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

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Message-ID: <20140912234846.GA28183@mtj.dyndns.org>
Date:	Sat, 13 Sep 2014 08:48:46 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Michal Hocko <mhocko@...e.cz>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Cong Wang <xiyou.wangcong@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [Patch v4 1/2] freezer: check OOM kill while being frozen

Hello, Michal.

On Wed, Sep 10, 2014 at 03:24:17PM +0200, Michal Hocko wrote:
> What do you think about this way to help distinguish kernel threads and
> user processes and keep the future maintenance of freezer saner?

I'm not sure either way.  Please note that we have quite a few
wrappers around try_to_freeze() - freezable_schedule*() and
wait_event_freezable*() - and several places where a userland can be
frozen.  Are we gonna introduce an alternate versions for all of them?
What do we actually gain?

Thanks.

-- 
tejun
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