linux-kernel - Re: [PATCH] oom: skip frozen tasks

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Message-ID: <4E576F65.5060009@openvz.org>
Date:	Fri, 26 Aug 2011 14:03:17 +0400
From:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
To:	Michal Hocko <mhocko@...e.cz>
CC:	David Rientjes <rientjes@...gle.com>,
	Oleg Nesterov <oleg@...hat.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [PATCH] oom: skip frozen tasks

Michal Hocko wrote:

> @@ -450,6 +459,10 @@ static int oom_kill_task(struct task_struct *p, struct mem_cgroup *mem)
>   			pr_err("Kill process %d (%s) sharing same memory\n",
>   				task_pid_nr(q), q->comm);
>   			task_unlock(q);
> +
> +			if (frozen(q))
> +				thaw_process(q);
> +

We must thaw task strictly after sending SIGKILL.
But anyway I think this is a bad idea.

>   			force_sig(SIGKILL, q);
>   		}
>

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