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    SubjectRe: [PATCH] x86: Don't allow nr_irqs > NR_IRQS
    On Tue, Nov 4, 2008 at 10:36 AM, Ben Hutchings
    <bhutchings@solarflare.com> wrote:
    > On Tue, 2008-11-04 at 21:00 +0300, Cyrill Gorcunov wrote:
    > [...]
    >> | I hit this when running net-next-2.6 (close to 2.6.28-rc3) on a
    >> | Supermicro dual Xeon system. NR_IRQS is 224 but probe_nr_irqs() detects
    >> | 5 IOAPICs (!) and returns 240. Here are the log messages:
    >> |
    >
    > Well there must have been an earlier change that resulted in detecting 5
    > IOAPICs instead of just 1, but that presumably would work as long as the
    > irq_desc array was dynamically allocated. This reversion breaks that.
    >
    > You don't really need to see the config; NR_IRQS is *always* 224 on
    > normal x86-32 systems.
    >

    Yes. it should the same as setting to 64bit. we will cost some extra ram...

    We can not make sparseirq/dyn_array to 2.6.28..., maybe 2.6.29 later.

    Ingo,
    Maybe we can put back dyn_array at first, that will still be 1:1
    mapping..., and not waste memory..

    YH


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