| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
[Xen-devel] Re: [patch 14/26] Xen-paravirt_ops: add common patching mach
|
To: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
|
Subject: |
[Xen-devel] Re: [patch 14/26] Xen-paravirt_ops: add common patching machinery |
|
From: |
Ingo Molnar <mingo@xxxxxxx> |
|
Date: |
Fri, 16 Mar 2007 10:20:54 +0100 |
|
Cc: |
Zachary Amsden <zach@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxx, Rusty Russell <rusty@xxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Chris Wright <chrisw@xxxxxxxxxxxx>, Andi Kleen <ak@xxxxxx>, Anthony Liguori <anthony@xxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> |
|
Delivery-date: |
Fri, 16 Mar 2007 02:20:42 -0700 |
|
Envelope-to: |
www-data@xxxxxxxxxxxxxxxxxx |
|
In-reply-to: |
<20070301232528.055105942@xxxxxxxx> |
|
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: |
<20070301232443.195603797@xxxxxxxx> <20070301232528.055105942@xxxxxxxx> |
|
Sender: |
xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
|
User-agent: |
Mutt/1.4.2.2i |
* Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
> Implement the actual patching machinery. paravirt_patch_default()
> contains the logic to automatically patch a callsite based on a few
> simple rules:
>
> - if the paravirt_op function is paravirt_nop, then patch nops
> - if the paravirt_op function is a jmp target, then jmp to it
> - if the paravirt_op function is callable and doesn't clobber too much
> for the callsite, call it directly
>
> paravirt_patch_default is suitable as a default implementation of
> paravirt_ops.patch, will remove most of the expensive indirect calls
> in favour of either a direct call or a pile of nops.
Acked-by: Ingo Molnar <mingo@xxxxxxx>
Ingo
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home