 Home |
Products |
Support |
Community |
News |
xen-devel
RE: [Xen-devel] Design question for PV superpage support
| To: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, Dave McCracken <dcm@xxxxxxxx>, Mick.Jordan@xxxxxxx, Xen Developers List <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | RE: [Xen-devel] Design question for PV superpage support |
| From: | Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> |
| Date: | Mon, 2 Mar 2009 18:03:26 +0000 (GMT) |
| Cc: | |
| Delivery-date: | Mon, 02 Mar 2009 10:04:00 -0800 |
| Envelope-to: | www-data@xxxxxxxxxxxxxxxxxxx |
| In-reply-to: | <C5D1CD6A.3E1C%keir.fraser@xxxxxxxxxxxxx> |
| 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/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe> |
| List-unsubscribe: | <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe> |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
> From: Keir Fraser [mailto:keir.fraser@xxxxxxxxxxxxx] > > It'd be nice to fall back to the case of not being able to > guarantee all 2MB > extents are aligned and contiguous. So for example being able > to migrate to > or restore on a system that currently doesn't have enough > contiguous memory. Well, yes and no. I believe the ONLY reason to use 2MB pages is to achieve a significant performance advantage. And I suspect emulating 2MB "virtual pages" on 4KB physical pages will perform at least slightly worse than just 4KB-on-4KB, true? _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
| Previous by Date: | Re: [Xen-devel] Design question for PV superpage support, Mick Jordan |
|---|---|
| Next by Date: | Re: [Xen-devel] Design question for PV superpage support, Mick Jordan |
| Previous by Thread: | Re: [Xen-devel] Design question for PV superpage support, Keir Fraser |
| Next by Thread: | Re: [Xen-devel] Design question for PV superpage support, Keir Fraser |
| Indexes: | [Date] [Thread] [Top] [All Lists] |
