Bill Huey (hui) <[EMAIL PROTECTED]> wrote: > > There are patent issues and the GPL license, but this is just too powerful an > algorithm to ignore. In many way, this brings out the ultimate in what shared > memory system can do.
Without entering such troll subjects, the patent issue completely kills using RCU outside of Linux. RCU is patented IBM with special licence to use in Linux only, as far as i remember. Due to the history of IBM it would be suicidal for another project to even try using it. This leaves other open source systems in the position to use only more traditional techniques, such as fine grained locking. And Solaris has very good SMP performance without using RCU. Perhaps clever people can design a RCU-like system which doesn't fall under the RCU patent, who knows? Indeed this per CPU replication of kernel data structures is not completely foreign to the RCU idea of replicating shared data without being the same. -- Michel Talon
