linux-kernel - Re: [rfc] no ZERO

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Date:	Wed, 4 Apr 2007 15:05:59 +0200
From:	Andrea Arcangeli <andrea@...e.de>
To:	Hugh Dickins <hugh@...itas.com>
Cc:	Nick Piggin <npiggin@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Memory Management List <linux-mm@...ck.org>,
	tee@....com, holt@....com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [rfc] no ZERO_PAGE?

On Wed, Apr 04, 2007 at 01:45:06PM +0100, Hugh Dickins wrote:
> I'm confused.  CONFIG_ZERO_PAGE off is where we'd like to end up: how
> would turning CONFIG_ZERO_PAGE on in -rc kernels help us to get there?

He most certainly meant on by default.

I think if we do this, we also need a zeropage counter in the vm stats
so that we'll get a measure of the waste and it'll be possible to
identify apps to optimize/fix.
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