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    SubjectRe: [patch 05/11] syslets: core code
    On Wed, 14 Feb 2007, Linus Torvalds wrote:

    >
    >
    > On Tue, 13 Feb 2007, Ingo Molnar wrote:
    > >
    > > the core syslet / async system calls infrastructure code.
    >
    > Ok, having now looked at it more, I can say:
    >
    > - I hate it.
    >
    > I dislike it intensely, because it's so _close_ to being usable. But the
    > programming interface looks absolutely horrid for any "casual" use, and
    > while the loops etc look like fun, I think they are likely to be less than
    > useful in practice. Yeah, you can do the "setup and teardown" just once,
    > but it ends up being "once per user", and it ends up being a lot of stuff
    > to do for somebody who wants to just do some simple async stuff.
    >
    > And the whole "lock things down in memory" approach is bad. It's doing
    > expensive things like mlock(), making the overhead for _single_ system
    > calls much more expensive. Since I don't actually believe that the
    > non-single case is even all that interesting, I really don't like it.
    >
    > I think it's clever and potentially useful to allow user mode to see the
    > data structures (and even allow user mode to *modify* them) while the
    > async thing is running, but it really seems to be a case of excessive
    > cleverness.

    Ok, that makes the wierdo-count up to two :) I agree with you that the
    chained API can be improved at least.



    - Davide


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