Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261233AbTENIHj (ORCPT ); Wed, 14 May 2003 04:07:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261249AbTENIHj (ORCPT ); Wed, 14 May 2003 04:07:39 -0400 Received: from holomorphy.com ([66.224.33.161]:40129 "EHLO holomorphy") by vger.kernel.org with ESMTP id S261233AbTENIHf (ORCPT ); Wed, 14 May 2003 04:07:35 -0400 Date: Wed, 14 May 2003 01:20:15 -0700 From: William Lee Irwin III To: Jens Axboe Cc: "Justin T. Gibbs" , linux-kernel@vger.kernel.org, axel@pearbough.net Subject: Re: drivers/scsi/aic7xxx/aic7xxx_osm.c: warning is error Message-ID: <20030514082015.GI2444@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Jens Axboe , "Justin T. Gibbs" , linux-kernel@vger.kernel.org, axel@pearbough.net References: <20030514004009.GA20914@neon.pearbough.net> <20030514031826.GB29926@holomorphy.com> <493702704.1052892304@aslan.scsiguy.com> <20030514073700.GA3151@beaverton.ibm.com> <20030514075407.GA10685@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030514075407.GA10685@suse.de> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1202 Lines: 28 On Wed, May 14 2003, Mike Anderson wrote: [...] >> bounce_pfn: 0xfffff [...] That might explain the performance problem reported to me not long after I posted the thing. On Wed, May 14, 2003 at 09:54:07AM +0200, Jens Axboe wrote: > So to recap, aic7xxx will never see a request that exceeds one of the > above values. Total request size will always be equal to or below 4MiB, > less than or equal to 128 segments, and will never cross a 4GB memory > boundary. Memory above pfn 0xfffff (4GB) will be bounced, but this could > be because that's just the amount of memory the box has you dumped this > info from. Hey, I got a bug report of a compile error and dove into bogus-looking code around it meant to cater to antediluvian kernel versions and the maintainer's preference for an identical driver across bunches of kernel versions. I've heard the bit about the midlayer preventing these conditions entirely a dozen times in the past 2 hours. =( -- wli - 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/