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    SubjectRe: [origin tree boot hang] [PATCH] Revert "early_printk: Allow morethan one early console"

    * Jason Wessel <jason.wessel@windriver.com> wrote:

    > Ingo Molnar wrote:
    > >> early_printk: Allow more than one early console
    > >>
    > >
    > > this patch broke things pretty badly on x86, with pretty much any
    > > config, as long as the early console is used - which most of my
    > > test-systems do :-(
    > >
    >
    > Ingo,
    >
    > Can you send me the boot args and kernel config you are using? I'd
    > like to figure out which part was at fault and fix it up.

    will do. Will take some time though - trying to track down a new boot
    crash as well:

    acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
    initcall acpiphp_init+0x0/0x83 returned -19 after 16410 usecs
    calling ibm_acpiphp_init+0x0/0x190 @ 1
    BUG: unable to handle kernel NULL pointer dereference at 0000000000000003
    IP: [<ffffffff82b07130>] ibm_find_acpi_device+0x5c/0xf5
    PGD 0
    Oops: 0002 [#1] SMP DEBUG_PAGEALLOC
    last sysfs file:
    CPU 0
    Pid: 1, comm: swapper Not tainted 2.6.31-tip #16786 System Product Name
    RIP: 0010:[<ffffffff82b07130>] [<ffffffff82b07130>] ibm_find_acpi_device+0x5c/0xf5
    RSP: 0018:ffff88003f2d1d60 EFLAGS: 00010246
    RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
    RDX: ffff88003f2d1d68 RSI: 00000000000001e4 RDI: 0000000000000000
    RBP: ffff88003f2d1d90 R08: 0000000000000001 R09: ffffffff824b645b
    R10: 000000002d0ef63b R11: ffff88003f2d1a80 R12: ffff88003fa780d0
    R13: ffffffff83940dc8 R14: 0000000000000001 R15: ffffffff83942e10
    FS: 0000000000000000(0000) GS:ffff880005800000(0000) knlGS:0000000000000000
    CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
    CR2: 0000000000000003 CR3: 0000000001001000 CR4: 00000000000006b0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    Process swapper (pid: 1, threadinfo ffff88003f2d0000, task ffff88003f2c8000)
    Stack:
    ffff88003f2c8000 ffff88003cfbb690 000000002d0ef63b 0000000000000000
    <0> 0000000000000000 ffff88003fa780d0 ffff88003f2d1e10 ffffffff8156b6b6
    <0> 0000000000000001 0000000100000000 0000000000000000 ffffffff83940dc8
    Call Trace:
    [<ffffffff8156b6b6>] acpi_ns_walk_namespace+0x11d/0x234
    [<ffffffff82b070d4>] ? ibm_find_acpi_device+0x0/0xf5
    [<ffffffff8157b159>] ? acpi_ut_acquire_mutex+0xd9/0x12e
    [<ffffffff82b070d4>] ? ibm_find_acpi_device+0x0/0xf5
    [<ffffffff81566dfa>] acpi_walk_namespace+0x105/0x162
    [<ffffffff81d067bf>] ? acpi_pm_read+0xd/0x3e
    [<ffffffff82b06f44>] ? ibm_acpiphp_init+0x0/0x190
    [<ffffffff82b06fa8>] ibm_acpiphp_init+0x64/0x190
    [<ffffffff810090b4>] do_one_initcall+0x82/0x1a6
    [<ffffffff810edecc>] ? init_irq_proc+0x77/0x9a
    [<ffffffff82ad8975>] do_basic_setup+0x5e/0x87
    [<ffffffff82ad8a26>] kernel_init+0x88/0xe2
    [<ffffffff8103ddfa>] child_rip+0xa/0x20
    [<ffffffff8103d7bc>] ? restore_args+0x0/0x30
    [<ffffffff82ad899e>] ? kernel_init+0x0/0xe2
    [<ffffffff8103ddf0>] ? child_rip+0x0/0x20
    Code: 48 c7 c2 c0 7b 0b 82 48 c7 c6 95 39 4a 82 48 c7 c7 1a 3c 4a 82 31 c0 e8 02 84 4b ff 31 c0 e9 82 00 00 00 48 8b 45 d8 48 8b 40 30 <c6> 40 03 00 48 8b 45 d8 83 78 18 00 74 5f f6 40 0d 04 74 59 48
    RIP [<ffffffff82b07130>] ibm_find_acpi_device+0x5c/0xf5
    RSP <ffff88003f2d1d60>
    CR2: 0000000000000003
    ---[ end trace 5a5d197966b56a2e ]---
    Kernel panic - not syncing: Fatal exception
    Pid: 1, comm: swapper Tainted: G D 2.6.31-tip #16786

    /me looks in the general direction of Len ;-)

    Ingo


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