linux-kernel - Re: [PATCH v3 2/2] xen/setup: Remap Xen Identity Mapped RAM

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Message-ID: <53FDB2BA.8080506@citrix.com>
Date:	Wed, 27 Aug 2014 11:28:10 +0100
From:	David Vrabel <david.vrabel@...rix.com>
To:	Matt Rushton <mvrushton@...il.com>, <konrad.wilk@...cle.com>,
	<boris.ostrovsky@...cle.com>
CC:	<msw@...zon.com>, <linux-kernel@...r.kernel.org>,
	<xen-devel@...ts.xensource.com>, Matt Rushton <mrushton@...zon.com>
Subject: Re: [PATCH v3 2/2] xen/setup: Remap Xen Identity Mapped RAM

On 11/08/14 18:34, Matt Rushton wrote:
> Instead of ballooning up and down dom0 memory this remaps the existing mfns
> that were replaced by the identity map. The reason for this is that the
> existing implementation ballooned memory up and and down which caused dom0
> to have discontiguous pages. In some cases this resulted in the use of bounce
> buffers which reduced network I/O performance significantly. This change will
> honor the existing order of the pages with the exception of some boundary
> conditions.

Applied to devel/for-linus-3.18.

Patch #1 is already present in 3.17-rc1.

Thanks.

David
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