On Mon, 30 Nov 2015 18:54:29 +0800 <chenjie6@xxxxxxxxxx> wrote:
> From: chenjie <chenjie6@xxxxxxxxxx>
>
> when oom happened we can see:
> Out of memory: Kill process 9134 (init) score 3 or sacrifice child
> Killed process 9134 (init) total-vm:1868kB, anon-rss:84kB, file-rss:572kB
> Kill process 1 (init) sharing same memory
> ...
> Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
>
> That's because:
> the busybox init will vfork a process,oom_kill_process found
> the init not the children,their mm is the same when vfork.
>
> ...
>
> --- a/mm/oom_kill.c
> +++ b/mm/oom_kill.c
> @@ -513,7 +513,7 @@ void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
> rcu_read_lock();
> for_each_process(p)
> if (p->mm == mm && !same_thread_group(p, victim) &&
> - !(p->flags & PF_KTHREAD)) {
> + !(p->flags & PF_KTHREAD) && !is_global_init(p)) {
> if (p->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
> continue;
What kernel version are you using?
I don't think this can happen in current code...
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