Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964876AbWL1CZG (ORCPT ); Wed, 27 Dec 2006 21:25:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964886AbWL1CZF (ORCPT ); Wed, 27 Dec 2006 21:25:05 -0500 Received: from wx-out-0506.google.com ([66.249.82.225]:40621 "EHLO wx-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964876AbWL1CZE (ORCPT ); Wed, 27 Dec 2006 21:25:04 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:user-agent:mime-version:to:cc:subject:references:in-reply-to:x-enigmail-version:content-type:content-transfer-encoding; b=p0gA2pXcvmwNcqYnGXmBccENeMypoP8pSJxthoXf69+nwx6sqII9Gfn+IG0Y0M/1IedaKmA2RJdI2m2DwJh+iBF4hVc1RLjFmhdKxQrO+j4MjOEr7jSYdBW0z/hLpA0WSr33rQbaHyRsZbik18wteNbdBSCfotxZ3RrsBaW6wBs= Message-ID: <45932AF1.9040900@gmail.com> Date: Thu, 28 Dec 2006 11:24:49 +0900 From: Tejun Heo User-Agent: Icedove 1.5.0.9 (X11/20061220) MIME-Version: 1.0 To: Rene Herman CC: Alan Cox , linux-kernel@vger.kernel.org Subject: Re: PATA -- pata_amd on 2.6.19 fails to IDENTIFY my DVD-ROM References: <45893CAD.9050909@gmail.com> <45921E73.1080601@gmail.com> <4592B25A.4040906@gmail.com> In-Reply-To: <4592B25A.4040906@gmail.com> X-Enigmail-Version: 0.94.1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1371 Lines: 47 Rene Herman wrote: > Tejun Heo wrote: > >> Rene Herman wrote: > >>> I just tried the PATA driver for my AMD756 chip. During boot, it hangs >>> for 3 minutes failing to identify my DVD-ROM (secondary slave) and does >>> not give me access to it after it timed out. >> >> Please give a shot at v2.6.20-rc2 and report what the kernel says. > > This IDENTIFY issue seems already fixed in -rc2. No more pause, and my > DVD-ROM works fine again. Great. > Unfortunately, another issue seems to have > cropped up. On 2.6.20-rc2, hdparm -t /dev/sda gets me ~ 24 M/s while > both the old IDE driver and the 2.6.19 PATA driver do ~ 50 M/s > > 2.6.20-rc2-ata: > > # hdparm -t /dev/sda > > /dev/sda: > Timing buffered disk reads: 72 MB in 3.03 seconds = 23.75 MB/sec > > 2.6.19-ata: > > # hdparm -t /dev/sda > > /dev/sda: > Timing buffered disk reads: 150 MB in 3.00 seconds = 49.94 MB/sec Everything seems fine in the dmesg. Performance degradation is probably some other issue in -rc kernel. I'm suspecting recently fixed block layer bug. If it's still the same in the next -rc, please report. Thanks. -- tejun - 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/