Date: Mon, 25 Jul 2005 19:44:57 +0930 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: cvs-all@freebsd.org Cc: cvs-src@freebsd.org, src-committers@freebsd.org, Pawel Jakub Dawidek <pjd@freebsd.org> Subject: Re: cvs commit: src/sys/geom/zero g_zero.c src/sys/modules/geom/geom_zero Makefile Message-ID: <200507251944.58345.doconnor@gsoft.com.au> In-Reply-To: <200507251003.j6PA3Gr7003418@repoman.freebsd.org> References: <200507251003.j6PA3Gr7003418@repoman.freebsd.org>
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--nextPart1256411.3qMv0poXoI Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Monday 25 July 2005 19:33, Pawel Jakub Dawidek wrote: > Add a very simple and small GEOM class - ZERO. > It creates very huge provider (41PB) /dev/gzero. > On BIO_READ request it zero-fills bio_data and on BIO_WRITE it does > nothing. You can also set kern.geom.zero.clear sysctl to 0 to do nothing > even for BIO_READ. > > I'm using it for performance testing where it is very helpful. How long does a newfs take on that? ;) =2D-=20 Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C --nextPart1256411.3qMv0poXoI Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQBC5Lui5ZPcIHs/zowRAhyFAJ0eHd1RSG26x1vSupb1kMo58FJWugCdH6U5 Fp1zKx3InUWhm3KCKQxGzec= =jsLY -----END PGP SIGNATURE----- --nextPart1256411.3qMv0poXoI--
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