Re: [Xen-devel] alloc_vm_area() calling vmalloc_sync_all()

To:	Jan Beulich <jbeulich@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject:	Re: [Xen-devel] alloc_vm_area() calling vmalloc_sync_all()
From:	Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date:	Mon, 19 Nov 2007 11:52:43 +0000
Delivery-date:	Mon, 19 Nov 2007 03:53:35 -0800
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxx
In-reply-to:	<474167E1.76E4.0078.0@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/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>
Sender:	xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index:	AcgqorFv7/hTbpaVEdyzdgAX8io7RQ==
Thread-topic:	[Xen-devel] alloc_vm_area() calling vmalloc_sync_all()
User-agent:	Microsoft-Entourage/11.3.6.070618

Yes, the virtual address returned gets passed to e.g.,
GNTTABOP_map_grant_ref, so the area must be mapped in the current address
space immediately. It can't be demand faulted.

 -- Keir


On 19/11/07 09:39, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

> Is there a specific reason for this? Other VM area functions don't do this
> pro-actively, and native only needs this for allowing NMI and MCE notifiers
> access to vmalloc space (which is being taken care of when registering
> such handlers).
> 
> Thanks, Jan
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel



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

WARNING - OLD ARCHIVES

xen-devel

Re: [Xen-devel] alloc_vm_area() calling vmalloc_sync_all()