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Date: Wed, 23 Mar 2005 12:17:23 -0500
From: Dave Jones <davej@redhat.com>
To: Giuseppe Bilotta <bilotta78@hotpop.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: dmesg verbosity [was Re: AGP bogosities]
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On Wed, Mar 23, 2005 at 05:49:47PM +0100, Giuseppe Bilotta wrote:
 > > > What are the cons of using "all of" the RAM at boot time to 
 > > > cache the boot disk?
 > 
 > Dave Jones wrote:
 > > It's memory that's otherwise unused. Once you start using the system
 > > anything cached will get reclaimed as its needed.
 > 
 > So there is no substantial loss? IOW, it would suffice to have 
 > all the "loaded at boot" stuff in the first <amount of RAM>
 > bytes of the hard disk?

It very likely also needs to be contiguous on-disk (Ie, no in-file
fragmentation). You want to limit the amount of seeking that gets
done so the drive readahead just performs continuous reads.

		Dave

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