Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269370AbUIIIXR (ORCPT ); Thu, 9 Sep 2004 04:23:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269371AbUIIIXQ (ORCPT ); Thu, 9 Sep 2004 04:23:16 -0400 Received: from mx1.redhat.com ([66.187.233.31]:48266 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S269370AbUIIIXP (ORCPT ); Thu, 9 Sep 2004 04:23:15 -0400 Subject: Re: bug in md write barrier support? From: Arjan van de Ven Reply-To: arjanv@redhat.com To: Jens Axboe Cc: Alan Cox , Neil Brown , Christoph Hellwig , Linux Kernel Mailing List In-Reply-To: <20040909080612.GJ1737@suse.de> References: <20040903172414.GA6771@lst.de> <16697.4817.621088.474648@cse.unsw.edu.au> <20040904082121.GB2343@suse.de> <16699.48946.29579.495180@cse.unsw.edu.au> <20040908092309.GD2258@suse.de> <1094650500.11723.32.camel@localhost.localdomain> <20040908154608.GN2258@suse.de> <1094682098.12280.19.camel@localhost.localdomain> <20040909080612.GJ1737@suse.de> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-LmWSUEbwzbhuqgD06Qnz" Organization: Red Hat UK Message-Id: <1094718179.2801.3.camel@laptop.fenrus.com> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 (1.4.6-2) Date: Thu, 09 Sep 2004 10:22:59 +0200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1103 Lines: 35 --=-LmWSUEbwzbhuqgD06Qnz Content-Type: text/plain Content-Transfer-Encoding: quoted-printable > Precisely, it's always possible to just drop queueing depth to zero at > that point. If I2O really does reorder around the cache flush (this > seems broken...), why does this seem broken? semantics of "cache flush guarantees that all io submitted prior to it hits the spindle" are quite sane imo; no guarantee of later submitted IO.. compare the unix "sync" command; same level of semantics. --=-LmWSUEbwzbhuqgD06Qnz Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQBBQBLjxULwo51rQBIRAtksAJ4wbVgaGhejqHdqqiiWbi3pfVftpQCgiSGl St9goKvy9wfWFXEKNTxyfD0= =XbEa -----END PGP SIGNATURE----- --=-LmWSUEbwzbhuqgD06Qnz-- - 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/