From owner-freebsd-arch  Sun Oct 14 19:56:57 2001
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Date: Sun, 14 Oct 2001 19:56:53 -0700 (PDT)
From: Matt Dillon <dillon@earth.backplane.com>
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To: "David O'Brien" <obrien@FreeBSD.ORG>
Cc: cvs-committers@FreeBSD.ORG, freebsd-arch@FreeBSD.ORG
Subject: Re: cvs commit: src/sbin/newfs newfs.8 newfs.c
References: <200110110851.f9B8ptf60343@freefall.freebsd.org> <20011011112527.A54224@coffee.q9media.com> <20011011154203.C44561@dragon.nuxi.com> <20011013143225.B4527@ns2.freenix.org> <20011013172706.A53976@dragon.nuxi.com> <20011014160303.A22301@ns2.freenix.org> <20011014194232.A50125@dragon.nuxi.com>
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:On Sun, Oct 14, 2001 at 04:03:03PM +0200, Ollivier Robert wrote:
:> Speaking of changing that value, shouldn't we also change the default block
:> and fragment values ?
:> 
:> It has been said in the lists many times that 16k/2k is more efficient
:> (and I'm using it myself by defautl now).
:
:There has been rummored problems if you use something other than 8k/1k.
:This is probably something that should run thru -arch or -hackers before
:doing it.  
:"-c" was a no-brainer as noone has ever argued that a low "-c" was
:prefered (that I've seen).

    You can use 16K/2K safely.  Anything larger may fragment the buffer
    cache's KVA space and create issues.  There are no known bugs (other
    then fragmentation), but people have sporatically reported weirdness
    with other combinations.  There have been no solid bug reports.

					-Matt


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