On Thu, 30 Aug 2007, Clemens Kolbitsch wrote:

quoted text
> is there no way to tell the kernel, that a certain mapping must not be 
> removed, no matter what (except of course an explicit call to sys_unmap, 
> of course)?

I don't seem to get what is the issue here. Your mapping is not removed, 
only the VMAs are merged together into one larger VMA if they have 
neighbouring address ranges and compatible protection bits. See 
vma_merge().

-- 
Jiri Kosina
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