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Re: [Xen-devel] [PATCH] x86/PAE partially linear page table support
| To: | Jan Beulich <jbeulich@xxxxxxxxxx>, Keir Fraser <keir@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] x86/PAE partially linear page table support |
| From: | Keir Fraser <keir@xxxxxxxxxxxxx> |
| Date: | Thu, 15 Feb 2007 13:24:07 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Thu, 15 Feb 2007 05:23:36 -0800 |
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| Thread-topic: | [Xen-devel] [PATCH] x86/PAE partially linear page table support |
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On 15/2/07 13:08, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: > Hmm, it would seem to me that while it may not easily generalize, it at least > properly extends to the case the patch tries to address, by exchanging > PGT_base_page_table against PGT_l2_page_table. Really, in current code > this can never happen for PGT_base_page_table in PAE (or compat mode > guests), as such references aren't being established anywhere, and hence > the code should be dead for such guests. You can't zap an L2 when there could be L3s later in the list that still reference that L2. > But even for the general case - wouldn't it be possible to call > relinquish_memory() CONFIG_PAGING_LEVELS-1 times, each time lowering > the level of page tables that can be forced invalid by one? Yeah, this would work. Seems acceptable. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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