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authorEric B Munson <ebmunson@us.ibm.com>2009-09-22 04:03:47 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-22 18:17:42 +0400
commit4e52780d41a741fb4861ae1df2413dd816ec11b1 (patch)
treeb3722349661ed0ce87841b110f568616892cf719 /Documentation/vm/hugetlbpage.txt
parent90f72aa58bbf076b68e289fbd71eb829bc505923 (diff)
downloadlinux-4e52780d41a741fb4861ae1df2413dd816ec11b1.tar.xz
hugetlb: 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 userspace. 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. [akpm@linux-foundation.org: fix arch definitions of MAP_HUGETLB] Signed-off-by: Eric B Munson <ebmunson@us.ibm.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Adam Litke <agl@us.ibm.com> Cc: David Gibson <david@gibson.dropbear.id.au> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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