From: Andrew Morton <akpm <at> linux-foundation.org>
Date: Wed, 19 Mar 2008 16:12:11 -0700

> I did some work on that many years ago and I do recall that it
> helped, but I forget how much.

I wrote such a patch ages ago as well.

Frankly, based upon my experiences then and what I know now, I think
it's a lose to do this.

Better to 1) have enough ram and 2) make the reclaim smarter about
important "executable" page cache pages.