[0/8] Predictive bitmaps for ELF executables [LWN.net]

From:		David Miller <davem@davemloft.net>
To:		akpm@linux-foundation.org
Subject:		Re: [PATCH prototype] [0/8] Predictive bitmaps for ELF executables
Date:		Wed, 19 Mar 2008 17:09:37 -0700 (PDT)
Message-ID:		<20080319.170937.247919863.davem@davemloft.net>
Cc:		drepper@gmail.com, andi@firstfloor.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
Archive-link:		Article, Thread

From: Andrew Morton <akpm@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.