Re: Read Copy Update

From: Peter A Jonsson (pj_at_ludd.ltu.se)
Date: 02/19/04

  • Next message: Doug Rabson: "Re: Read Copy Update" 
    To: Doug Rabson <dfr@nlsystems.com>
Date: 19 Feb 2004 17:26:23 +0100

    > I imagine that a FreeBSD implementation of RCU wouldn't actually be too
    > hard and it might be well worth it as an alternative way of managing
    > concurrency, e.g. for the routing cache and the name cache (and probably
    > lots of other things).

    Alan Cox pointed out[1] that there was a patent problem (US Patent
    #05442758 [2]) with RCU which prevented inclusion in the Linux
    kernel. This was solved[3] by granting the right to use it in GPL
    software according to my understanding. Isn't this a problem for
    FreeBSD?

    [1] http://www.cs.helsinki.fi/linux/linux-kernel/2001-36/0385.html
    [2]
    http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/srchnum.htm&r=1&f=G&l=50&s1=5442758.WKU.&OS=PN/5442758&RS=PN/5442758
    [3] http://www.cs.helsinki.fi/linux/linux-kernel/2001-36/0505.html

    / Peter

    _______________________________________________
    freebsd-arch@freebsd.org mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-arch
    To unsubscribe, send any mail to "freebsd-arch-unsubscribe@freebsd.org"

  • Next message: Doug Rabson: "Re: Read Copy Update"