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    SubjectRe: mm snapshot broken-out-2007-11-20-01-45.tar.gz -- powerpc panic
    On Tue, 20 Nov 2007 14:46:59 +0000
    Andy Whitcroft <apw@shadowen.org> wrote:

    > I have one powerpc machine which managed to compile this snapshot! It
    > paniced on boot as below, might be nfs so copied them. General results
    > are popping out on TKO.
    >
    > -apw
    >
    > Freeing initrd memory: 1224k freed
    > Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
    > Unable to handle kernel paging request for data at address 0x00000050
    > Faulting instruction address: 0xc000000000113b64
    > Oops: Kernel access of bad area, sig: 11 [#1]
    > SMP NR_CPUS=32 NUMA pSeries
    > Modules linked in:
    > NIP: c000000000113b64 LR: c000000000113b44 CTR: 0000000000000000
    > REGS: C00000077E0679D0 TRAP: 0300 Not tainted (2.6.24-rc3-mm1-autokern1)
    > MSR: 8000000000009032 <EE,ME,IR,DR> CR: 24004044 XER: 20000000
    > DAR: 0000000000000050, DSISR: 0000000040000000
    > TASK = C00000077E062000[1] 'swapper' THREAD: C00000077E064000 CPU: 0
    > GPR00: 0000000000000000 c00000077e067c50 c0000000006c5650 0000000000000001
    > GPR04: c00000077e625bdc 0000000000000005 c000000000501ad4 c000000000731d18
    > GPR08: 0000000000000000 0000000000000000 c00000077e625b40 0000000000000001
    > GPR12: 0000000024004044 c0000000005fd000 0000000000000000 0000000000000000
    > GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
    > GPR20: 4000000003a00000 0000000004300000 0000000003fb94a8 0000000000132000
    > GPR24: 0000000003fb9718 0000000000000000 c0000000005b6e70 0000000000000000
    > GPR28: 0000000000000005 c00000077e625b40 c000000000652e48 c00000077e625c50
    > NIP [c000000000113b64] .remove_proc_entry+0xac/0x234
    > LR [c000000000113b44] .remove_proc_entry+0x8c/0x234
    > Call Trace:
    > [c00000077e067c50] [c000000000113b44] .remove_proc_entry+0x8c/0x234 (unreliable)
    > [c00000077e067d10] [c00000000048bf28] .cache_unregister+0x108/0x1b4
    > [c00000077e067d90] [c0000000001ca988] .nfsd_export_shutdown+0x50/0xa4
    > [c00000077e067e10] [c0000000005a712c] .init_nfsd+0x108/0x13c
    > [c00000077e067ea0] [c000000000582438] .kernel_init+0x224/0x3fc
    > [c00000077e067f90] [c000000000026204] .kernel_thread+0x4c/0x68
    > Instruction dump:
    > e8bf0000 e8810090 7f83e378 4bfffd25 2f830000 419e0018 ebbf0000 e81d0050
    > f81f0000 38000000 f81d0050 e93f0000 <e8090050> 3be90050 2fa00000 409effc4
    > Kernel panic - not syncing: Attempted to kill init!

    Various people have been mucking with procfs core:

    proc-remove-module_license.patch
    proc-less-lock-operations-during-lookup.patch
    proc-simplify-function-prototypes.patch
    proc-remove-useless-check-on-symlink-removal.patch
    proc-remove-useless-checks-in-proc_register.patch
    proc-detect-duplicate-names-on-registration.patch
    proc-detect-duplicate-names-on-registration-fix.patch
    proc-simplify-remove_proc_entry-wrt-locking.patch
    proc-simplify-remove_proc_entry-wrt-locking-checkpatch-fixes.patch
    proc-implement-proc_single_file_operations.patch
    proc-rewrite-do_task_stat-to-correctly-handle-pid-namespaces.patch
    proc-seqfile-convert-proc_pid_statm.patch
    proc-proper-pidns-handling-for-proc-self.patch

    And I had to skip a couple of patches due to conflicts.

    I'll see if it happens on any of my test machines.
    -
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