linux-kernel - Re: [PATCH v4 00/20] xen/arm64: Add support for 64KB page in Linux

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Message-ID: <alpine.DEB.2.02.1510061450230.1179@kaball.uk.xensource.com>
Date:	Tue, 6 Oct 2015 14:55:57 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Roger Pau Monné <roger.pau@...rix.com>
CC:	Ian Campbell <ian.campbell@...rix.com>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	Julien Grall <julien.grall@...rix.com>,
	<xen-devel@...ts.xenproject.org>, <wei.liu2@...rix.com>,
	<konrad.wilk@...cle.com>, <linux-kernel@...r.kernel.org>,
	<david.vrabel@...rix.com>, <boris.ostrovsky@...cle.com>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v4 00/20] xen/arm64: Add support for 64KB page in Linux

On Tue, 6 Oct 2015, Roger Pau Monné wrote:
> Do KVM guests also need such extensive set of modifications in order to
> run using 64KB pages? I know it's not fair to compare KVM and Xen in
> this regard, because the interfaces are very different, but that's what
> developers are going to look at.

QEMU doesn't need extensive modifications to run 64K guests on a 4K
host, but on the other hand KVM needs its own set of non-trivial
modifications to do it.