WARNING - OLD ARCHIVES

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/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[Xen-devel] Re: pv_ops & gntdev?

To: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Subject: [Xen-devel] Re: pv_ops & gntdev?
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Wed, 25 Feb 2009 13:35:38 -0800
Cc: Xen Development Mailing List <xen-devel@xxxxxxxxxxxxxxxxxxx>
Delivery-date: Wed, 25 Feb 2009 13:36:01 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <49A5B5DD.60309@xxxxxxxxxx>
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: <49A44030.2070709@xxxxxxxxxx> <49A4640E.1000807@xxxxxxxx> <49A470DD.2000008@xxxxxxxxxx> <49A517F6.30005@xxxxxxxxxx> <49A58506.2020407@xxxxxxxx> <49A58FFF.3050604@xxxxxxxxxx> <49A5A4BD.7080207@xxxxxxxx> <49A5B5DD.60309@xxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Thunderbird 2.0.0.19 (X11/20090105)
Gerd Hoffmann wrote:
Jeremy Fitzhardinge wrote:
Hm, I hope not.  Doesn't it always end up using set_pte*?

ptep_get_and_clear_full();

See zap_pte_range() in mm/memory.c

Ah, right. It could be changed to use ptep_modify_prot_start/commit. That would make it batchable too. Slightly less good for native.

   J


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

<Prev in Thread] Current Thread [Next in Thread>