On Fri, Feb 18, 2000 at 11:05:31AM -0800, Matthew Dillon wrote:
> I also think that a single guard page at the base of the
> stack may be insufficient for some applications. I'm
> considering adding yet another field to vm_map_entry
> 'vm_pindex_t guard_pages' which allows the number of
> guard pages to be specified (we can use mmap()'s offset
> argument to pass the parameter).
In general, a given number of guard pages is insufficient for some (perhaps
non-existent) applications. The basic idea is to catch typical stack
overflow. Trying to always catch stack overflow is not practical. Since
this is a heuristic error detection technique, I'm not sure how much
work/complexity it's worth to paramaterize the number of guard pages for
each mapping.
Jason
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