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Date: Mon, 10 Apr 2006 13:20:59 -0700 (PDT)
From: Christoph Lameter <clameter@sgi.com>
To: Dave McCracken <dmccr@us.ibm.com>
cc: Hugh Dickins <hugh@veritas.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Linux Memory Management <linux-mm@kvack.org>,
       Adam Litke <agl@us.ibm.com>, wli@holomorphy.com
Subject: Re: [RFC/PATCH] Shared Page Tables [0/2]
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On Mon, 10 Apr 2006, Dave McCracken wrote:

> The lock changes to hugetlb are only to support sharing of pmd pages when
> they contain hugetlb pages.  They just substitute the struct page lock for
> the page_table_lock, and are only about 30 lines of code.  Is this really
> worth separating out?

Ia64 does not use pmd pages for huge pages. It relies instead on a 
separate region. I wonder if this works on IA64.