From owner-freebsd-stable@FreeBSD.ORG  Wed Sep 13 22:41:47 2006
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From: "Daniel O'Connor" <doconnor@gsoft.com.au>
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Date: Thu, 14 Sep 2006 08:11:01 +0930
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Cc: Pawel Jakub Dawidek <pjd@freebsd.org>,
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Subject: Re: gjournal and Softupdates
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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

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