From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: sata_via Date: Sun, 13 Apr 2008 11:45:31 +0900 Message-ID: <480173CB.5070805@gmail.com> References: <47F694C8.8020507@wesmo.com> <47F6A5E8.1030602@garzik.org> <47F6BD55.3090708@wesmo.com> <5699f8f00804050015kb1ebb1cpf3ab8b587580fffd@mail.gmail.com> <47F7982E.5080701@wesmo.com> <47F7F463.2060402@garzik.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from rv-out-0708.google.com ([209.85.198.242]:28168 "EHLO rv-out-0506.google.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753068AbYDMCpk (ORCPT ); Sat, 12 Apr 2008 22:45:40 -0400 Received: by rv-out-0506.google.com with SMTP id k29so308067rvb.1 for ; Sat, 12 Apr 2008 19:45:39 -0700 (PDT) In-Reply-To: <47F7F463.2060402@garzik.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Jeff Garzik Cc: Rich West , Wander Winkelhorst , linux-kernel@vger.kernel.org, Linux IDE mailing list Jeff Garzik wrote: > Rich West wrote: >> I was only curious as to what turning off power management support >> would buy with regard to the sata timeout issue. > > > ACPI is not only power management. It is all the information your > hardware conveys to your OS, about the setup and workings of your hardware. > > Without ACPI, non-PM things like SMP, laptop dock/undock, and many other > gadgets fail to function (or are configured sub-optimally). > > ACPI sets up interrupt routing, and Linux history is _loaded_ with > _years_ of problem reports that appear as timeouts, only to be resolved > as ACPI interrupt bugs (aka BIOS bugs, since ACPI tables come from BIOS). Also, please give a shot at the sacred "irqpoll". -- tejun