splxxx level?

From: Sam (sah_at_softcardsystems.com)
Date: 08/30/04

  • Next message: Scott Long: "Re: splxxx level?" 
    Date: Mon, 30 Aug 2004 10:48:11 -0500 (EST)
To: freebsd-arch@freebsd.org

    Hello -

    I'm almost to testing on my AoE driver for 4.x and have
    a question about interrupt priority levels.

    There are currently three entry points into the driver:

    a) strategy routine
    b) network frame reception routine
    c) timer rexmit routine

    Any of the three can diddle with the device structure
    and thusly I need to ensure they're not running simultaneously.
    For example, the network reception can cause a buf to be completed
    and the rexmit timer can cause a buf to be failed.

    So, what kind of contexts are the callout, strategy, and
    network soft interrupt called in? Which splxxx will give
    one of them exclusive access to whatever they need?

    Just as a reality check -- I am thinking about this correct, right?

    Cheers,

    Sam

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  • Next message: Scott Long: "Re: splxxx level?"