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    Subject[PATCH 0/3] x86_64 irq fixes
    Date
    Muli Ben-Yehuda <muli@il.ibm.com> writes:

    > On Sat, Oct 07, 2006 at 10:52:24AM -0600, Eric W. Biederman wrote:
    >
    >> Can you try CONFIG_CPU_HOTPLUG? That will force genapic to be set
    >> to genapic_physflat instead of genapic_flat.
    >
    > Yep, it boots with CONFIG_CPU_HOTPLUG!
    >
    >> If genapic_physflat works we will have to decide what to do about
    >> genapic_flat.
    >
    > I'm happy to test any follow-on patches to make it work without
    > CONFIG_CPU_HOTPLUG.

    Ok. I have found a fairly clean way to structure the code that
    should restore the previous behavior of the genapic_flat allowing
    lowest priority interrupt delivery to work, and getting lucky
    and avoiding your hardware that does not do what the software
    tells it to :)

    I still need to dig in and remove the BUG_ON in the interrupt
    reception path, but that is a separate problem.

    I also found another small bug in the pci_enable_irq because
    of some code I failed to remove earlier, and the patches overlap
    so I have made this a small patch series.

    I have tested the code as best I can, and confirmation that this
    fixes the original problem would be great. But I don't see how
    it could fail to fix the problem, as it restores genapic_flat to
    global vector allocation.

    Eric
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