This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


RE: [Xen-devel] map memory holes with same page

To: James Harper <james.harper@xxxxxxxxxxxxxxxx>, Keir Fraser <keir.xen@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] map memory holes with same page
From: Paul Durrant <Paul.Durrant@xxxxxxxxxx>
Date: Mon, 23 May 2011 09:42:51 +0100
Accept-language: en-US
Acceptlanguage: en-US
Cc: Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>
Delivery-date: Mon, 23 May 2011 01:43:20 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <AEC6C66638C05B468B556EA548C1A77D01D5728D@trantor>
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/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <AEC6C66638C05B468B556EA548C1A77D01D5728C@trantor> <C9FD4F2B.1ABE7%keir.xen@xxxxxxxxx> <AEC6C66638C05B468B556EA548C1A77D01D5728D@trantor>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: AcwXmzJOirfccwvzSIin7lOoxddnSAABLl7tAAAJQ/AAYUVP4A==
Thread-topic: [Xen-devel] map memory holes with same page
> -----Original Message-----
> Should there be a performance impact if Windows tries to touch a
> page that I have previously given pack with decrease_reservation?
> Will that invoke the PoD sweep?

No. The p2m entry will be 'invalid', not 'PoD'. IIRC the sweep should only be 
invoked if the cache is exhausted when trying to fix up a PoD entry.


Xen-devel mailing list