Re: [Xen-devel] [RESEND] Question about recursive mappings

["Bruce Rogers" <BROGERS@xxxxxxxxxx>]

Is it still the case that we don't support recursive mappings for PAE
page tables?  NetWare relies on recursive mappings in both PAE and
non-PAE modes.  The non-PAE mode is working well, but now that I've
statred working on running with PAE it appears I'm hitting this issue.

- Bruce


>>> On 5/23/2006 at 3:52 AM, in message
<9e623acb8c30c70453a9b82b8b9a63b7@xxxxxxxxxxxx>, Keir Fraser
<Keir.Fraser@xxxxxxxxxxxx> wrote:

> On 23 May 2006, at 10:41, Ian Pratt wrote:
> 
>> Can you explain the pagtable structure a little better please. Does
the
>> L3 contain an entry point at itself (recursive), or at another L3
>> (foreign)?
>>
>> I've never come across non-root pagetable linear mappings other than
in
>> the crock that is PAE (3 level) where you have to use 4 entries in
an 
>> L2
>> to point to all the L2s due to the limited address space.
> 
> And that's something we don't currently support. A slightly more 
> generic linear pagetable logic that would permit us to support linear

> pagetables on PAE would be a good thing.
> 
>   -- Keir
> 
> 
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