• Paul Jackson's avatar
    [PATCH] cpusets: confine oom_killer to mem_exclusive cpuset · ef08e3b4
    Paul Jackson authored
    
    
    Now the real motivation for this cpuset mem_exclusive patch series seems
    trivial.
    
    This patch keeps a task in or under one mem_exclusive cpuset from provoking an
    oom kill of a task under a non-overlapping mem_exclusive cpuset.  Since only
    interrupt and GFP_ATOMIC allocations are allowed to escape mem_exclusive
    containment, there is little to gain from oom killing a task under a
    non-overlapping mem_exclusive cpuset, as almost all kernel and user memory
    allocation must come from disjoint memory nodes.
    
    This patch enables configuring a system so that a runaway job under one
    mem_exclusive cpuset cannot cause the killing of a job in another such cpuset
    that might be using very high compute and memory resources for a prolonged
    time.
    Signed-off-by: default avatarPaul Jackson <pj@sgi.com>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    ef08e3b4