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    SubjectRe: 2.6.24 Kernel oops will running kernbench regression from 2.6.24-rc8-mm1
    Paul Mackerras wrote:
    > Kamalesh Babulal writes:
    >
    >>>>> NIP: 0000000000004570 LR: 000000000fc42dc0 CTR: 0000000000000000
    >>>>> REGS: c00000077b6bf8c0 TRAP: 0300 Not tainted (2.6.24-rc8-mm1-autotest)
    >>>>> MSR: 8000000000001000 <ME> CR: 28022422 XER: 00000000
    >>>>> DAR: c00000077b6bfce0, DSISR: 000000000a000000
    >
    > Actually, how much RAM does this machine have? If it has less than
    > 32GB, then the problem is that the kernel stack pointer is bogus.
    > (How it got to be bogus is the interesting question, of course. :)
    >
    > Paul.
    >
    Hi Paul,

    This kernel oops in seen in 2.6.24-rc8-git(2,3,4,5,7,8) and the 2.6.24.

    Oops: Kernel access of bad area, sig: 11 [#1]
    SMP NR_CPUS=32 NUMA pSeries
    Modules linked in:
    NIP: 0000000000004570 LR: 000000001030e594 CTR: 000000001012ddd0
    REGS: c000000771f9f8c0 TRAP: 0300 Not tainted (2.6.24-autotest)
    MSR: 8000000000001000 <ME> CR: 28000482 XER: 20000000
    DAR: c000000771f9fce0, DSISR: 000000000a000000
    TASK = c00000077b9c6000[19197] 'cc1' THREAD: c000000771f9c000 CPU: 2
    GPR00: 0000000000000064 c000000771f9fb40 00000000f7fdb470 0000000000000000
    GPR04: 0000000000000002 0000000000000000 0000000000782498 00000000003ff3ff
    GPR08: 00000000aaaaaaab 0000000040000484 c000000771f9fe30 0000998be2321500
    GPR12: 8000000000003030 c0000000005c5680 0000000010030000 0000000010030000
    GPR16: 00000000105b0000 00000000105b0000 0000000010440000 00000000105b0000
    GPR20: 00000000105b0000 00000000105f0000 0000000000000000 00000000ffd00b44
    GPR24: 00000000105b0000 00000000105b0000 00000000105b0000 00000000105b0000
    GPR28: 00000000105b0000 0000000010604684 0000000000000100 00000000105f75a8
    NIP [0000000000004570] 0x4570
    LR [000000001030e594] 0x1030e594
    Call Trace:
    [c000000771f9fb40] [c000000771f9fcf0] 0xc000000771f9fcf0 (unreliable)
    Instruction dump:
    48000000 XXXXXXXX XXXXXXXX XXXXXXXX 41820008 XXXXXXXX XXXXXXXX XXXXXXXX
    48000010 XXXXXXXX XXXXXXXX XXXXXXXX f92101a0 XXXXXXXX XXXXXXXX XXXXXXXX
    ---[ end trace a8c779b801674eed ]---
    -- 0:conmux-control -- time-stamp -- Jan/24/08 16:40:29 --
    -- 0:conmux-control -- time-stamp -- Jan/24/08 16:47:56 --
    Unable to handle kernel paging request for data at address 0xc00000077168f870
    Faulting instruction address: 0x00004570
    Oops: Kernel access of bad area, sig: 11 [#2]
    SMP NR_CPUS=32 NUMA pSeries
    Modules linked in:
    NIP: 0000000000004570 LR: c00000000004a310 CTR: 0000000000000000
    REGS: c00000077168f450 TRAP: 0300 Tainted: G D (2.6.24-autotest)
    MSR: 8000000000001000 <ME> CR: 28000242 XER: 00000000
    DAR: c00000077168f870, DSISR: 000000000a000000
    TASK = c000000771fdb170[24200] 'tbench' THREAD: c00000077168c000 CPU: 1
    GPR00: 0000000000000000 c00000077168f6d0 c00000000068bc30 8000000000009032
    GPR04: 8000000000001030 000000000000025a 0000000042000222 c00000000000ee64
    GPR08: c00000077168fae0 0000000028000242 c00000077168f9c0 0000998be2321500
    GPR12: 8000000000001030 c0000000005c5480 0000000000000000 0000000000000000
    GPR16: 00000000100a0000 00000000100a8b10 00000000100a0000 0000000010000000
    GPR20: 0000000000005e84 c000000000008cd4 c00000077168c000 c000000771fdb390
    GPR24: 0000000000000001 00000000ff9ce668 00000000ff9cec5c c000000771fdb170
    GPR28: 0000000000000001 c00000077ca7cba0 c000000000615938 0000000000000000
    NIP [0000000000004570] 0x4570
    LR [c00000000004a310] .finish_task_switch+0x54/0xe8
    Call Trace:
    [c00000077168f6d0] [c00000077168f790] 0xc00000077168f790 (unreliable)
    Instruction dump:
    48000000 XXXXXXXX XXXXXXXX XXXXXXXX 41820008 XXXXXXXX XXXXXXXX XXXXXXXX
    48000010 XXXXXXXX XXXXXXXX XXXXXXXX f92101a0 XXXXXXXX XXXXXXXX XXXXXXXX

    --
    Thanks & Regards,
    Kamalesh Babulal,
    Linux Technology Center,
    IBM, ISTL.


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