| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
[Xen-devel] Re: [patch 06/26] Xen-paravirt_ops: paravirt_ops: allocate a
|
To: |
Ingo Molnar <mingo@xxxxxxx> |
|
Subject: |
[Xen-devel] Re: [patch 06/26] Xen-paravirt_ops: paravirt_ops: allocate a fixmap slot |
|
From: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
|
Date: |
Tue, 27 Feb 2007 10:55:17 -0800 |
|
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>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> |
|
Delivery-date: |
Tue, 27 Feb 2007 10:54:28 -0800 |
|
Envelope-to: |
www-data@xxxxxxxxxxxxxxxxxx |
|
In-reply-to: |
<20070227101143.GC10827@xxxxxxx> |
|
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> <20070227081631.122933982@xxxxxxxx> <20070227101143.GC10827@xxxxxxx> |
|
Sender: |
xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
|
User-agent: |
Thunderbird 1.5.0.9 (X11/20070212) |
Ingo Molnar wrote:
> * Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
>
>
>> Allocate a fixmap slot for use by a paravirt_ops implementation. Xen
>> uses this to map the hypervisor's shared info page, which doesn't have
>> a pseudo-physical page number, and therefore can't be mapped
>> ordinarily.
>>
>
> why not vmalloc it on the guest side? fixmaps are bad for this purpose
> for a general paravirt implementation, it limits the size of the shared
> info page, etc.
Yes. vmalloc would have the annoying side-effect of actually allocating
some pages which would be shadowed by the remapping, but I guess
get_vm_area would do the job. I'll give it a go.
J
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home
xen.org, 