Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755172AbZCYURa (ORCPT ); Wed, 25 Mar 2009 16:17:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752429AbZCYURW (ORCPT ); Wed, 25 Mar 2009 16:17:22 -0400 Received: from srv5.dvmed.net ([207.36.208.214]:36264 "EHLO mail.dvmed.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751401AbZCYURV (ORCPT ); Wed, 25 Mar 2009 16:17:21 -0400 Message-ID: <49CA9114.3040205@garzik.org> Date: Wed, 25 Mar 2009 16:16:20 -0400 From: Jeff Garzik User-Agent: Thunderbird 2.0.0.21 (X11/20090320) MIME-Version: 1.0 To: Ric Wheeler CC: Jens Axboe , Linus Torvalds , 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 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> <49CA8ADA.3040709@redhat.com> In-Reply-To: <49CA8ADA.3040709@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -4.4 (----) X-Spam-Report: SpamAssassin version 3.2.5 on srv5.dvmed.net summary: Content analysis details: (-4.4 points, 5.0 required) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 731 Lines: 22 Ric Wheeler wrote:> And, as I am sure that you do know, to add insult to injury, FLUSH_CACHE > is per device (not file system). > > When you issue an fsync() on a disk with multiple partitions, you will > flush the data for all of its partitions from the write cache.... SCSI'S SYNCHRONIZE CACHE command already accepts an (LBA, length) pair. We could make use of that. And I bet we could convince T13 to add FLUSH CACHE RANGE, if we could demonstrate clear benefit. Jeff -- 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/