Re: [Xen-devel] Double mapping of iomem assertion

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 17/10/07 16:58, "Kieran Mansley" <kmansley@xxxxxxxxxxxxxx> wrote:

> The second ioremap calls get_vm_area() and happens to be given a region
> of virtual memory that at least partly overlaps the area that was used
> for the first one.  As the area was freed by the iounmap() in the middle
> this seems sensible, but then when it comes to get the PTE for the
> virtual addresses in the second map, it finds there are entries left
> over from the first one.

Well, that's bogus. iounmap() should zap all PTEs via remove_vm_area(). If
it's not doing so then we have a bug.

 -- Keir




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