From owner-freebsd-arch@FreeBSD.ORG Wed Apr 15 20:37:52 2009 Return-Path: Delivered-To: arch@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C48D01065672; Wed, 15 Apr 2009 20:37:52 +0000 (UTC) (envelope-from xcllnt@mac.com) Received: from asmtpout012.mac.com (asmtpout012.mac.com [17.148.16.87]) by mx1.freebsd.org (Postfix) with ESMTP id B056C8FC17; Wed, 15 Apr 2009 20:37:52 +0000 (UTC) (envelope-from xcllnt@mac.com) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Received: from macbook-pro.jnpr.net ([66.129.224.36]) by asmtp012.mac.com (Sun Java(tm) System Messaging Server 6.3-8.01 (built Dec 16 2008; 32bit)) with ESMTPSA id <0KI50065STB3AT00@asmtp012.mac.com>; Wed, 15 Apr 2009 13:37:52 -0700 (PDT) Message-id: From: Marcel Moolenaar To: John Baldwin In-reply-to: <200904151613.50568.jhb@freebsd.org> Date: Wed, 15 Apr 2009 13:36:30 -0700 References: <200904151324.06754.jhb@freebsd.org> <16C23095-4023-499D-896C-8A7A478FDCE4@mac.com> <200904151613.50568.jhb@freebsd.org> X-Mailer: Apple Mail (2.930.3) Cc: arch@freebsd.org Subject: Re: Enabling interrupt filters by default X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Apr 2009 20:37:53 -0000 On Apr 15, 2009, at 1:13 PM, John Baldwin wrote: > On Wednesday 15 April 2009 2:04:14 pm Marcel Moolenaar wrote: >> >> On Apr 15, 2009, at 10:24 AM, John Baldwin wrote: >> >>> A while ago I changed the interrupt code in 8.x such that all the MD >>> code was >>> the same for both the INTR_FILTER and non-INTR_FILTER case. I would >>> like to >>> flip the switch to enable INTR_FILTER by default. Any objections? >> >> Last time it was found to be not working. Did we fix it? > > Err, when was that? August 2007. > I know folks have used it on amd64 and i386 ok and I have > tested it on both of those platforms. One of the arm kernel configs > uses it > by default. There was interrupt starvation on sparc64. There were also issues with permanently masking stray interrupts. This is problematic when interrupts are shared and there is at least 1 filter on it. FYI, -- Marcel Moolenaar xcllnt@mac.com