Re: [Xen-devel] Page tables in Xen

To:	"Daniel Stodden" <stodden@xxxxxxxxxx>
Subject:	Re: [Xen-devel] Page tables in Xen
From:	"Haifeng He" <hehaifeng2nd@xxxxxxxxx>
Date:	Thu, 29 Nov 2007 14:15:58 -0700
Cc:	weiming <zephyr.zhao@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Delivery-date:	Thu, 29 Nov 2007 13:16:36 -0800
Dkim-signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=QNSevZkMLDEb6kx1+VH9FPd/bIQV6A5a8dZXm17Bpu4=; b=vgnBhJw1eZr7XJWrHSXb1N0XGNAZj8JHX3PNZjSm72coVI23+BffAm5P7yW3BsRk5vYsjAsntY8XsAoApRnRNyphwWuc3Py56u4xYgIqVuKa/Nhp4u946jyuhFAn6E1NioBk4WrwE8PabH+5FX12pVbpBHP/dAct5GeTAoBBeA0=
Domainkey-signature:	a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=oT/kK2Ol5u9BS3CbmfXWV8WLhYaLTXv1jj50bG9cNEseQCZiwylStsT4qYHWzkhUJWCfqMZuj89omtWpGHvT/2IA4GJVaEDL8DnoaS4+jxFtqCtU1Q60NRrgyNAwomZuTrwSh0+255MLU13YyfnU+FgCa48fzNIfcc5Z5xrYbkY=
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxx
In-reply-to:	<1196353496.13722.20.camel@xxxxxxxxxxxxxxxxxxxx>
List-help:	<mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id:	Xen developer discussion <xen-devel.lists.xensource.com>
List-post:	<mailto:xen-devel@lists.xensource.com>
List-subscribe:	<http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe:	<http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References:	<ab08258e0711280249x64d31ee8x7a51f392acae8477@xxxxxxxxxxxxxx> <add59a3f0711280610w3c5182cay87dacd2e675f3121@xxxxxxxxxxxxxx> <ab08258e0711281212w2cde58d0la9e0201f95da19b4@xxxxxxxxxxxxxx> <6bc632150711282130i113857e7p7cfb183af9701099@xxxxxxxxxxxxxx> <1196315351.13722.14.camel@xxxxxxxxxxxxxxxxxxxx> <20071129092613.GA26576@xxxxxxxxxxxxxxxxxxxxx> <1196353496.13722.20.camel@xxxxxxxxxxxxxxxxxxxx>
Sender:	xen-devel-bounces@xxxxxxxxxxxxxxxxxxx

Thanks all for the explanation.

Haifeng

On Nov 29, 2007 9:24 AM, Daniel Stodden <stodden@xxxxxxxxxx> wrote:
>
> On Thu, 2007-11-29 at 09:26 +0000, Tim Deegan wrote:
> > Hi,
> >
> > At 06:49 +0100 on 29 Nov (1196318951), Daniel Stodden wrote:
> > > On Thu, 2007-11-29 at 11:00 +0530, pradeep singh rautela wrote:
> > > > On Nov 29, 2007 1:42 AM, Haifeng He <hehaifeng2nd@xxxxxxxxx> wrote:
> > > > > Thanks for answering my question. I am talking about PV mode. What 
> > > > > about shadow
> > > > > page table? Does it mean, Xen will keep (real) copies of page tables?
> > > >
> > > > Shadown page tables are employed in HVM guests not PV guests.
> >
> > Shadow pagetables are also used when doing live migration of PV guests,
> > but they don't do the automatic translation and reference-counting that
> > they do for HVM guests.
> >
> > > regarding shadowed PV domains, there's still
> > > XENFEAT_auto_translated_physmap. but it's rather exotic and therefore
> > > rarely used.
> >
> > And therefore, AFAIK, doesn't work.
>
> Which is why people depending on it are stuck with 3.0.2.
>
>
> regards,
> Daniel
>
> --
> Daniel Stodden
> LRR     -      Lehrstuhl für Rechnertechnik und Rechnerorganisation
> Institut für Informatik der TU München             D-85748 Garching
> http://www.lrr.in.tum.de/~stodden         mailto:stodden@xxxxxxxxxx
> PGP Fingerprint: F5A4 1575 4C56 E26A 0B33  3D80 457E 82AE B0D8 735B
>
>
>

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel