From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269045AbUINGID (ORCPT ); Tue, 14 Sep 2004 02:08:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269063AbUINGID (ORCPT ); Tue, 14 Sep 2004 02:08:03 -0400 Received: from ns.virtualhost.dk ([195.184.98.160]:58292 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id S269045AbUINGIA (ORCPT ); Tue, 14 Sep 2004 02:08:00 -0400 Date: Tue, 14 Sep 2004 08:06:29 +0200 From: Jens Axboe To: "C.Y.M." Cc: linux-kernel@vger.kernel.org, Alan Cox Subject: Re: Changes to ide-probe.c in 2.6.9-rc2 causing improper detection Message-ID: <20040914060628.GC2336@suse.de> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Sep 13 2004, C.Y.M. wrote: > After installing 2.6.9-rc2 on my PC today (x86 VIA Chipset motherboard and > Athlon XP CPU), The IDE detection during boot in probing for ide2-5 and > displaying errors, and the hard drives that it does find are telling me that > "hda: cache flushes not supported" (when they are displayed as supported > when using 2.6.9-rc1. Your drive doesn't advertise FLUSH_CACHE support, the model for when we use these commands changed between -rc1 and -rc2. This essentially means that you have to turn off write back caching for safe operations on a journalled drive. Alan, I bet there are a lot of these. Maybe we should consider letting the user manually flag support for FLUSH_CACHE, at least it is in their hands then. -- Jens Axboe