From owner-freebsd-current Mon Mar 27 11: 4:56 2000 Delivered-To: freebsd-current@freebsd.org Received: from ns.yogotech.com (ns.yogotech.com [206.127.79.126]) by hub.freebsd.org (Postfix) with ESMTP id CA0A137C0A9 for ; Mon, 27 Mar 2000 11:04:41 -0800 (PST) (envelope-from nate@yogotech.com) Received: from nomad.yogotech.com (nomad.yogotech.com [206.127.79.115]) by ns.yogotech.com (8.9.3/8.9.3) with ESMTP id MAA06754; Mon, 27 Mar 2000 12:04:24 -0700 (MST) (envelope-from nate@nomad.yogotech.com) Received: (from nate@localhost) by nomad.yogotech.com (8.8.8/8.8.8) id MAA27402; Mon, 27 Mar 2000 12:04:15 -0700 (MST) (envelope-from nate) Date: Mon, 27 Mar 2000 12:04:15 -0700 (MST) Message-Id: <200003271904.MAA27402@nomad.yogotech.com> From: Nate Williams MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit To: Matthew Dillon Cc: Daniel Eischen , Nate Williams , nms@otdel-1.org, freebsd-current@FreeBSD.ORG Subject: Re: Is there spinlocks/semaphores available for drivers? In-Reply-To: <200003271901.LAA42391@apollo.backplane.com> References: <200003271901.LAA42391@apollo.backplane.com> X-Mailer: VM 6.34 under 19.16 "Lille" XEmacs Lucid Reply-To: nate@yogotech.com (Nate Williams) Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > :And would there still be areas of the kernel that disable multiple > :interrupts, perhaps CAM or the network stack for instance? What do > :all the splbio and splnet calls translate into in this new scheme? > : > > The entire design of the kernel is currently predicated on the spl*() > mechanism. We obviously can't rip it out in a day. I'm guessing it > will probably take two years ... or never if we can eek out sufficient > performance with it still in place. It is my (probably naive) understanding that BSDi has done a bunch of work in this area, and that we should be able to leverage alot of their work. Having never seen it, I (bogusly?) assume they aren't using spl*() anymore, given that they now have kernel threads. Does anyone know more? Nate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message