linux-kernel - Re: [PATCH -v2 2/5] OOM: thaw the OOM victim if it is frozen

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Message-ID: <20141207135940.GB19034@htj.dyndns.org>
Date:	Sun, 7 Dec 2014 08:59:40 -0500
From:	Tejun Heo <tj@...nel.org>
To:	Michal Hocko <mhocko@...e.cz>
Cc:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	"\\\"Rafael J. Wysocki\\\"" <rjw@...ysocki.net>,
	David Rientjes <rientjes@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	LKML <linux-kernel@...r.kernel.org>, linux-pm@...r.kernel.org
Subject: Re: [PATCH -v2 2/5] OOM: thaw the OOM victim if it is frozen

On Sun, Dec 07, 2014 at 11:45:39AM +0100, Michal Hocko wrote:
....
>  void mark_tsk_oom_victim(struct task_struct *tsk)
>  {
>  	set_tsk_thread_flag(tsk, TIF_MEMDIE);
> +	__thaw_task(tsk);

Yeah, this is a lot better.  Maybe we can add a comment at least
pointing readers to where to look at to understand what's going on?
This stems from the fact that OOM killer which essentially is a memory
reclaim operation overrides freezing.  It'd be nice if that is
documented somehow.

Thanks.

-- 
tejun
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