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To: Poul-Henning Kamp <phk@FreeBSD.org>
Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/vm vm_page.c 
In-reply-to: Your message of "Mon, 18 Dec 2000 12:12:13 PST."
             <200012182012.eBIKCDd31193@freefall.freebsd.org> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Mon, 18 Dec 2000 12:14:24 -0800
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>phk         2000/12/18 12:12:13 PST
>
>  Modified files:
>    sys/vm               vm_page.c 
>  Log:
>  Fix floppy drives on machines with lots of RAM.
>  
>  The fix works by reverting the ordering of free memory so that the
>  chances of contig_malloc() succeeding increases.
>  
>  PR:		23291
>  Submitted by:	Andrew Atrens <atrens@nortel.ca>
>  
>  Revision  Changes    Path
>  1.155     +2 -2      src/sys/vm/vm_page.c

   You've just significantly reduced the performance of FreeBSD in the
process. FreeBSD does HEAD insertions in order to minimize cache thrashing.
This is not an appropriate fix for the problem that you're trying to fix
and I want to see this change backed out.

-DG

David Greenman
Co-founder, The FreeBSD Project - http://www.freebsd.org
President, TeraSolutions, Inc. - http://www.terasolutions.com
Pave the road of life with opportunities.


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