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    Subject[PATCH 3.13 002/140] mm/mempolicy.c: fix mempolicy printing in numa_maps
    Date
    3.13-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: David Rientjes <rientjes@google.com>

    commit 8790c71a18e5d2d93532ae250bcf5eddbba729cd upstream.

    As a result of commit 5606e3877ad8 ("mm: numa: Migrate on reference
    policy"), /proc/<pid>/numa_maps prints the mempolicy for any <pid> as
    "prefer:N" for the local node, N, of the process reading the file.

    This should only be printed when the mempolicy of <pid> is
    MPOL_PREFERRED for node N.

    If the process is actually only using the default mempolicy for local
    node allocation, make sure "default" is printed as expected.

    Signed-off-by: David Rientjes <rientjes@google.com>
    Reported-by: Robert Lippert <rlippert@google.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Acked-by: Mel Gorman <mgorman@suse.de>
    Cc: Ingo Molnar <mingo@kernel.org>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    mm/mempolicy.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/mm/mempolicy.c
    +++ b/mm/mempolicy.c
    @@ -2928,7 +2928,7 @@ void mpol_to_str(char *buffer, int maxle
    unsigned short mode = MPOL_DEFAULT;
    unsigned short flags = 0;

    - if (pol && pol != &default_policy) {
    + if (pol && pol != &default_policy && !(pol->flags & MPOL_F_MORON)) {
    mode = pol->mode;
    flags = pol->flags;
    }



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