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/

Home

xen-devel

[Top] [All Lists]

[Xen-devel] [PATCH] x86_64 linux: don't use USER_PTRS_PER_PGD in mm_walk

from [Jan Beulich]

[Permanent Link][Original]

To:	<xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject:	[Xen-devel] [PATCH] x86_64 linux: don't use USER_PTRS_PER_PGD in mm_walk()
From:	"Jan Beulich" <JBeulich@xxxxxxxxxx>
Date:	Tue, 07 Feb 2006 17:05:53 +0100
Delivery-date:	Tue, 07 Feb 2006 16:16:22 +0000
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxxx
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

Since USER_PTRS_PER_PGD depends on TASK_SIZE and thus on the current thread, it 
must not be used in code that can be
called in the context switch path (otherwise the 32-bitness of the outgoing 
task is used here rather then the 32-bitness
of the incoming one, possibly resulting in large parts of the page tables not 
getting converted to read-only).

Jan

xenlinux-x86_64-mm_walk.patch
Description: Text document

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

[More with this subject...]

<Prev in Thread]	Current Thread	[Next in Thread>
[Xen-devel] [PATCH] x86_64 linux: don't use USER_PTRS_PER_PGD in mm_walk(), Jan Beulich <=

Previous by Date:	[Xen-devel] Unable to host backend on User Domains, Abhay G A
Next by Date:	[Xen-users] Error: Device 0 (vif) could not be connected. (Xen 3.0.1 regression), Philippe Berthault
Previous by Thread:	[Xen-devel] Unable to host backend on User Domains, Abhay G A
Next by Thread:	[Xen-users] Error: Device 0 (vif) could not be connected. (Xen 3.0.1 regression), Philippe Berthault
Indexes:	[Date] [Thread] [Top] [All Lists]

This site is hosted by Citrix