linux-kernel - Re: [PATCH 4/7] cgroup_freezer: don't stall transition to FROZEN for PF_NOFREEZE or PF_FREEZER

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Message-ID: <20121024190651.GC12182@atj.dyndns.org>
Date:	Wed, 24 Oct 2012 15:06:51 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	rjw@...k.pl, linux-kernel@...r.kernel.org, lizefan@...wei.com,
	containers@...ts.linux-foundation.org, cgroups@...r.kernel.org
Subject: Re: [PATCH 4/7] cgroup_freezer: don't stall transition to FROZEN for
 PF_NOFREEZE or PF_FREEZER_SKIP tasks

Hello, Oleg.

On Tue, Oct 23, 2012 at 05:55:33PM +0200, Oleg Nesterov wrote:
> > Ooh, ouch, definitely.  We should clear that.  Can you please make a
> > patch?
> 
> Sure... but what do you think is better?
> 
> I'd prefer to simply clear PF_NOFREEZE (without set_freezable), but
> obviously this doesn't look exactly right from cgroup_freezer pov.

I don't think it matters all that much.  It's a pretty special case.
Maybe define PF_CLEAR_ON_EXEC_MASK or something and just include
PF_NOFREEZE in it?

Thanks.

--
tejun
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