linux-kernel - Re: [Patch v4 1/2] freezer: check OOM kill while being frozen

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Message-ID: <2588099.AI1YmNFQ25@vostro.rjw.lan>
Date:	Tue, 09 Sep 2014 00:48:28 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Tejun Heo <tj@...nel.org>
Cc:	Cong Wang <xiyou.wangcong@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	David Rientjes <rientjes@...gle.com>,
	Michal Hocko <mhocko@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [Patch v4 1/2] freezer: check OOM kill while being frozen

On Tuesday, September 09, 2014 07:22:53 AM Tejun Heo wrote:
> On Mon, Sep 08, 2014 at 11:53:34PM +0200, Rafael J. Wysocki wrote:
> > But please tell me this: If TIF_MEMDIE is set and we thaw the process,
> > can it do *anything* before dying or will it die immediately?
> 
> The task could be in freezer from anywhere and there's no limit in
> what the task may do before it eventually dies.

Well, not exactly from anywhere.  Just from where try_to_freeze() is called
I suppose?

Which means that if this is a user space task, it won't to a lot before dying,
will it?

Rafael

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