linux-kernel - Re: [PATCH V4 00/10] xen: Switch to virtual mapped linear p2m list

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Message-ID: <20141202185446.GD32622@laptop.dumpdata.com>
Date:	Tue, 2 Dec 2014 13:54:46 -0500
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Juergen Gross <jgross@...e.com>
Cc:	David Vrabel <david.vrabel@...rix.com>,
	linux-kernel@...r.kernel.org, xen-devel@...ts.xensource.com,
	boris.ostrovsky@...cle.com, x86@...nel.org, tglx@...utronix.de,
	mingo@...hat.com, hpa@...or.com, andrew.cooper3@...rix.com
Subject: Re: [PATCH V4 00/10] xen: Switch to virtual mapped linear p2m list

On Mon, Dec 01, 2014 at 01:54:11PM +0100, Juergen Gross wrote:
> On 12/01/2014 12:31 PM, David Vrabel wrote:
> >On 28/11/14 10:53, Juergen Gross wrote:
> >>Paravirtualized kernels running on Xen use a three level tree for
> >>translation of guest specific physical addresses to machine global
> >>addresses. This p2m tree is used for construction of page table
> >>entries, so the p2m tree walk is performance critical.
> >>
> >>By using a linear virtual mapped p2m list accesses to p2m elements
> >>can be sped up while even simplifying code. To achieve this goal
> >>some p2m related initializations have to be performed later in the
> >>boot process, as the final p2m list can be set up only after basic
> >>memory management functions are available.
> >
> >What are the results of the testing I asked for?
> 
> You asked for those replying to the patch introducing the linear
> mapping. So I added the description of the tested scenarios in the
> patch description of that patch.
> 
> >If Konrad or Boris are happy with this series I think it can go into 3.19.
> 
> Great, thanks!

I am happy.

> 
> 
> Juergen
> 
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