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

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Date:	Thu, 1 Mar 2007 13:38:26 -0600
From:	Anton Blanchard <anton@...ba.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
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>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.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


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/ :)

Anton
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