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Re: [Xen-devel] frame_table initialisation
| To: | PUCCETTI Armand <armand.puccetti@xxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] frame_table initialisation |
| From: | Keir Fraser <keir@xxxxxxxxxxxxx> |
| Date: | Mon, 26 Feb 2007 16:02:12 +0000 |
| Delivery-date: | Mon, 26 Feb 2007 08:01:41 -0800 |
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| In-reply-to: | <45E2F29A.2020601@xxxxxx> |
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| Thread-index: | AcdZv3nGuJnKksWyEdu1UwAX8io7RQ== |
| Thread-topic: | [Xen-devel] frame_table initialisation |
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On 26/2/07 14:45, "PUCCETTI Armand" <armand.puccetti@xxxxxx> wrote: > 2. some lines before in __start_xen, this variable is referenced by > function map_pages_to_xen -> virt_to_xen_l2 -> alloc_xen_pagetable -> > mfn_to_page. > What should the value of frame_table be there? > > Do I miss some pre-initialisation(s)? The fact that frame_table is not initialised here (and hence will be NULL) doesn't actually matter, since the result of mfn_to_page() is only actually used as a value to page_to_mfn(). And page_to_mfn(mfn_to_page(m))==m for any (constant) value of frame_table. This code could be clearer I'll admit. It probably makes sense for alloc_xen_pagetable to return an MFN rather than a page_info pointer. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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