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] [patch 18/26] Xen-paravirt_ops: Add XEN config options

To: Andi Kleen <ak@xxxxxx>
Subject: [Xen-devel] [patch 18/26] Xen-paravirt_ops: Add XEN config options
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Tue, 27 Feb 2007 00:13:55 -0800
Cc: Zachary Amsden <zach@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Ian Pratt <ian.pratt@xxxxxxxxxxxxx>, Rusty Russell <rusty@xxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Chris Wright <chrisw@xxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>
Delivery-date: Tue, 27 Feb 2007 00:43:39 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
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: <20070227081337.434798469@xxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: quilt/0.46-1
The XEN config option enables the Xen paravirt_ops interface, which is
installed when the kernel finds itself running under Xen.

Xen is no longer a sub-architecture, so the X86_XEN subarch config
option has gone.

Xen is currently incompatible with:
- PREEMPT
- HZ: set to 100Hz for now, to cut down on VCPU context switch rate.
  This will be adapted to use tickless later.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>
Signed-off-by: Ian Pratt <ian.pratt@xxxxxxxxxxxxx>
Signed-off-by: Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>

---
 arch/i386/Kconfig     |    2 ++
 arch/i386/xen/Kconfig |   10 ++++++++++
 2 files changed, 12 insertions(+)

===================================================================
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -216,6 +216,8 @@ config PARAVIRT
          under a hypervisor, improving performance significantly.
          However, when run without a hypervisor the kernel is
          theoretically slower.  If in doubt, say N.
+
+source "arch/i386/xen/Kconfig"
 
 config VMI
        bool "VMI Paravirt-ops support"
===================================================================
--- /dev/null
+++ b/arch/i386/xen/Kconfig
@@ -0,0 +1,10 @@
+#
+# This Kconfig describes xen options
+#
+
+config XEN
+       bool "Enable support for Xen hypervisor"
+       depends on PARAVIRT && HZ_100 && !PREEMPT && !NO_HZ
+       default y
+       help
+         This is the Linux Xen port.

-- 


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

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