Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758154Ab0BMXCQ (ORCPT ); Sat, 13 Feb 2010 18:02:16 -0500 Received: from mail-yx0-f196.google.com ([209.85.210.196]:62147 "EHLO mail-yx0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752527Ab0BMXCO (ORCPT ); Sat, 13 Feb 2010 18:02:14 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=PzBA3s4RdWrcLGNWj8wMQ/CwsH361wVScvGdCQZaGKCJijaCIF03oeDrNoLuRv7LkS KyGdhukUGWTeAFfdFiHSO82g7PVqZgL300JQjpKkif/AEG2t8GCnwAg/uxtwBIVlWn3H KkNv5zstJDomIMc6JO/EPAF7+0Pro5473QqB4= Message-ID: <4B772F74.1030509@garzik.org> Date: Sat, 13 Feb 2010 18:02:12 -0500 From: Jeff Garzik User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.7) Gecko/20100120 Fedora/3.0.1-1.fc11 Thunderbird/3.0.1 MIME-Version: 1.0 To: Robert Hancock CC: linux-kernel , ide , Mike Cui , Peer Chen , Allen Martin Subject: Re: [PATCH] ahci: disable FPDMA auto-activate optimization on NVIDIA AHCI References: <4B5FC213.1060601@gmail.com> <4B772BE2.30108@garzik.org> <51f3faa71002131453m4dd2b82cgd8b874866146da60@mail.gmail.com> In-Reply-To: <51f3faa71002131453m4dd2b82cgd8b874866146da60@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1653 Lines: 45 On 02/13/2010 05:53 PM, Robert Hancock wrote: > On Sat, Feb 13, 2010 at 4:46 PM, Jeff Garzik wrote: >> On 01/26/2010 11:33 PM, Robert Hancock wrote: >>> >>> Mike Cui reported that his system with an NVIDIA MCP79 (aka MCP7A) chipset >>> stopped working with 2.6.32. The problem appears to be that 2.6.32 now >>> enables >>> the FPDMA auto-activate optimization in the ahci driver. The drive works >>> fine >>> with this enabled on an Intel AHCI so this appears to be a chipset bug. >>> Since MCP79 is a fairly recent NVIDIA chipset and we don't have any info >>> on >>> whether any other NVIDIA chipsets have this issue, disable FPDMA AA >>> optimization >>> on all NVIDIA AHCI controllers for now. >>> >>> Should address http://bugzilla.kernel.org/show_bug.cgi?id=14922 >>> >>> Signed-off-by: Robert Hancock >>> >>> --- >>> >>> Mike, can you test this out and make sure this resolves the problem for >>> you? >> >> Sigh... we never did hear back from Mike or NVIDIA on this one, did we? >> I've been watching for a response, and haven't seen one to date. > > No, I haven't seen a response. It's pretty apparent it should fix the > problem based on earlier testing, but it would be nice to find out for > sure which chipsets this affects. Yep, that's my main concern... being overly aggressive and zapping it on all NVIDIA chipsets, even future ones. Jeff -- 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/