Date: Mon, 1 May 2006 15:06:55 -0700 From: Peter Wemm <peter@wemm.org> To: Maxim Sobolev <sobomax@freebsd.org> 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 Message-ID: <200605011506.55821.peter@wemm.org> In-Reply-To: <44567E83.7010705@FreeBSD.org> References: <200605012122.k41LMcxB058613@repoman.freebsd.org> <44567E83.7010705@FreeBSD.org>
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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
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