISK ==> [0037d4d000 - 0037fef9e3]
    #3 [0001d4c000 - 0001d4c350] BRK ==> [0001d4c000 - 0001d4c350]
    #4 [000009bc00 - 000009bd40] BIOS reserved ==> [000009bc00 - 000009bd40]
    #5 [000009bd40 - 000009bd50] MP-table mpf ==> [000009bd40 - 000009bd50]
    #6 [000009bd50 - 000009d920] BIOS reserved ==> [000009bd50 - 000009d920]
    #7 [000009dc84 - 0000100000] BIOS reserved ==> [000009dc84 - 0000100000]
    #8 [000009d920 - 000009dc84] MP-table mpc ==> [000009d920 - 000009dc84]
    #9 [0000001000 - 0000003000] TRAMPOLINE ==> [0000001000 - 0000003000]
    #10 [0000003000 - 0000007000] ACPI WAKEUP ==> [0000003000 - 0000007000]
    #11 [0000008000 - 000000b000] PGTABLE ==> [0000008000 - 000000b000]
    #12 [000000b000 - 0000028000] PGTABLE ==> [000000b000 - 0000028000]
    Zone PFN ranges:
    DMA 0x00000000 -> 0x00001000
    DMA32 0x00001000 -> 0x00100000
    Normal 0x00100000 -> 0x00840000
    Movable zone start PFN for each node
    early_node_map[3] active PFN ranges
    0: 0x00000000 -> 0x0000009b
    0: 0x00000100 -> 0x000bff4b
    0: 0x00100000 -> 0x00840000
    ACPI: PM-Timer IO Port: 0x588
    ACPI: LAPIC (acpi_id[0x00] lapic_id[0x0c] enabled)
    ACPI: LAPIC (acpi_id[0x01] lapic_id[0x10] enabled)
    ACPI: LAPIC (acpi_id[0x02] lapic_id[0x0d] enabled)
    ACPI: LAPIC (acpi_id[0x03] lapic_id[0x11] enabled)
    ACPI: LAPIC (acpi_id[0x04] lapic_id[0x0e] enabled)
    ACPI: LAPIC (acpi_id[0x05] lapic_id[0x12] enabled)
    ACPI: LAPIC (acpi_id[0x06] lapic_id[0x0f] enabled)
    ACPI: LAPIC (acpi_id[0x07] lapic_id[0x13] enabled)
    ACPI: LAPIC_NMI (acpi_id[0x00] dfl dfl lint[0x1])
    ACPI: LAPIC_NMI (acpi_id[0x01] dfl dfl lint[0x1])
    ACPI: LAPIC_NMI (acpi_id[0x02] dfl dfl lint[0x1])
    ACPI: LAPIC_NMI (acpi_id[0x03] dfl dfl lint[0x1])
    ACPI: LAPIC_NMI (acpi_id[0x04] dfl dfl lint[0x1])
    ACPI: LAPIC_NMI (acpi_id[0x05] dfl dfl lint[0x1])
    ACPI: LAPIC_NMI (acpi_id[0x06] dfl dfl lint[0x1])
    ACPI: LAPIC_NMI (acpi_id[0x07] dfl dfl lint[0x1])
    ACPI: IOAPIC (id[0x0f] address[0xfec00000] gsi_base[0])
    IOAPIC[0]: apic_id 15, version 32, address 0xfec00000, GSI 0-23
    ACPI: IOAPIC (id[0x10] address[0xfecff000] gsi_base[24])
    IOAPIC[1]: apic_id 16, version 17, address 0xfecff000, GSI 24-26
    ACPI: IOAPIC (id[0x0e] address[0xfec01000] gsi_base[27])
    IOAPIC[2]: apic_id 14, version 17, address 0xfec01000, GSI 27-62
    ACPI: IOAPIC (id[0x0d] address[0xfec02000] gsi_base[63])
    IOAPIC[3]: apic_id 13, version 17, address 0xfec02000, GSI 63-98
    ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
    ACPI: INT_SRC_OVR (bus 0 bus_irq 8 global_irq 8 high edge)
    ACPI: INT_SRC_OVR (bus 0 bus_irq 14 global_irq 14 high edge)
    ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
    Using ACPI (MADT) for SMP configuration information
    ACPI: HPET id: 0x10142201 base: 0xfde84000
    SMP: Allowing 8 CPUs, 0 hotplug CPUs
    mapped APIC to ffffffffff5fc000 (fee00000)
    mapped IOAPIC to ffffffffff5fb000 (fec00000)
    mapped IOAPIC to ffffffffff5fa000 (fecff000)
    mapped IOAPIC to ffffffffff5f9000 (fec01000)
    mapped IOAPIC to ffffffffff5f8000 (fec02000)
    Allocating PCI resources starting at e0000000 (gap: e0000000:1ec00000)
    setup_percpu: NR_CPUS:255 nr_cpumask_bits:255 nr_cpu_ids:8 nr_node_ids:1
    PERCPU: Embedded 27 pages/cpu @ffff880028200000 s80280 r8192 d22120 u262144
    pcpu-alloc: s80280 r8192 d22120 u262144 alloc=1*2097152
    pcpu-alloc: [0] 0 1 2 3 4 5 6 7
    Built 1 zonelists in Zone order, mobility grouping on. Total pages: 8269916
    Policy zone: Normal
    Kernel command line: ro root=LABEL=/ rhgb console=tty0 console=ttyS0,9600n1 apic=debug
    PID hash table entries: 4096 (order: 3, 32768 bytes)
    Checking aperture...
    No AGP bridge found
    Memory: 33010860k/34603008k available (3066k kernel code, 1049704k absent, 542444k reserved, 5027k data, 476k init)
    Hierarchical RCU implementation.
    NR_IRQS:4352
    Console: colour VGA+ 80x25
    console [tty0] enabled
    console [ttyS0] enabled
    Fast TSC calibration using PIT
    Detected 2931.853 MHz processor.
    Calibrating delay loop (skipped), value calculated using timer frequency.. 5863.70 BogoMIPS (lpj=2931853)
    Security Framework initialized
    SELinux: Initializing.
    Dentry cache hash table entries: 4194304 (order: 13, 33554432 bytes)
    Inode-cache hash table entries: 2097152 (order: 12, 16777216 bytes)
    Mount-cache hash table entries: 256
    CPU: Physical Processor ID: 3
    CPU: Processor Core ID: 0
    mce: CPU supports 6 MCE banks
    CPU0: Thermal monitoring enabled (TM1)
    using mwait in idle threads.
    Performance Events: Core2 events, Intel PMU driver.
    ... version: 2
    ... bit width: 40
    ... generic registers: 2
    ... value mask: 000000ffffffffff
    ... max period: 000000007fffffff
    ... fixed-purpose events: 3
    ... event mask: 0000000700000003
    ACPI: Core revision 20091214
    Setting APIC routing to flat
    Getting VERSION: 50014
    Getting VERSION: 50014
    Getting ID: c000000
    Getting ID: f3000000
    Getting LVT0: 700
    Getting LVT1: 400
    enabled ExtINT on CPU#0
    ESR value before enabling vector: 0x00000040 after: 0x00000000
    ENABLING IO-APIC IRQs
    ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
    CPU0: Intel(R) Xeon(R) CPU X7350 @ 2.93GHz stepping 0b
    Using local APIC timer interrupts.
    calibrating APIC timer ...
    ... lapic delta = 1665619
    ... PM-Timer delta = 357899
    ... PM-Timer result ok
    ..... delta 1665619
    ..... mult: 71548666
    ..... calibration result: 266499
    ..... CPU clock speed is 2931.0489 MHz.
    ..... host bus clock speed is 266.0499 MHz.
    Booting Node 0, Processors #1masked ExtINT on CPU#1
    #2masked ExtINT on CPU#2
    #3masked ExtINT on CPU#3
    #4masked ExtINT on CPU#4
    #5masked ExtINT on CPU#5
    #6masked ExtINT on CPU#6
    #7 Ok.
    masked ExtINT on CPU#7
    Brought up 8 CPUs
    Total of 8 processors activated (46905.61 BogoMIPS).

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