Re: [Xen-devel] [PATCH v11 02/14] arch/arm: unmap partially-mapped memory regions

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 28/08/14 05:19, Arianna Avanzini wrote:
> On Wed, Aug 27, 2014 at 12:35:54PM -0400, Julien Grall wrote:
> > Hi Arianna,
> Hello!
Hi Arianna,

> Thank you for the correction and for pointing that corner case out. Since I
> have to send a new version perhaps I'll try to handle also the case you
> mentioned. Just to see if I understood things correctly: the correct behavior
> would be to leave the mapping already existing at the end of the range as it
> is?
The main point is too unmap only what you have mapped during the call of 
apply_p2m_changes.
Otherwise you may get spurious warning message on Xen console and/or 
remove mapping that you haven't mapped.
But, for the latter case the mapping would have been override if the 
call was succeeded.
Regards,

--
Julien Grall

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