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    Subject[patch 3/5] oom: less memdie
    Don't cause all threads in all other thread groups to gain TIF_MEMDIE
    otherwise we'll get a thundering herd eating out memory reserve. This
    may not be the optimal scheme, but it fits our policy of allowing just
    one TIF_MEMDIE in the system at once.

    Signed-off-by: Nick Piggin <>

    Index: linux-2.6/mm/oom_kill.c
    --- linux-2.6.orig/mm/oom_kill.c
    +++ linux-2.6/mm/oom_kill.c
    @@ -322,11 +322,12 @@ static int oom_kill_task(struct task_str

    * kill all processes that share the ->mm (i.e. all threads),
    - * but are in a different thread group.
    + * but are in a different thread group. Don't let them have access
    + * to memory reserves though, otherwise we might deplete all memory.
    do_each_thread(g, q) {
    if (q->mm == mm && q->tgid != p->tgid)
    - __oom_kill_task(q, 1);
    + force_sig(SIGKILL, p);
    } while_each_thread(g, q);

    return 0;
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      Last update: 2006-10-12 16:13    [W:0.024 / U:309.572 seconds]
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