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

Re: [Xen-devel] Question about MMUEXT_PIN_L3_TABLE

To: "W. Michael Petullo" <mike@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Question about MMUEXT_PIN_L3_TABLE
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Thu, 8 Jul 2010 13:14:16 +0100
Cc:
Delivery-date: Thu, 08 Jul 2010 05:15:27 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20100708105739.GB2001@xxxxxxxxx>
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>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Acsei+zkWvzTbVz9SHmbXquwLedzlQACyidt
Thread-topic: [Xen-devel] Question about MMUEXT_PIN_L3_TABLE
User-agent: Microsoft-Entourage/12.24.0.100205
On 08/07/2010 11:57, "W. Michael Petullo" <mike@xxxxxxxx> wrote:

> (XEN) mm.c:1185:d13 PAE L3 slot is shared
> (XEN) mm.c:1393:d13 Failure in alloc_l3_table: entry 4
> (XEN) mm.c:2070:d13 Error while validating mfn 79f0a (pfn 4c2) for type
> 60000000: caf=80000003 taf=60000001
> (XEN) mm.c:2700:d13 Error while pinning mfn 79f0a
> 
> I have not yet had any luck finding the cause of this. From what I
> can tell, the kernel's page tables are valid. The kernel initializes
> memory and performs many other initializations successfully before this
> point. Does anyone have any suggestions?

The fourth L2 page directory (that is, the one pointed at by the fourth and
final L3 pgdir entry) must not be shared by multiple L3 page directories.
You need one such L2 pogdir for every L3 pgdir. Many OSes would normally
share these, and will need modifying to not do so.

 -- Keir




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

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