On Fri, 18 Sep 2009, Arnd Bergmann wrote:

> This patch adds a flag for mmap that will be used to request a huge
> page region that will look like anonymous memory to user space.  This
> is accomplished by using a file on the internal vfsmount.  MAP_HUGETLB
> is a modifier of MAP_ANONYMOUS and so must be specified with it.  The
> region will behave the same as a MAP_ANONYMOUS region using small pages.
> 
> The patch also adds the MAP_STACK flag, which was previously defined
> only on some architectures but not on others. Since MAP_STACK is meant
> to be a hint only, architectures can define it without assigning a
> specific meaning to it.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

I think this is a more sane way of handling the mman flags.

Acked-by: Eric B Munson <ebmunson@us.ibm.com>