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    Subject[patch] oom: do not dump task state for non thread group leaders
    When /proc/sys/vm/oom_dump_tasks is enabled, it's only necessary to dump
    task state information for thread group leaders. The kernel log gets
    quickly overwhelmed on machines with a massive number of threads by
    dumping non-thread group leaders.

    Cc: Christoph Lameter <cl@linux-foundation.org>
    Signed-off-by: David Rientjes <rientjes@google.com>
    ---
    mm/oom_kill.c | 2 ++
    1 files changed, 2 insertions(+), 0 deletions(-)

    diff --git a/mm/oom_kill.c b/mm/oom_kill.c
    --- a/mm/oom_kill.c
    +++ b/mm/oom_kill.c
    @@ -297,6 +297,8 @@ static void dump_tasks(const struct mem_cgroup *mem)
    continue;
    if (mem && !task_in_mem_cgroup(p, mem))
    continue;
    + if (!thread_group_leader(p))
    + continue;

    task_lock(p);
    printk(KERN_INFO "[%5d] %5d %5d %8lu %8lu %3d %3d %s\n",

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