On Tue, 25 Aug 2009 12:14:53 +0100 Eric B Munson <ebmunson@xxxxxxxxxx> 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. > > Signed-off-by: Eric B Munson <ebmunson@xxxxxxxxxx> > --- > include/asm-generic/mman-common.h | 1 + > include/linux/hugetlb.h | 7 +++++++ > mm/mmap.c | 19 +++++++++++++++++++ alpha fix: From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> mm/mmap.c: In function 'do_mmap_pgoff': mm/mmap.c:953: error: 'MAP_HUGETLB' undeclared (first use in this function) mm/mmap.c:953: error: (Each undeclared identifier is reported only once mm/mmap.c:953: error: for each function it appears in.) Cc: Adam Litke <agl@xxxxxxxxxx> Cc: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx> Cc: David Rientjes <rientjes@xxxxxxxxxx> Cc: Eric B Munson <ebmunson@xxxxxxxxxx> Cc: Hugh Dickins <hugh.dickins@xxxxxxxxxxxxx> Cc: Lee Schermerhorn <lee.schermerhorn@xxxxxx> Cc: Mel Gorman <mel@xxxxxxxxx> Cc: Nick Piggin <nickpiggin@xxxxxxxxxxxx> Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx> Cc: Richard Henderson <rth@xxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/alpha/include/asm/mman.h | 1 + 1 file changed, 1 insertion(+) diff -puN arch/alpha/include/asm/mman.h~hugetlb-add-map_hugetlb-for-mmaping-pseudo-anonymous-huge-page-regions-alpha-fix arch/alpha/include/asm/mman.h --- a/arch/alpha/include/asm/mman.h~hugetlb-add-map_hugetlb-for-mmaping-pseudo-anonymous-huge-page-regions-alpha-fix +++ a/arch/alpha/include/asm/mman.h @@ -28,6 +28,7 @@ #define MAP_NORESERVE 0x10000 /* don't check for reservations */ #define MAP_POPULATE 0x20000 /* populate (prefault) pagetables */ #define MAP_NONBLOCK 0x40000 /* do not block on IO */ +#define MAP_HUGETLB 0x80000 /* create a huge page mapping */ #define MS_ASYNC 1 /* sync memory asynchronously */ #define MS_SYNC 2 /* synchronous memory sync */ _ -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
