linux-kernel - Re: [PATCH -v2 5/5] OOM, PM: make OOM detection in the freezer path raceless

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Date:	Wed, 7 Jan 2015 13:41:24 -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 5/5] OOM, PM: make OOM detection in the freezer path
 raceless

Hello, Michal.  Sorry about the long delay.

On Fri, Dec 05, 2014 at 05:41:47PM +0100, Michal Hocko wrote:
...
> @@ -252,6 +220,8 @@ void thaw_kernel_threads(void)
>  {
>  	struct task_struct *g, *p;
>  
> +	oom_killer_enable();
> +

Wouldn't it be more symmetrical and make more sense to enable oom
killer after kernel threads are thawed?  Until kernel threads are
thawed, it isn't guaranteed that oom killer would be able to make
forward progress, right?

Other than that, looks good to me.

Thanks!

-- 
tejun
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