From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: SC1200 failure in 2.6.23 and 2.6.24-rc1-git10 Date: Fri, 09 Nov 2007 10:44:31 +0900 Message-ID: <4733BB7F.8010004@gmail.com> References: <20071101213013.M54162@visp.net.lb> <20071107232045.GA26706@havoc.gtf.org> <20071107235548.M95675@visp.net.lb> <200711080130.54143.bzolnier@gmail.com> <20071108071204.M66693@visp.net.lb> <20071108104813.78ca4d65@the-village.bc.nu> <20071108164320.M82021@visp.net.lb> <20071108173139.GA1932@havoc.gtf.org> <20071108195605.M20599@visp.net.lb> Mime-Version: 1.0 Content-Type: text/plain; charset=KOI8-R Content-Transfer-Encoding: 7bit Return-path: Received: from wa-out-1112.google.com ([209.85.146.181]:58673 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751667AbXKIBon (ORCPT ); Thu, 8 Nov 2007 20:44:43 -0500 Received: by wa-out-1112.google.com with SMTP id v27so445155wah for ; Thu, 08 Nov 2007 17:44:42 -0800 (PST) In-Reply-To: <20071108195605.M20599@visp.net.lb> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Denys Fedoryshchenko Cc: Jeff Garzik , Alan Cox , Bartlomiej Zolnierkiewicz , Mark Lord , James Andrewartha , Andrew Morton , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org Denys Fedoryshchenko wrote: > Thanks, it works like that. > > Seems in libata there is no fall-back to non-DMA mode, if DMA didn't work. There is, it's just too conservative about that. With improvements pending for 2.6.24, it should be quite snappy at falling back to PIO if configured transfer mode doesn't seem to work at all (consecutive IO command failures after transfer mode configuration change). -- tejun