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    SubjectRe: 2.6.25-rc5-mm1 shutdown crash
    On Thu, 13 Mar 2008 15:03:33 +0100 Helge Hafting <helge.hafting@aitel.hist.no> wrote:

    > This kernel hangs during shutdown, and that prevents automatic poweroff.
    > I have one small patch that improves the iwl3945 wireless driver a little.
    > Dell D830 laptop, 64-bit smp
    >
    >
    > It looks like this:
    > *** Last service has quit. ***
    > Your system will now POWER OFF!
    > Goodbye
    > Bug: unable to handle kernel paging request at ffffffff8020a7ad
    > IP: [<ffffffff80211b5a>] text_poke+0xe/0x15
    > PGD 203067 PUD 2+7+63 PMD 7f3ba163 PTE 20a161
    > Oops: 0003 [1] SMP
    > last sysfs file:
    > /sys/devices/LNXSYSTM:00/device:00/ACPI0003:00/power_supply/AC/online
    > CPU 0
    > Modules linked in: tun pcmcia dock piix iTCO_wdt ata_piix watchdog_core
    > watchdog_dev intel_agp ata_generic hci_usb
    >
    > Pid: 7606, comm: initng Not tainted 2.6.25-rc5-mm1
    >
    > RIP: 0010:[<ffffffff80211b5a>] [<ffffffff80211b5a>]text_poke+0xe/0x15
    > RSP: 0000:ffff81007e559cb8 EFLAGS: 00010083
    >
    > (register dump omitted, but I can reproduce anytime if it matters)
    > Process initng (pid 7606, threadinfo...)
    > call trace:
    > alternatives_smp_unlock
    > alternatives_smp_switch
    > ? schedule_timeout
    > __cpu_die
    > _cpu_down
    > disable_nonboot_cpus
    > kernel_power_off
    > sys_reboot
    > ? handle_mm_fault
    > ? __up_read
    > ? do_page_fault
    > ? __put_user
    > ? error_exit
    > system_call_after_swapgs

    Yes, I was hitting the text_poke() oops with 2.6.25-rc3-mm1 but not with
    2.6.25-rc5-mm1.

    This _might_ have been due to a snafu in git-x86: it had a [patch 2/2] from
    Mathieu but was missing the needed [patch 1/2]. But I don't know if this
    was the cause and I don't know whether 2.6.25-rc3-mm1's git-x86 had the
    same problem.



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