From owner-freebsd-geom@FreeBSD.ORG Thu Aug 10 22:39:57 2006 Return-Path: X-Original-To: freebsd-geom@FreeBSD.org Delivered-To: freebsd-geom@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3428B16A4E5; Thu, 10 Aug 2006 22:39:57 +0000 (UTC) (envelope-from pjd@garage.freebsd.pl) Received: from mail.garage.freebsd.pl (arm132.internetdsl.tpnet.pl [83.17.198.132]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8E38743D46; Thu, 10 Aug 2006 22:39:55 +0000 (GMT) (envelope-from pjd@garage.freebsd.pl) Received: by mail.garage.freebsd.pl (Postfix, from userid 65534) id 468B451392; Fri, 11 Aug 2006 00:39:54 +0200 (CEST) Received: from localhost (dkd162.neoplus.adsl.tpnet.pl [83.24.7.162]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.garage.freebsd.pl (Postfix) with ESMTP id 685045138F; Fri, 11 Aug 2006 00:39:50 +0200 (CEST) Date: Fri, 11 Aug 2006 00:39:01 +0200 From: Pawel Jakub Dawidek To: Jan Srzednicki Message-ID: <20060810223901.GC1389@garage.freebsd.pl> References: <20060808195202.GA1564@garage.freebsd.pl> <20060810192152.GE57857@europa.expro.pl> <20060810194304.GB1345@garage.freebsd.pl> <20060810200135.GF57857@europa.expro.pl> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="2JFBq9zoW8cOFH7v" Content-Disposition: inline In-Reply-To: <20060810200135.GF57857@europa.expro.pl> X-PGP-Key-URL: http://people.freebsd.org/~pjd/pjd.asc X-OS: FreeBSD 7.0-CURRENT i386 User-Agent: mutt-ng/devel-r804 (FreeBSD) X-Spam-Checker-Version: SpamAssassin 3.0.4 (2005-06-05) on mail.garage.freebsd.pl X-Spam-Level: X-Spam-Status: No, score=-0.5 required=3.0 tests=BAYES_00,RCVD_IN_NJABL_DUL, RCVD_IN_SORBS_DUL autolearn=no version=3.0.4 Cc: freebsd-fs@FreeBSD.org, freebsd-current@FreeBSD.org, freebsd-geom@FreeBSD.org Subject: Re: GJournal (hopefully) final patches. X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Aug 2006 22:39:57 -0000 --2JFBq9zoW8cOFH7v Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 10, 2006 at 10:01:35PM +0200, Jan Srzednicki wrote: > On Thu, Aug 10, 2006 at 09:43:04PM +0200, Pawel Jakub Dawidek wrote: > > On Thu, Aug 10, 2006 at 09:21:52PM +0200, Jan Srzednicki wrote: > > >=20 > > > Hello, > > >=20 > > > I'd happily perform some testing, only if the aac(4) driver would also > > > be patched. I know I can run gjournal w/o the BIO_FLUSH feature, but > > > that would make any performance results rather worthles, wouldn't it? > >=20 > > From my tests BIO_FLUSH doesn't have huge impact on performance (if at > > all), but I suspect it greatly depends on specific HW. > >=20 > > Unfortunately I'm not able to implement BIO_FLUSH to all out storage > > drivers. Currently BIO_FLUSH is supported by ata(4) (/dev/a[dr]X), > > da(4) and amr(4). >=20 > I see. Does that mean that all CAM-interfaced devices (like asr(4) or > twa(4)) have this feature fully implemented? That's the theory. I'm using standard SCSI commands for this. From the tests we made it seems that it works ok with twa(4)/twe(4). I'd still be glad if someone with SCSI/CAM foo could look at the code. --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --2JFBq9zoW8cOFH7v Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (FreeBSD) iD8DBQFE27WFForvXbEpPzQRAsFkAJ46DsXZV5L5AUJiHiS7eiB0rdAFowCeOdTb r2YyP364McN1aci/YjNokQs= =XR71 -----END PGP SIGNATURE----- --2JFBq9zoW8cOFH7v--