linux-kernel - Re: [PATCH] mmu notifiers #v2

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Message-ID: <20080116124256.44033d48@bree.surriel.com>
Date:	Wed, 16 Jan 2008 12:42:55 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Andrea Arcangeli <andrea@...ranet.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	kvm-devel@...ts.sourceforge.net, Avi Kivity <avi@...ranet.com>,
	Izik Eidus <izike@...ranet.com>, clameter@....com,
	daniel.blueman@...drics.com, holt@....com, steiner@....com,
	Andrew Morton <akpm@...l.org>, Hugh Dickins <hugh@...itas.com>,
	Nick Piggin <npiggin@...e.de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: Re: [PATCH] mmu notifiers #v2

On Sun, 13 Jan 2008 17:24:18 +0100
Andrea Arcangeli <andrea@...ranet.com> wrote:

> In my basic initial patch I only track the tlb flushes which should be
> the minimum required to have a nice linux-VM controlled swapping
> behavior of the KVM gphysical memory. 

I have a vaguely related question on KVM swapping.

Do page accesses inside KVM guests get propagated to the host
OS, so Linux can choose a reasonable page for eviction, or is
the pageout of KVM guest pages essentially random?

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