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Date: Mon, 19 Mar 2007 16:53:29 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Christoph Lameter <clameter@sgi.com>
Cc: linux-mm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [QUICKLIST 1/5] Quicklists for page table pages V3
Message-Id: <20070319165329.b5830789.akpm@linux-foundation.org>
In-Reply-To: <20070319233716.13775.45569.sendpatchset@schroedinger.engr.sgi.com>
References: <20070319233716.13775.45569.sendpatchset@schroedinger.engr.sgi.com>
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On Mon, 19 Mar 2007 15:37:16 -0800 (PST)
Christoph Lameter <clameter@sgi.com> wrote:

> This patchset introduces an arch independent framework to handle lists
> of recently used page table pages to replace the existing (ab)use of the
> slab for that purpose.
> 
> 1. Proven code from the IA64 arch.

Has it been proven that quicklists are superior to simply going direct to the
page allocator for these pages?

Would it provide a superior solution if we were to a) stop zeroing out the
pte's when doing a fullmm==1 teardown and b) go direct to the page allocator
for these pages?