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Date:	Fri, 20 Apr 2007 20:31:18 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	ego@...ibm.com, "Rafael J. Wysocki" <rjw@...k.pl>,
	Oleg Nesterov <oleg@...sign.ru>, linux-kernel@...r.kernel.org,
	vatsa@...ibm.com, paulmck@...ibm.com, pavel@....cz
Subject: Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop race


* Andrew Morton <akpm@...ux-foundation.org> wrote:

> > > I mean, we already have four of them (PF_NOFREEZE, PF_FROZEN, 
> > > PF_FREEZER_SKIP, TIF_FREEZE), and you will need to introduce two 
> > > more for the freezer-based CPU hotplug, so if yet another one is 
> > > needed, that will make up almost a separate u8 field ...
> > 
> > I am perfectly ok with it. But I am not sure if everybody would 
> > agree to have another field in the task struct, though in this case 
> > it does make sense :-)
> 
> OK by me.  You might want to consider making that fields's locking 
> protocol be set_bit(), clear_bit(), etc rather than task_lock().

is OK to me too, the extra field isnt a problem.

	Ingo
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