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    Subject[PATCH] get_nodes mask miscalculation
    It appears there is a nodemask miscalculation in the get_nodes()
    function in mm/mempolicy.c. This bug has two effects:

    1. It is impossible to specify a length 1 nodemask.
    2. It is impossible to specify a nodemask containing the last node.

    The following patch against 2.6.8-rc3 has been confirmed to solve
    both problems.

    Signed-off-by: Brent Casavant <>

    --- linux-2.6.8-rc3/mm/mempolicy.c 2004-08-03 16:28:51.000000000 -0500
    +++ linux-work/mm/mempolicy.c 2004-08-09 14:56:44.000000000 -0500
    @@ -132,7 +132,6 @@
    unsigned long nlongs;
    unsigned long endmask;

    - --maxnode;
    bitmap_zero(nodes, MAX_NUMNODES);
    if (maxnode == 0 || !nmask)
    return 0;
    Brent Casavant Forget bright-eyed and
    Operating System Engineer bushy-tailed; I'm red-
    Silicon Graphics, Inc. 44.8562N 93.1355W 860F eyed and bushy-haired.
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