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    Subject[patch] cpusets: do not allow TIF_MEMDIE tasks to allocate globally
    Reverts git commit c596d9f320aaf30d28c1d793ff3a976dee1db8f5.

    OOM-killed tasks, marked as TIF_MEMDIE, should not be able to access
    memory outside its cpuset because it could potentially cause other
    exclusive cpusets to OOM themselves.

    Cc: Andi Kleen <ak@suse.de>
    Cc: Christoph Lameter <clameter@engr.sgi.com>
    Cc: Paul Jackson <pj@sgi.com>
    Signed-off-by: David Rientjes <rientjes@google.com>
    ---
    kernel/cpuset.c | 6 ------
    1 files changed, 0 insertions(+), 6 deletions(-)

    diff --git a/kernel/cpuset.c b/kernel/cpuset.c
    --- a/kernel/cpuset.c
    +++ b/kernel/cpuset.c
    @@ -2431,12 +2431,6 @@ int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
    might_sleep_if(!(gfp_mask & __GFP_HARDWALL));
    if (node_isset(node, current->mems_allowed))
    return 1;
    - /*
    - * Allow tasks that have access to memory reserves because they have
    - * been OOM killed to get memory anywhere.
    - */
    - if (unlikely(test_thread_flag(TIF_MEMDIE)))
    - return 1;
    if (gfp_mask & __GFP_HARDWALL) /* If hardwall request, stop here */
    return 0;

    -
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