Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757769AbZCZBpa (ORCPT ); Wed, 25 Mar 2009 21:45:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754754AbZCZBpW (ORCPT ); Wed, 25 Mar 2009 21:45:22 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:38800 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753285AbZCZBpV (ORCPT ); Wed, 25 Mar 2009 21:45:21 -0400 Date: Wed, 25 Mar 2009 18:36:05 -0700 (PDT) From: Linus Torvalds X-X-Sender: torvalds@localhost.localdomain To: Ric Wheeler cc: Jeff Garzik , Theodore Tso , Ingo Molnar , Alan Cox , Arjan van de Ven , Andrew Morton , Peter Zijlstra , Nick Piggin , David Rees , Jesper Krogh , Linux Kernel Mailing List Subject: Re: Linux 2.6.29 In-Reply-To: <49CACC4A.2080600@redhat.com> Message-ID: References: <20090324093245.GA22483@elte.hu> <20090324101011.6555a0b9@lxorguk.ukuu.org.uk> <20090324103111.GA26691@elte.hu> <20090324132032.GK5814@mit.edu> <20090324184549.GE32307@mit.edu> <49C93AB0.6070300@garzik.org> <20090325093913.GJ27476@kernel.dk> <49CA86BD.6060205@garzik.org> <20090325194341.GB27476@kernel.dk> <49CA9346.6040108@garzik.org> <49CA9AD2.1080402@redhat.com> <49CACC4A.2080600@redhat.com> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 624 Lines: 17 On Wed, 25 Mar 2009, Ric Wheeler wrote: > > In this case, you have not gained anything - same number of barrier > operations/cache flushes and looser semantics for the transactions? Um. Except you gained the fact that the filesystem doesn't have to care and screw it up. And then we can know that it gets done, regardless of what odd things the low-level fs does. Linus -- 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/