Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266793AbUJFE55 (ORCPT ); Wed, 6 Oct 2004 00:57:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267189AbUJFE55 (ORCPT ); Wed, 6 Oct 2004 00:57:57 -0400 Received: from fw.osdl.org ([65.172.181.6]:51419 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S266793AbUJFE54 (ORCPT ); Wed, 6 Oct 2004 00:57:56 -0400 Date: Tue, 5 Oct 2004 21:46:05 -0700 From: Andrew Morton To: Jeff Garzik Cc: andrea@novell.com, nickpiggin@yahoo.com.au, rml@novell.com, roland@topspin.com, linux-kernel@vger.kernel.org Subject: Re: Preempt? (was Re: Cannot enable DMA on SATA drive (SCSI-libsata, VIA SATA)) Message-Id: <20041005214605.5ec397ab.akpm@osdl.org> In-Reply-To: <41636FCF.3060600@pobox.com> References: <52is9or78f.fsf_-_@topspin.com> <4163465F.6070309@pobox.com> <41634A34.20500@yahoo.com.au> <41634CF3.5040807@pobox.com> <1097027575.5062.100.camel@localhost> <20041006015515.GA28536@havoc.gtf.org> <41635248.5090903@yahoo.com.au> <20041006020734.GA29383@havoc.gtf.org> <20041006031726.GK26820@dualathlon.random> <4163660A.4010804@pobox.com> <20041006040323.GL26820@dualathlon.random> <41636FCF.3060600@pobox.com> X-Mailer: Sylpheed version 0.9.7 (GTK+ 1.2.10; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 619 Lines: 15 Jeff Garzik wrote: > > Preempt will always be something I ask people to turn off when reporting > driver bugs; it just adds too much complicated mess for zero gain. What driver bugs are apparent with preemption which are not already SMP bugs? Only thing I can think of is unguarded use of per-cpu data, and we have runtime debug checks for that now. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/