From owner-freebsd-smp Thu Sep 5 14:41:46 1996 Return-Path: owner-smp Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id OAA22121 for smp-outgoing; Thu, 5 Sep 1996 14:41:46 -0700 (PDT) Received: from phaeton.artisoft.com (phaeton.Artisoft.COM [198.17.250.211]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id OAA22114 for ; Thu, 5 Sep 1996 14:41:39 -0700 (PDT) Received: (from terry@localhost) by phaeton.artisoft.com (8.6.11/8.6.9) id OAA09991; Thu, 5 Sep 1996 14:38:34 -0700 From: Terry Lambert Message-Id: <199609052138.OAA09991@phaeton.artisoft.com> Subject: Re: SMP on Intel XXpress To: smp@csn.net (Steve Passe) Date: Thu, 5 Sep 1996 14:38:34 -0700 (MST) Cc: terry@lambert.org, rv@groa.uct.ac.za, smp@freebsd.org In-Reply-To: <199609052009.OAA27675@clem.systemsix.com> from "Steve Passe" at Sep 5, 96 02:09:03 pm X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-smp@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > b4 the "sysctl kern.smp_active=2" the 2nd CPU is running a busy loop > in mp_begin, polling smp_active. at this point in time it has the EI > bit OFF, ie 'cli', but all the other setup has been done, ie it is in > protected mode, paging, etc. > > after the "sysctl kern.smp_active=2" the 2nd CPU calls secondary_main() > which merely prints an info message, then calls cpu_switch(), from which > it never returns (thats a good thing, it shouldn't). but from this point > on we have the INT loss problem. > > I'm totally confused... Ugh. Below that is the scheduler, and I have been hiding from the scheduler. I'm afraid I'm not going to be much help here. Poul is the guy for where you are at... Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.