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| author |   Arnd Bergmann <arnd@arndb.de> | 2009-09-21 17:03:45 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-22 07:17:41 -0700 |
| commit | 90f72aa58bbf076b68e289fbd71eb829bc505923 (patch) | |
| tree | 992e5f59086cc77581fa10b52fb4a46fb3baf3f0 /mm | |
| parent | hugetlbfs: allow the creation of files suitable for MAP_PRIVATE on the vfs internal mount (diff) | |
| download | linux-dev-90f72aa58bbf076b68e289fbd71eb829bc505923.tar.xz linux-dev-90f72aa58bbf076b68e289fbd71eb829bc505923.zip | |
mm: add MAP_HUGETLB for mmaping pseudo-anonymous huge page regions
Add 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>
Cc: Eric B Munson <ebmunson@us.ibm.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: David Rientjes <rientjes@google.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions