From owner-freebsd-alpha Wed Nov 6 15:58:47 2002 Delivered-To: freebsd-alpha@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 062A337B401; Wed, 6 Nov 2002 15:58:46 -0800 (PST) Received: from duke.cs.duke.edu (duke.cs.duke.edu [152.3.140.1]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2008743E6E; Wed, 6 Nov 2002 15:58:45 -0800 (PST) (envelope-from gallatin@cs.duke.edu) Received: from grasshopper.cs.duke.edu (grasshopper.cs.duke.edu [152.3.145.30]) by duke.cs.duke.edu (8.9.3/8.9.3) with ESMTP id SAA14502; Wed, 6 Nov 2002 18:58:35 -0500 (EST) Received: (from gallatin@localhost) by grasshopper.cs.duke.edu (8.11.6/8.9.1) id gA6Nw4837961; Wed, 6 Nov 2002 18:58:04 -0500 (EST) (envelope-from gallatin@cs.duke.edu) From: Andrew Gallatin MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15817.44172.809351.382956@grasshopper.cs.duke.edu> Date: Wed, 6 Nov 2002 18:58:04 -0500 (EST) To: mjacob@feral.com Cc: Jeff Roberson , alpha@FreeBSD.ORG, alc@FreeBSD.ORG, John Baldwin Subject: Re: alpha: top of tree kernel blooie In-Reply-To: References: <20021106182932.J1374-100000@mail.chesapeake.net> X-Mailer: VM 6.75 under 21.1 (patch 12) "Channel Islands" XEmacs Lucid Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Matthew Jacob writes: > > > > Such as? > > > > Thanks! > > Jeff > > > > > > Some atomic changes he made. alpha/include/atomic.h rev 1.17 (try 1.16) alpha/alpha/atomic.s rev 1.6 (try 1.5) John thinks the expensive extra memory barriers in the atomic ops may have masked existing pmap problems. I've been running the patch for 2 months on a UP config and not seen any problems. I did once see a strange Heisenbug when using an SMP kernel on a UP machine, but, again, not sure if that's related to the atomic changes. Once I put in a ktr to trace the trap, the bug disappeared. Since you're using the K0SEG, I"m not sure how pmap comes into play. Drew To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message