linux-kernel - Re: [PATCH] emulate accessed bit for EPT

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Message-ID: <20100205181413.GV5959@random.random>
Date:	Fri, 5 Feb 2010 19:14:13 +0100
From:	Andrea Arcangeli <aarcange@...hat.com>
To:	Marcelo Tosatti <mtosatti@...hat.com>
Cc:	Rik van Riel <riel@...hat.com>, balbir@...ux.vnet.ibm.com,
	jdike@...toit.com, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, avi@...hat.com
Subject: Re: [PATCH] emulate accessed bit for EPT

On Fri, Feb 05, 2010 at 03:34:23PM -0200, Marcelo Tosatti wrote:
> But perhaps a module parameter to turn accessed bit emulation off might
> be handy in the future?

Maybe, but somebody should show that this can overall become a
downside, which I doubt... I think if it does, the VM is to blame for
calling page_referenced when there is no point to do so just yet.
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