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Re: [Xen-devel] mapping of memory below 16Mb
| To: | Jan Beulich <jbeulich@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] mapping of memory below 16Mb |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Fri, 25 Jan 2008 07:57:25 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Thu, 24 Jan 2008 23:57:40 -0800 |
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| Thread-topic: | [Xen-devel] mapping of memory below 16Mb |
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On 25/1/08 07:51, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: >> This has a side 'benefit' that the range 0-1GB cannot be mapped with a 1GB >> superpage mapping, and that simplifies your patch a bit (since we will never >> need to free the statically-allocated first few l2e ident mapping pages). > > Actually - no, it would guarantee only the first of them would never be > freed. The others, as long as head.S puts them into l3_identmap > unconditionally, will still be subject to eventual freeing. Ah yes, because they map a 4GB range. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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