From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Mosberger <davidm@napali.hpl.hp.com>
Date: Wed, 01 Jun 2005 22:48:54 +0000
Subject: RE: [patch 0/4] ia64 SPARSEMEM
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To: linux-ia64@vger.kernel.org

>>>>> On Tue, 31 May 2005 11:14:22 -0700, Dave Hansen <haveblue@us.ibm.com> said:

  Dave> The pagetables that are walked in the TLB miss handler (for
  Dave> vmem_map[]) could just as easily be a set of two-level
  Dave> mem_section tables that are walked in software.

SPARSEMEM might be a lot more interesting if it could "degenerate"
into VIRTUAL_MEM_MAP.  That is, on platforms with enough virtual
space, you should be able to let the hardware/MMU-subsystem do the
translation.

	--david