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    SubjectRe: Next April 28: boot failure on PowerPC with SLQB
    Nick Piggin wrote:
    > Does this help?
    > ---
    With the patch the machine boots past the failure point, but panics
    immediately with the following trace...

    Unable to handle kernel paging request for data at address 0x00000010
    Faulting instruction address: 0xc0000000007d03ec
    Oops: Kernel access of bad area, sig: 11 [#1]
    Modules linked in:
    NIP: c0000000007d03ec LR: c0000000007b0bbc CTR: 0000000000136f8c
    REGS: c000000000a23bd0 TRAP: 0300 Not tainted (2.6.30-rc3-next-20090429)
    MSR: 8000000000009032 <EE,ME,IR,DR> CR: 28000084 XER: 00000010
    DAR: 0000000000000010, DSISR: 0000000040000000
    TASK = c000000000955fc0[0] 'swapper' THREAD: c000000000a20000 CPU: 0
    GPR00: 0000000000000001 c000000000a23e50 c000000000a17650 000000000000001f
    GPR04: 0000000000000000 ffffffffffffffff 000000000077a4b9 800000000c9b2cc0
    GPR08: 0000000000000000 0000000000000010 0000000000000000 c00000000095b0f8
    GPR12: 0000000028000082 c000000000af2400 c0000000007f3200 c000000000705c32
    GPR16: 00000000014f3138 0000000000000000 c0000000007f3138 0000000002f1fc90
    GPR20: c0000000007f3150 c000000000725d11 00000000007bb8e4 0000000002f1fc90
    GPR24: 0000000002f1fc90 c0000000007f31f0 0000000000d00000 c000000000b73b10
    GPR28: c0000000007f0440 c00000000095db00 c00000000098d5f0 0000000003c90000
    NIP [c0000000007d03ec] .pidmap_init+0x28/0x88
    LR [c0000000007b0bbc] .start_kernel+0x458/0x51c
    Call Trace:
    [c000000000a23e50] [c000000000a23ee0] init_thread_union+0x3ee0/0x4000
    [c000000000a23ee0] [c0000000007b0bbc] .start_kernel+0x458/0x51c
    [c000000000a23f90] [c0000000000083d8] .start_here_common+0x1c/0x44
    Instruction dump:
    ebc1fff0 4e800020 fbc1fff0 ebc2b1a8 39200010 7c0802a6 fba1ffe8 f8010010
    38000001 ebbe8008 f821ff71 f93d0010 <7d6048a8> 7d6b0378 7d6049ad 40c2fff4
    ---[ end trace 31fd0ba7d8756001 ]---
    Kernel panic - not syncing: Attempted to kill the idle task!
    Call Trace:
    [c000000000a23820] [c000000000011700] .show_stack+0x6c/0x16c (unreliable)
    [c000000000a238d0] [c000000000561f1c] .panic+0x80/0x1a8
    [c000000000a23960] [c00000000008dfa4] .do_exit+0x98/0x73c
    [c000000000a23a40] [c0000000000293f4] .die+0x280/0x284
    [c000000000a23ae0] [c000000000032700] .bad_page_fault+0xb8/0xd4
    [c000000000a23b60] [c000000000005798] handle_page_fault+0x3c/0x5c
    --- Exception: 300 at .pidmap_init+0x28/0x88
    LR = .start_kernel+0x458/0x51c
    [c000000000a23e50] [c000000000a23ee0] init_thread_union+0x3ee0/0x4000
    [c000000000a23ee0] [c0000000007b0bbc] .start_kernel+0x458/0x51c
    [c000000000a23f90] [c0000000000083d8] .start_here_common+0x1c/0x44
    Rebooting in 180 seconds..

    The page size is 64K. Config DEBUG_PAGEALLOC is enabled. Let me know
    if i can provide any more information.



    Sachin Sant
    IBM Linux Technology Center
    India Systems and Technology Labs
    Bangalore, India

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