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    SubjectRe: 2.6.21-rc7-mm2 -- x86_64 blade hard hangs
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    On (26/04/07 14:33), Mel Gorman didst pronounce:
    > On (26/04/07 15:51), Andi Kleen didst pronounce:
    > > Andy Whitcroft <apw@shadowen.org> writes:
    > >
    > > > Getting hard boot failures before any kernel output on an x86_64 blade:
    > > >
    > > > root (hd0,0)
    > > > Filesystem type is ext2fs, partition type 0x83
    > > > kernel /vmlinuz-autobench ro root=/dev/VolGroup00/LogVol00 rhgb
    > > > console=tty0 console=ttyS1,19200 selinux=no autobench_args:
    > > > root=30726124 ABAT:1177507960 profile=2
    > > > [Linux-bzImage, setup=0x1e00, size=0x21fe48]
    > > > initrd /initrd-autobench.img
    > > > [Linux-initrd @ 0x37e5f000, 0x190984 bytes]
    > > > [silence]
    > > >
    > > > Kernel config is here:
    > > >
    > > > http://test.kernel.org/abat/85082/build/dotconfig
    > >
    > > You should boot with earlyprintk=serial,ttyS1,19200
    > >
    >
    > Here is the console log. Haven't taken a closer look yet in case it's
    > blindingly obvious to you.
    >
    > kernel /vmlinuz-autobench ro root=/dev/VolGroup00/LogVol00 rhgb
    > console=tty0 co
    > nsole=ttyS1,19200 selinux=no autobench_args: root=30726124
    > ABAT:1177594149 logl
    > evel=8 earlyprintk=serial,ttyS1,19200
    > [Linux-bzImage, setup=0x1e00, size=0x220da8]
    > initrd /initrd-autobench.img
    > [Linux-initrd @ 0x37e5f000, 0x190982 bytes]
    > Linux version 2.6.21-rc7-mm2-autokern1 (root@bl6-13.ltc.austin.ibm.com)
    > (gcc version 4.1.1 20060525 (Red Hat 4.1.1-1)) #1 SMP Thu Apr 26
    > 08:16:37 CDT 2007
    > Command line: ro root=/dev/VolGroup00/LogVol00 rhgb console=tty0
    > console=ttyS1,19200 selinux=no autobench_args: root=30726124
    > ABAT:1177594149 loglevel=8 earlyprintk=serial,ttyS1,19200
    > BIOS-provided physical RAM map:
    > BIOS-e820: 0000000000000000 - 000000000009d400 (usable)
    > BIOS-e820: 000000000009d400 - 00000000000a0000 (reserved)
    > BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
    > BIOS-e820: 0000000000100000 - 000000003ffcddc0 (usable)
    > BIOS-e820: 000000003ffcddc0 - 000000003ffd0000 (ACPI data)
    > BIOS-e820: 000000003ffd0000 - 0000000040000000 (reserved)
    > BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved)
    > end_pfn_map = 1048576
    > kernel direct mapping tables up to 100000000 @ 8000-d000
    > DMI 2.3 present.
    > ACPI: RSDP 000FDFC0, 0014 (r0 IBM )
    > ACPI: RSDT 3FFCFF80, 0034 (r1 IBM SERBLADE 1000 IBM 45444F43)
    > ACPI: FACP 3FFCFEC0, 0084 (r2 IBM SERBLADE 1000 IBM 45444F43)
    > ACPI: DSDT 3FFCDDC0, 1EA6 (r1 IBM SERBLADE 1000 INTL 2002025)
    > ACPI: FACS 3FFCFCC0, 0040
    > ACPI: APIC 3FFCFE00, 009C (r1 IBM SERBLADE 1000 IBM 45444F43)
    > ACPI: SRAT 3FFCFD40, 0098 (r1 IBM SERBLADE 1000 IBM 45444F43)
    > ACPI: HPET 3FFCFD00, 0038 (r1 IBM SERBLADE 1000 IBM 45444F43)
    > SRAT: PXM 0 -> APIC 0 -> Node 0
    > SRAT: PXM 0 -> APIC 1 -> Node 0
    > SRAT: PXM 1 -> APIC 2 -> Node 1
    > SRAT: PXM 1 -> APIC 3 -> Node 1
    > SRAT: Node 0 PXM 0 0-40000000
    > PANIC: early exception rip ffffffff808a7e83 error 0 cr2 5cf0
    > Call Trace:
    > [<ffffffff808a7e83>] reserve_bootmem_node+0x0/0xc
    > [<ffffffff808a3a8c>] reserve_bootmem_generic+0x6d/0x99
    > [<ffffffff8089cc00>] setup_arch+0x2f7/0x469
    > [<ffffffff80896510>] start_kernel+0x64/0x2aa
    > [<ffffffff80896148>] _sinittext+0x148/0x14c
    > RIP reserve_bootmem_node+0x0/0xc
    >

    When I looked closer, nothing seemed to make sense so here is another
    log with stack unwinder, frame pointer etc etc

    PANIC: early exception rip ffffffff8095a873 error 0 cr2 5cf0

    Call Trace:
    [<ffffffff8020b174>] dump_trace+0xb6/0x3d8
    [<ffffffff8020b4d2>] show_trace+0x3c/0x52
    [<ffffffff8020b4fd>] dump_stack+0x15/0x17
    [<ffffffff802001e7>]
    DWARF2 unwinder stuck at 0xffffffff802001e7
    Leftover inexact backtrace:
    [<ffffffff8095a873>] reserve_bootmem_node+0x1/0x12
    [<ffffffff8096114f>] acpi_table_parse+0x4f/0x69
    [<ffffffff80955f91>] reserve_bootmem_generic+0x73/0x9e
    [<ffffffff8094edd3>] setup_arch+0x301/0x49c
    [<ffffffff8094855f>] start_kernel+0x6c/0x30b
    [<ffffffff80948144>] _sinittext+0x144/0x14b

    RIP reserve_bootmem_node+0x1/0x12

    Will keep kicking.

    --
    Mel Gorman
    Part-time Phd Student Linux Technology Center
    University of Limerick IBM Dublin Software Lab
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