Date: Mon, 27 Aug 2001 12:43:27 -0700 (PDT) From: Matt Dillon <dillon@earth.backplane.com> To: Robert Watson <rwatson@FreeBSD.ORG> Cc: John Baldwin <jhb@FreeBSD.ORG>, Julian Elischer <julian@elischer.org>, current@FreeBSD.ORG Subject: Re: RE: Headsup! KSE Nay-sayers speak up! Message-ID: <200108271943.f7RJhRr24275@earth.backplane.com> References: <Pine.NEB.3.96L.1010827141515.42016P-100000@fledge.watson.org>
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Sheesh. Everyone is so negative! Well, I'm going to be too. I think compared to some of the other things that have been thrown into -current, the KSE stuff will be the LEAST disruptive. Don't go bashing Julian for coming up with a reasoned approach to adding them, discussing the concept at many meetings (including at USENIX), and doing all the hard work to get it done. He's done a hellof a lot more discussion and worked with people a lot more any other feature that has been thrown into -current. He doesn't deserve these kind of responses, not after all the work that's been done. He's been talking about this for 2 years. TWO years! - Just for myself, I am seriously considering just throwing the whole lot (-current, that is) away and starting over from -stable. I spent 20 hours last weekend trying to unwind even part of the VM system from Giant, and failed utterly. I'd love to see the KSE stuff in -stable, I think it might even be a better fit. I am seriously considering this because I think we made a huge mistake throwing away the spl*() mechanism in -current, as a means of getting out from under the Giant lock paradigm quickly and partitioning the problem in a manner that allows subsystems to be worked on independantly. And I don't see any way to get it back. The spl*() mechanism already partitions the major subsystems that *need* to operate concurrently: I/O, interrupts, and the network stack. We would be able to work on major subsystems independantly and we would be able to debug things much more easily. -current as it currently stands is very nearly undebuggable. I've been thinking about this for the last few months... I am still thinking about it. I haven't made a decision yet. I think if KSEs go into -current I would stick with it, but if KSEs do not go into -current I don't see much of a point, -current will have wholely gone off in a direction that I don't believe in (rather then just mostly gone off). -Matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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