linux-kernel - Re: [PATCH] mm/oom_kill.c: don't kill TASK

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Date:	Sat, 19 Sep 2015 10:25:06 +0200
From:	Michal Hocko <mhocko@...nel.org>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Oleg Nesterov <oleg@...hat.com>, Kyle Walker <kwalker@...hat.com>,
	akpm@...ux-foundation.org, rientjes@...gle.com, hannes@...xchg.org,
	vdavydov@...allels.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	Stanislav Kozina <skozina@...hat.com>
Subject: Re: [PATCH] mm/oom_kill.c: don't kill TASK_UNINTERRUPTIBLE tasks

On Fri 18-09-15 10:41:09, Christoph Lameter wrote:
[...]
>  	if (test_tsk_thread_flag(task, TIF_MEMDIE)) {
> -		if (oc->order != -1)
> -			return OOM_SCAN_ABORT;
> +		if (unlikely(frozen(task)))
> +			__thaw_task(task);

TIF_MEMDIE processes will get thawed automatically and then cannot be
frozen again. Have a look at mark_oom_victim.

>  	}
>  	if (!task->mm)
>  		return OOM_SCAN_CONTINUE;

-- 
Michal Hocko
SUSE Labs
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