Re: Network Stack Locking

From: Robert Watson (rwatson_at_freebsd.org)
Date: 05/26/04

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    Date: Wed, 26 May 2004 17:28:49 -0400 (EDT)
To: Julian Elischer <julian@elischer.org>

    On Tue, 25 May 2004, Julian Elischer wrote:

    > This is how netgraph works. (particularly in 5.x)

    It's also worth pointing out, for those looking at various approaches,
    that NetBSD is currently discussing continuation primitives on the
    tech-kern mailing list (I seem to have gotten added to the CC line lately,
    which I don't object to :-).

    You can also argue that things like bio's, PCB's, et al, are
    implementations of the continuation philosophy, just lacking a abstracted
    primitive. They maintain state to be picked up by a context but
    discarding the stack. Callouts and callbacks are used to perform
    scheduling, however, rather than the scheduler explicitly.

    Robert N M Watson FreeBSD Core Team, TrustedBSD Projects
    robert@fledge.watson.org Senior Research Scientist, McAfee Research

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