Re: [Xen-devel] [PATCH v6] xen/arm: Allow balooning working with 1:1 memory mapping

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2014-01-06 at 11:44 +0000, Julien Grall wrote:
> 
> On 12/19/2013 01:51 PM, Ian Campbell wrote:
> > On Tue, 2013-12-17 at 14:55 +0000, Stefano Stabellini wrote:
> >> On Tue, 17 Dec 2013, Julien Grall wrote:
> >>> With the lack of iommu, dom0 must have a 1:1 memory mapping for all
> >>> these guest physical address. When the ballon decides to give back a
> >>> page to the kernel, this page must have the same address as previously.
> >>> Otherwise, we will loose the 1:1 mapping and will break DMA-capable
> >>> devices.
> >>>
> >>> Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
> >>> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
> >>> Cc: Keir Fraser <keir@xxxxxxx>
> >>
> >> Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> >
> > Keir, any objections to this patch?
> 
> Hi Ian,
> 
> Do we need to wait Keir Ack?

I think he's had ample opportunity to object (last call!) and since this
code is explicitly dead on everything apart from ARM I intend to commit
it next time I go through my queue.

>  Without this patch most of supported ARM 
> platform won't be able to create guest correctly. On the Arndale, the 
> network is unstable and on midway, the kernel get stucks.
> It would be nice to have this patch for the next Xen 4.4 RC.
> 
> Sincerely yours,
> 



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