Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965245AbWJLBIy (ORCPT ); Wed, 11 Oct 2006 21:08:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965247AbWJLBIy (ORCPT ); Wed, 11 Oct 2006 21:08:54 -0400 Received: from smtp.osdl.org ([65.172.181.4]:40633 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S965245AbWJLBIx (ORCPT ); Wed, 11 Oct 2006 21:08:53 -0400 Date: Wed, 11 Oct 2006 18:08:44 -0700 From: Andrew Morton To: "Ulrich Windl" Cc: linux-kernel@vger.kernel.org Subject: Re: Q: I/O to block devices Message-Id: <20061011180844.d7119152.akpm@osdl.org> In-Reply-To: <452A5115.27596.1451223@Ulrich.Windl.rkdvmks1.ngate.uni-regensburg.de> References: <452A5115.27596.1451223@Ulrich.Windl.rkdvmks1.ngate.uni-regensburg.de> X-Mailer: Sylpheed version 2.2.7 (GTK+ 2.8.6; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 567 Lines: 14 On Mon, 09 Oct 2006 13:39:34 +0200 "Ulrich Windl" wrote: > I'm surprised: To my knowledge I/O to block devices is synchronous (at least write > I thought) Nope. But the kernel will sync the device on the final close. Try doing `sleep 10000000 < /dev/sda &' and the run the tests... - 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/