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RE: [Xen-devel] Regarding page table management changes from Xen v1to Xe
| To: | "Anthony Liguori" <aliguori@xxxxxxxxxx>, "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx> |
|---|---|
| Subject: | RE: [Xen-devel] Regarding page table management changes from Xen v1to Xen v2 (and v3) |
| From: | "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx> |
| Date: | Wed, 26 Apr 2006 21:00:00 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx, Himanshu Raj <rhim@xxxxxxxxxxxxx> |
| Delivery-date: | Wed, 26 Apr 2006 13:00:17 -0700 |
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| Thread-index: | AcZpXhGgrZiiK1F8SZGqTzG7n64i2wADbzqQ |
| Thread-topic: | [Xen-devel] Regarding page table management changes from Xen v1to Xen v2 (and v3) |
> > On 64b we could use the 1:1 mapping of all physmem that Xen has. > > Obviously that is infeasible on 32b. In fact the interface > (passing a > > virtual address) pretty much means we have to use a linear > mapping in > > both cases. > > Couldn't we temporarily map the page table page? Not that we > would actually want to do that. Just trying to confirm my understand. Sure, but that's expensive on 32b as map_domain_mem has to do real work (it's cheap on 64b as we have a 1-to-1 map of machine memory). Ian _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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