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: [RFC, PATCH 7/24] i386 Vmi memory hole

To: Zachary Amsden <zach@xxxxxxxxxx>
Subject: [Xen-devel] Re: [RFC, PATCH 7/24] i386 Vmi memory hole
From: Gerd Hoffmann <kraxel@xxxxxxx>
Date: Wed, 15 Mar 2006 10:27:15 +0100
Cc: Andrew Morton <akpm@xxxxxxxx>, Joshua LeVasseur <jtl@xxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Pratap Subrahmanyam <pratap@xxxxxxxxxx>, Wim Coekaerts <wim.coekaerts@xxxxxxxxxx>, Jack Lo <jlo@xxxxxxxxxx>, Dan Hecht <dhecht@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxxxx>, Christopher Li <chrisl@xxxxxxxxxx>, Chris Wright <chrisw@xxxxxxxxxxxx>, Virtualization Mailing List <virtualization@xxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxx>, Anne Holler <anne@xxxxxxxxxx>, Jyothy Reddy <jreddy@xxxxxxxxxx>, Kip Macy <kmacy@xxxxxxxxxxx>, Ky Srinivasan <ksrinivasan@xxxxxxxxxx>, Leendert van Doorn <leendert@xxxxxxxxxxxxxx>, Dan Arai <arai@xxxxxxxxxx>
Delivery-date: Wed, 15 Mar 2006 10:26:15 +0000
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <4417D212.20401@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>
References: <200603131804.k2DI4N6s005678@xxxxxxxxxxxxxxxxxxx> <20060314064107.GK12807@xxxxxxxxxxxxxxxxxx> <44166D6B.4090701@xxxxxxxxxx> <20060314215616.GM12807@xxxxxxxxxxxxxxxxxx> <4417454F.2080908@xxxxxxxxxx> <20060315043108.GP12807@xxxxxxxxxxxxxxxxxx> <4417CFDA.1060806@xxxxxxx> <4417D212.20401@xxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Thunderbird 1.5 (X11/20060111)
>        pushl $SYSENTER_RETURN
> 
> SYSENTER_RETURN is a link time constant that is defined based on the
> location of the vsyscall page.  If the vsyscall page can move, this can
> not be a constant.

The vsyscall page is at PAGE_OFFSET - 2*PAGE_SIZE.  It doesn't move.  At
least not at runtime.  At compile time it can change with the new
VMSPLIT config options, but that isn't a problem ;)

cheers,

  Gerd

-- 
Gerd 'just married' Hoffmann <kraxel@xxxxxxx>
I'm the hacker formerly known as Gerd Knorr.
http://www.suse.de/~kraxel/just-married.jpeg

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