Subject: Re: [RFC PATCH] asynchronous page fault.
From: Peter Zijlstra <peterz@infradead.org>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
       "linux-mm@kvack.org" <linux-mm@kvack.org>,
       "minchan.kim@gmail.com" <minchan.kim@gmail.com>,
       cl@linux-foundation.org
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Date: Mon, 28 Dec 2009 12:06:01 +0100
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On Mon, 2009-12-28 at 19:57 +0900, KAMEZAWA Hiroyuki wrote:
>   - because pmd has some trobles because of quicklists..I don't wanted to
>     touch free routine of them. 

I really doubt the value of that quicklist horror. IIRC x86 stopped
supporting that a while ago as well.

I would suspect the page-table retention scheme possible with RCU freed
page tables could be far more efficient than quicklists, but then that's
all speculation since I don't know what kind of workloads we're talking
about and this glaring lack of implementation to compare.

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