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    SubjectRe: Linus 2.6.23-rc1: ACPI-related oops on x86_64
    From
    On (22/07/07 14:04), Linus Torvalds didst pronounce:
    >
    > Ok, right on time, two weeks afetr 2.6.22, there's a 2.6.23-rc1 out there.
    >

    This was seen on a machine on test.kernel.org;

    Unable to handle kernel NULL pointer dereference at 0000000000000000
    RIP:
    [<ffffffff8037379b>] acpi_processor_throttling_seq_show+0xa7/0xd6
    PGD 3bd9e067 PUD 3bc6a067 PMD 0
    Oops: 0000 [1] SMP
    CPU 3
    Modules linked in: video output button battery floppy ac lp parport_pc
    parport nvram amd_rng rng_core i2c_amd756 i2c_core
    Pid: 1522, comm: head Not tainted 2.6.23-rc1-autokern1 #1
    RIP: 0010:[<ffffffff8037379b>] [<ffffffff8037379b>]
    acpi_processor_throttling_seq_show+0xa7/0xd6
    RSP: 0018:ffff81003c4a5e48 EFLAGS: 00010246
    RAX: 0000000000000020 RBX: ffff810037ea1800 RCX: 0000000000000000
    RDX: 000000000000002a RSI: ffffffff80599c02 RDI: ffff810037c6a9c0
    RBP: ffff810037c6a9c0 R08: ffff81003c3e3051 R09: ffff810037c6a9c0
    R10: ffffffffffffffff R11: ffffffff80373e66 R12: 0000000000000000
    R13: 0000000000000000 R14: 0000000000000000 R15: 00007fffd59dcd40
    FS: 00002b7ad50e36f0(0000) GS:ffff81003ee56b40(0000) knlGS:0000000000000000
    CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
    CR2: 0000000000000000 CR3: 000000003bd9b000 CR4: 00000000000006e0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    Process head (pid: 1522, threadinfo ffff81003c4a4000, task ffff81003ee81040)
    Stack: ffff81003eed7180 ffff810037c6a9c0 0000000000000001 0000000000000001
    0000000000002000 ffffffff802a77b3 ffff81003c4a5f50 ffff81003e2f8ec0
    ffff810037c6a9f0 ffff81003de65000 0000000000000000 fffffffffffffffb
    Call Trace:
    [<ffffffff802a77b3>] seq_read+0x105/0x28e
    [<ffffffff802a76ae>] seq_read+0x0/0x28e
    [<ffffffff802c8501>] proc_reg_read+0x80/0x9a
    [<ffffffff8028eb3d>] vfs_read+0xcb/0x153
    [<ffffffff8028eed9>] sys_read+0x45/0x6e
    [<ffffffff8020bc6e>] system_call+0x7e/0x83
    FATAL: Error inserting acpi_cpufreq
    (/lib/modules/2.6.23-rc1-autokern1/kernel/arch/x86_64/kernel/cpufreq/acpi-cpufreq.ko):
    No such device

    Full oops is at http://test.kernel.org/abat/100837/debug/console.log
    Config file at http://test.kernel.org/abat/100837/build/dotconfig

    People are added to the CC that git shows were in this general area
    recently in case they have the quick answer.

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