| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
Re: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table
|
To: |
"Li, Xin B" <xin.b.li@xxxxxxxxx>, "Han, Weidong" <weidong.han@xxxxxxxxx>, Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|
Subject: |
Re: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table |
|
From: |
Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
|
Date: |
Tue, 22 Apr 2008 18:44:53 +0100 |
|
Cc: |
"Xu, Anthony" <anthony.xu@xxxxxxxxx>, "Kay, Allen M" <allen.m.kay@xxxxxxxxx> |
|
Delivery-date: |
Tue, 22 Apr 2008 10:45:07 -0700 |
|
Envelope-to: |
www-data@xxxxxxxxxxxxxxxxxx |
|
In-reply-to: |
<B30DA1341B0CFA4893EF8A36B40B5C5D02930D73@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> |
|
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 |
|
Thread-index: |
AcikU/U3pfCdxRGgQWKd/PxtMk6F9AABbOHmAAAZSpAAAJq3BAADN6LwAAGQyzAAAMGNwAAAJK0NAAbwDTAABGeXIw== |
|
Thread-topic: |
[Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table |
|
User-agent: |
Microsoft-Entourage/11.4.0.080122 |
On 22/4/08 16:43, "Li, Xin B" <xin.b.li@xxxxxxxxx> wrote:
>> Then don't allow EPT 2MB mappings for domains which have
>> passthru devices?
>>
>
> EPT 2M page is already supported while VT-d 2M not, so for we have to
> seperate the 2 guys if we want to use 2M page in EPT.
> and of course we share the page tables if both sides use 4K pages.
Just share the tables and put up with not having 2MB mappings available to
you if a guest has devices passed through to it? Doesn't sound so bad to me,
and you can get the performance back down the line by fixing the VT-d
hardware to understand superpage mappings. We're going to end up with a
silly number of p2m structures otherwise.
-- Keir
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
| <Prev in Thread] |
Current Thread |
[Next in Thread>
|
- RE: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table, (continued)
- RE: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table, Han, Weidong
- Re: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table, Keir Fraser
- RE: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table, Han, Weidong
- RE: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table, Ian Pratt
- RE: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table, Han, Weidong
- Re: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table, Keir Fraser
- RE: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table, Han, Weidong
- RE: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table, Espen Skoglund
- RE: [Xen-devel] [PATCH] [VTD] Separate VT-d page table fromP2M table, Han, Weidong
- RE: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table, Li, Xin B
- Re: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table,
Keir Fraser <=
- Re: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table, Samuel Thibault
RE: [Xen-devel] [PATCH] [VTD] Separate VT-d page table from P2M table, Han, Weidong
|
|
|
| |
|
Home