Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261248AbVEPCcF (ORCPT ); Sun, 15 May 2005 22:32:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261253AbVEPCcF (ORCPT ); Sun, 15 May 2005 22:32:05 -0400 Received: from cpu1185.adsl.bellglobal.com ([207.236.110.166]:61959 "EHLO mail.rtr.ca") by vger.kernel.org with ESMTP id S261248AbVEPCcD (ORCPT ); Sun, 15 May 2005 22:32:03 -0400 Message-ID: <42880620.8000300@rtr.ca> Date: Sun, 15 May 2005 22:32:00 -0400 From: Mark Lord User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.7) Gecko/20050420 Debian/1.7.7-2 X-Accept-Language: en, en-us MIME-Version: 1.0 To: Gene Heskett Cc: linux-kernel@vger.kernel.org Subject: Re: Disk write cache (Was: Hyper-Threading Vulnerability) References: <1115963481.1723.3.camel@alderaan.trey.hu> <200505151121.36243.gene.heskett@verizon.net> <20050515152956.GA25143@havoc.gtf.org> <200505152156.18194.gene.heskett@verizon.net> In-Reply-To: <200505152156.18194.gene.heskett@verizon.net> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 700 Lines: 15 >took place on another list, and wrote a test gizmo that copied a >large file, then slept for 1 second and issued a sync command. No >drive led activity until the usual 5 second delay of the filesystem >had expired. To me, that indicated that the sync command was being There's your clue. The drive LEDs normally reflect activity over the ATA bus (the cable!). If they're not on, then the drive isn't receiving data/commands from the host. Cheers - 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/