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Re: [Xen-devel] vmx & efer
| To: | Jan Beulich <jbeulich@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] vmx & efer |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Mon, 07 May 2007 13:39:00 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Mon, 07 May 2007 05:35:47 -0700 |
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| Thread-topic: | [Xen-devel] vmx & efer |
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On 7/5/07 11:08, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: >> That I'm not sure about. We always ensure the shadow PAE CR3 is in low 4GB, >> so we don't have to worry about this. I guess it depends whether PAE CR3 is > > Because it happens to sit in the vcpu structure? That's one more thing to > remember when folding the Xen heap into the domain heap on x86-64 then. > (I have to admit that I dislike all these hidden address range dependencies.) I'm very inclined to turn 'Xen heap' allocations into 'allocate below 4GB' allocations by default. Then remove that restriction at allocation sites one-by-one. We do so little Xen-heap allocation (after all we live with ~12MB heap right now) that this will be absolutely fine. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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