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    SubjectRe: [PATCH 2/2] Initial generic hypertransport interrupt support.
    Date
    Dave Olson <olson@pathscale.com> writes:

    > On Thu, 13 Jul 2006, Eric W. Biederman wrote:
    > | > There's really nothing special at all about the interrupt
    > | > setup, except in one very minor way. The value of the HT interrupt
    > | > destination address needs to be copied from HT config space, to
    > | > an internal chip register (which is, can, and should be, handled by
    > | > the driver init code).
    > |
    > | The kernel changes the value at runtime, based upon user input.
    > | I assume your mirror register needs to be updated after every change.
    >
    > Yes. If the interrupt address changes, then we need a callback.
    >
    > | Since the kernel changes the value at runtime, and since a different
    > | register needs to be written to, I can't quite use the generic code I
    > | have written as is.
    >
    > I imagine at least some other drivers would like to know when their interrupt
    > configuration changes, also, so an interface where a driver can register
    > a callback handler seems like the right generic answer, or more simply,
    > a way for a driver to say it doesn't want it's interrupt handler
    > migrated (which we would like anyway, for performance reasons).

    As I recall that is "killall irqbalanced"

    Eric
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