linux-kernel - Re: [PATCH -mm 3/7] Freezer: Remove PF

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Message-Id: <200703012054.26940.rjw@sisk.pl>
Date:	Thu, 1 Mar 2007 20:54:25 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Anton Blanchard <anton@...ba.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	Andrew Morton <akpm@...l.org>, Pavel Machek <pavel@....cz>,
	LKML <linux-kernel@...r.kernel.org>,
	Oleg Nesterov <oleg@...sign.ru>,
	Aneesh Kumar <aneesh.kumar@...il.com>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	Gautham R Shenoy <ego@...ibm.com>
Subject: Re: [PATCH -mm 3/7] Freezer: Remove PF_NOFREEZE from rcutorture thread

On Thursday, 1 March 2007 20:38, Anton Blanchard wrote:
> 
> Hi,
> 
> > Remove PF_NOFREEZE from the rcutorture thread, adding a
> > try_to_freeze() call as required.
> 
> ...
> 
> > @@ -607,6 +607,7 @@ rcu_torture_writer(void *arg)
> >  		}
> >  		rcu_torture_current_version++;
> >  		oldbatch = cur_ops->completed();
> > +		try_to_freeze();
> >  	} while (!kthread_should_stop() && !fullstop);
> >  	VERBOSE_PRINTK_STRING("rcu_torture_writer task stopping");
> >  	while (!kthread_should_stop())
> 
> I wonder if it makes sense to embed try_to_freeze() into the kthread
> API somewhere. Short of that we should document the try_to_freeze()
> requirement in the kthread documentation... Unfortunately I cant find
> any kthread docs in Documentation/ :)

Well, the patch is from Paul, so I think he'll be able to comment. :-)

Greetings,
Rafael
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