linux-kernel - Re: [PATCH v2 03/10] freezer: add new freezable helpers using freezer_do_not

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Message-ID: <20130503165448.GA22709@mtj.dyndns.org>
Date:	Fri, 3 May 2013 09:54:48 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Colin Cross <ccross@...roid.com>,
	Linux PM list <linux-pm@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Arve Hjønnevåg <arve@...roid.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	Jeff Layton <jlayton@...hat.com>,
	Mandeep Baines <msb@...omium.org>
Subject: Re: [PATCH v2 03/10] freezer: add new freezable helpers using
 freezer_do_not_count()

On Fri, May 03, 2013 at 10:18:17AM -0400, Alan Stern wrote:
> Don't forget about freezable kernel threads.  They never cross the 
> kernel/user boundary.

Doesn't really matter for this purpose.  They first of all can't be
moved into !root cgroups and thus can't be cgroup-frozen and even if
they could they can't be killed or ptraced, so they just don't play
the same game.

Thanks.

-- 
tejun
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