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    Subject2.6.{30,31} x86_64 ahci problem - irq 23: nobody cared
    the problem appears under heavy system load and slows down the system to
    unusable speed.
    kernels before .30 were not affected.
    irqpoll does not change behavior.

    error message from .31:

    [157152.418524] irq 23: nobody cared (try booting with the "irqpoll"
    option)
    [157152.418530] Pid: 1359, comm: cc1plus Tainted: G W
    2.6.31-gentoo-blackbit #2
    [157152.418532] Call Trace:
    [157152.418534] <IRQ> [<ffffffff81066e3f>] ?
    __report_bad_irq+0x30/0x7d
    [157152.418544] [<ffffffff81066f93>] ? note_interrupt+0x107/0x170
    [157152.418547] [<ffffffff81067580>] ? handle_fasteoi_irq+0x8a/0xaa
    [157152.418551] [<ffffffff8100d1cf>] ? handle_irq+0x17/0x1d
    [157152.418554] [<ffffffff8100c84b>] ? do_IRQ+0x54/0xb2
    [157152.418558] [<ffffffff8100b6d3>] ? ret_from_intr+0x0/0xa
    [157152.418559] <EOI>
    [157152.418560] handlers:
    [157152.418562] [<ffffffff813d2a6f>] (ahci_interrupt+0x0/0x426)
    [157152.418566] Disabling IRQ #23


    bios of the machine is up to date,
    i tried all related bios settings, no change.

    kernel config for .31 http://xx.vu/~ahuemer/config_ahuemer_20090923.gz
    lspci -vxxx http://xx.vu/~ahuemer/lspci_ahuemer_20090923
    lsusb -v http://xx.vu/~ahuemer/lsusb_ahuemer_20090923
    /proc/interrupts
    http://xx.vu/~ahuemer/proc_interrupts_ahuemer_20090923
    thread in gentoo forums
    http://forums.gentoo.org/viewtopic-t-780725-start-0.html

    please tell me what additional info is needed.
    please CC me on replies, i am not subscribed.

    -alex


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