Re: [PATCH] Don't allow the stack to grow into hugetlb reserved regions

[Ken Chen]

On 1/26/07, Hugh Dickins <hugh@xxxxxxxxxxx> wrote:
> Less trivial (and I wonder whether you've come to this from an ia64
> or a powerpc direction): I notice that ia64 has more stringent REGION
> checks in its ia64_do_page_fault, before calling expand_stack or
> expand_upwards.  So on that path, the usual path, I think your
> new check in acct_stack_growth is unnecessary on ia64;

I think you are correct. This appears to affect powerpc only. On ia64,
hugetlb lives in a completely different region and they can never step
into normal stack address space. And for x86, there isn't a thing called
"reserved address space" for hugetlb mapping.

       - Ken
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