Re: [Xen-devel] Re: changeset 13403 ...

[Keir Fraser <keir@xxxxxxxxxxxxx>]

On 29/1/07 13:48, "Keir Fraser" <keir@xxxxxxxxxxxxx> wrote:

> On 29/1/07 13:40, "Gerd Hoffmann" <kraxel@xxxxxxx> wrote:
> 
>> Just noticed that domU kexec doesn't work any more, changeset 13403 is
>> the culpit.  Hmm.  No, it isn't easy to work-around ...
>> 
>> cheers,
> 
> Two pagetable switches in a single multicall? First switch is to a pagetable
> which maps only the multicall structure. This small intermediate table has
> to be mapped read-only in the original pagetables and in the final
> pagetables, but it will only be a few pages of memory (4 in the worst case).

Oh, it'll need a hypercall transfer page too. And it's a mmuext_op list that
you need, not a multicall. The transfer page and mmuext_op list can be
placed in adjacent pages so that you don't need any more intermediate
pagetable pages.

 -- Keir


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel