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Date:      Thu, 18 Oct 2001 13:31:01 -0400
From:      Chris Johnson <cjohnson@palomine.net>
To:        "David W. Chapman Jr." <dwcjr@inethouston.net>
Cc:        stable@FreeBSD.ORG
Subject:   Re: dirpref gives massive performance boost
Message-ID:  <20011018133100.A4472@palomine.net>
In-Reply-To: <01c101c157f9$87868da0$fe0c4042@inethouston.net>; from dwcjr@inethouston.net on Thu, Oct 18, 2001 at 12:22:57PM -0500
References:  <20010928141246.A15515@xor.obsecurity.org> <20011002212002.4034283f.steveo@eircom.net> <20011002214353.A653@student.uu.se> <20011018083713.A20403@polands.org> <20011018144850.A1943@shikima.mine.nu> <20011018105736.A43973@leviathan.inethouston.net> <p05101005b7f4bb89498e@[128.113.24.47]> <01c101c157f9$87868da0$fe0c4042@inethouston.net>

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On Thu, Oct 18, 2001 at 12:22:57PM -0500, David W. Chapman Jr. wrote:
> > Dirpref is not something which is "enabled" or "disabled", not in
> > the same sense as softupdates is "enabled".
> >
> > Dirpref is a smarter layout of information in a partition.  You
> > need a version of the system which knows HOW to do that smarter
> > layout, and then you just rebuild the partition.  There is no
> > switch to turn on and off.
> >
> I'm not looking to turn if off or on, just to see whether a file system of
> mine has that capability in it or if I need to newfs it.

If your kernel has the capability--i.e. you built it after the dirpref code was
added--then all your file systems have the capability. It can't not be enabled.

Chris Johnson

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