From: Nick Piggin Don't cause all threads in all other thread groups to gain TIF_MEMDIE otherwise we'll get a thundering herd eating our 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 Signed-off-by: Andrew Morton --- mm/oom_kill.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff -puN mm/oom_kill.c~oom-less-memdie mm/oom_kill.c --- a/mm/oom_kill.c~oom-less-memdie +++ a/mm/oom_kill.c @@ -323,11 +323,12 @@ 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; _