Date: Thu, 14 Sep 2006 08:11:01 +0930 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: freebsd-stable@freebsd.org Cc: Pawel Jakub Dawidek <pjd@freebsd.org>, Christian Laursen <xi@borderworlds.dk> Subject: Re: gjournal and Softupdates Message-ID: <200609140811.19245.doconnor@gsoft.com.au> In-Reply-To: <20060913142329.GC70245@garage.freebsd.pl> References: <45066E19.2040405@kuehlbox.de> <ygfirjto0z2.fsf@dominion.borderworlds.dk> <20060913142329.GC70245@garage.freebsd.pl>
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--nextPart2444454.qAASHZU8ZZ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Wednesday 13 September 2006 23:53, Pawel Jakub Dawidek wrote: > On Tue, Sep 12, 2006 at 12:04:01PM +0200, Christian Laursen wrote: > > Ivan Voras <ivoras@fer.hr> writes: > > > - todays desktop drives can lie about writing data. SoftUpdates relies > > > on some assumptions about when the data is physically written to > > > media, and those are not always valid today > > > > I think journaling relies on the same assumptions. > > Not gjournal, because it uses BIO_FLUSH I/O requests which flushes disk > write cache when needed. It should be possible to use this same mechanism for SU too, right? Of course that may result in really poor write performance :) =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 --nextPart2444454.qAASHZU8ZZ Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (FreeBSD) iD8DBQBFCIkP5ZPcIHs/zowRAoCJAKCqpS5dZCqGj2WF1ruQulAn1cavJACfcu/q ll+yj9RFjUVOKXKQhdn4Jr4= =yFqA -----END PGP SIGNATURE----- --nextPart2444454.qAASHZU8ZZ--
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