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Re: [Xen-devel] Question on save/restore mfn canonicalization
| To: | Andres Lagar-Cavilla <andreslc@xxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Question on save/restore mfn canonicalization |
| From: | John Levon <levon@xxxxxxxxxxxxxxxxx> |
| Date: | Fri, 28 Sep 2007 18:54:29 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Fri, 28 Sep 2007 10:55:19 -0700 |
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On Fri, Sep 28, 2007 at 12:25:28PM -0400, Andres Lagar-Cavilla wrote: > While exploring the paravirt save/restore code path, I noted a > (seemingly) lack of consistency between where/who canonicalizes > something and who un-canonicalizes. For example, the guest kernel > canonicalizes the store and console mfn's in pre_suspend, but > xc_domain_restore uncanonicalizes them before scheduling back the > restored guest. > The question is if there is a mandatory reason for this, or is just the > way the code was written. Can I, e.g, fill the > pfn_to_mfn_frame_list(_list) entries from "outside" and remove that code > from post_suspend, or will something break? You'll break the ABI. I don't know of a reason why it's so inconsistent. regards john _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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