Re: kobj multiple inheritance

From: Justin T. Gibbs (gibbs_at_scsiguy.com)
Date: 09/22/03

  • Next message: Doug Rabson: "Re: kobj multiple inheritance" 
    Date: Mon, 22 Sep 2003 13:50:06 -0600
To: Doug Rabson <dfr@nlsystems.com>, arch@freebsd.org

    > I believe that I have the kobj multiple inheritance changes about ready
    > for committing now. I have locked up the class handling in kobj and I've
    > re-done the method dispatch so that it is MP-safe without needing locks
    > (I would appreciate a close look at that part by another pair of eyes).

    I've only just glanced at these patches, but I don't see how the
    method cache is now MP safe. Aren't you still vulnerable to a cache
    collision from two different threads performing an operation on the
    same class?

    I still believe that the concept of inherited interfaces is better
    way to achieve multiple inheritance. The methods I may want to
    inherit need not be associated with what we currently call a device
    class. The nice thing about your approach is that it doesn't require
    a massive rototilling of the drivers, but I fear it doesn't go far
    enough toward providing flexible inheritence. 

    --
Justin
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  • Next message: Doug Rabson: "Re: kobj multiple inheritance"

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