On Thu, 26 Sep 2013, Ming Liu wrote:
> diff --git a/mm/oom_kill.c b/mm/oom_kill.c
> index 314e9d2..7e50a95 100644
> --- a/mm/oom_kill.c
> +++ b/mm/oom_kill.c
> @@ -113,11 +113,22 @@ struct task_struct *find_lock_task_mm(struct task_struct *p)
> static bool oom_unkillable_task(struct task_struct *p,
> const struct mem_cgroup *memcg, const nodemask_t *nodemask)
> {
> + struct task_struct *init_tsk;
> +
> if (is_global_init(p))
> return true;
> if (p->flags & PF_KTHREAD)
> return true;
>
> + /* It won't help free memory if p is sharing mm with init */
> + rcu_read_lock();
> + init_tsk = find_task_by_pid_ns(1, &init_pid_ns);
> + if(p->mm == init_tsk->mm) {
> + rcu_read_unlock();
> + return true;
> + }
> + rcu_read_unlock();
> +
> /* When mem_cgroup_out_of_memory() and p is not member of the group */
> if (memcg && !task_in_mem_cgroup(p, memcg))
> return true;
You're aware of init_mm?
Can you post the kernel log when one of these "extreme cases" happens?
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