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From: Peter Wemm <peter@wemm.org>
To: Maxim Sobolev <sobomax@freebsd.org>
Date: Mon, 1 May 2006 15:06:55 -0700
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Cc: cvs-src@freebsd.org, src-committers@freebsd.org, cvs-all@freebsd.org,
	Peter Wemm <peter@freebsd.org>
Subject: Re: cvs commit: src/sys/i386/i386 pmap.c
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On Monday 01 May 2006 14:32, Maxim Sobolev wrote:
> Just curious what does it bring us in terms of performance/memory
> savings?

Mostly neutral performance.  It allows us to free otherwise unused 
memory.

> -Maxim
>
> Peter Wemm wrote:
> > peter       2006-05-01 21:22:38 UTC
> >
> >   FreeBSD src repository
> >
> >   Modified files:
> >     sys/i386/i386        pmap.c
> >   Log:
> >   Using an idea from Stephan Uphoff, use the empty pte's that
> > correspond to the unused kva in the pv memory block to thread a
> > freelist through. This allows us to free pages that used to be used
> > for pv entry chunks since we can now track holes in the kva memory
> > block.
> >
> >   Idea from:  ups
> >
> >   Revision  Changes    Path
> >   1.555     +115 -50   src/sys/i386/i386/pmap.c

-- 
Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com
"All of this is for nothing if we don't go to the stars" - JMS/B5