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Re: [Xen-devel] query on physical memory map for Xen?
| To: | pradeep singh rautela <rautelap@xxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] query on physical memory map for Xen? |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Fri, 11 Apr 2008 07:54:13 +0100 |
| Delivery-date: | Thu, 10 Apr 2008 23:54:54 -0700 |
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| Thread-topic: | [Xen-devel] query on physical memory map for Xen? |
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On 11/4/08 07:14, "pradeep singh rautela" <rautelap@xxxxxxxxx> wrote: > Based on my understanding of the Xen code, I have a small query for you all. > > Xen hypervisor can access only a max of 16GB of physical memory > directly on x86 architecture. > Is this correct inference? > > So does Xen hypervisor cannot touch memory about 16G directly? Does it > employ some kind of temporary mapping like linux kernel to access > memory above 16G then? 32-bit Xen does not use memory above 16GB at all. 64-bit Xen can use any amount of memory, and is able to keep a permanent mapping of all of it. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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