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Date:      Thu, 10 Aug 2006 21:43:04 +0200
From:      Pawel Jakub Dawidek <pjd@FreeBSD.org>
To:        Jan Srzednicki <w@expro.pl>
Cc:        freebsd-fs@FreeBSD.org, freebsd-current@FreeBSD.org, freebsd-geom@FreeBSD.org
Subject:   Re: GJournal (hopefully) final patches.
Message-ID:  <20060810194304.GB1345@garage.freebsd.pl>
In-Reply-To: <20060810192152.GE57857@europa.expro.pl>
References:  <20060808195202.GA1564@garage.freebsd.pl> <20060810192152.GE57857@europa.expro.pl>

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On Thu, Aug 10, 2006 at 09:21:52PM +0200, Jan Srzednicki wrote:
> On Tue, Aug 08, 2006 at 09:52:02PM +0200, Pawel Jakub Dawidek wrote:
> > Hi.
> >=20
> > I'm pleased to announce hopefully the final gjournal patches.
> >=20
> [..]
> > Now you need to recompile the world and the kernel. Remember to add
> > 'options UFS_GJOURNAL' to your kernel configuration file.
> >=20
> > If there will be no bug reports nor strong objections, I'd like commit
> > gjournal in a week or two first to 7-CURRENT and then to 6-STABLE (maybe
> > before 6.2-RELEASE, but it depends on testing and feedback from users).
>=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?

=46rom my tests BIO_FLUSH doesn't have huge impact on performance (if at
all), but I suspect it greatly depends on specific HW.

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
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd@FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!

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