Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755826AbXLJJtt (ORCPT ); Mon, 10 Dec 2007 04:49:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751705AbXLJJtm (ORCPT ); Mon, 10 Dec 2007 04:49:42 -0500 Received: from py-out-1112.google.com ([64.233.166.181]:56329 "EHLO py-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751407AbXLJJtl (ORCPT ); Mon, 10 Dec 2007 04:49:41 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=TpS42H+fwLdiYQ5uRlFwd0pJJQW8JWvfue+Or54e6UQHVhxMbdgPQoooFAncb7kIEXFFAhqzkp4Gsu9XvmZ73PE3ykv1Hn2zndvCbC1qXgbG4l8MC3F7YAtYar0fOAJbZZ4yKc965XpRc4GooTEYaibYWJ4fE6LjxljDVSCJHnE= Message-ID: <4104961b0712100149h69b1e1fas355b770f93affd03@mail.gmail.com> Date: Mon, 10 Dec 2007 17:49:37 +0800 From: "jidong xiao" To: linux-kernel@vger.kernel.org Subject: What does "ordering by draining" mean? MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 556 Lines: 17 Hi, I am reading the source code of block I/O layer, and now seeing there saying "ordering by draining" or "ordering by tag" in include/blkdev.h,and the comments in that file says: "Hardbarrier is supported with one of the following methods", but what do these two methods exactly mean? Thanks Regards Jason -- 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/