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

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Message-Id: <200703011609.43804.rjw@sisk.pl>
Date:	Thu, 1 Mar 2007 16:09:42 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Andrew Morton <akpm@...l.org>
Cc:	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: [PATCH -mm 3/7] Freezer: Remove PF_NOFREEZE from rcutorture thread

From: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

Remove PF_NOFREEZE from the rcutorture thread, adding a try_to_freeze() call as
required.

Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
Acked-by: Pavel Machek <pavel@....cz>
---
 kernel/rcutorture.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-2.6.20-mm2/kernel/rcutorture.c
===================================================================
--- linux-2.6.20-mm2.orig/kernel/rcutorture.c	2007-02-25 12:07:15.000000000 +0100
+++ linux-2.6.20-mm2/kernel/rcutorture.c	2007-02-25 12:49:23.000000000 +0100
@@ -46,6 +46,7 @@
 #include <linux/byteorder/swabb.h>
 #include <linux/stat.h>
 #include <linux/srcu.h>
+#include <linux/freezer.h>
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Paul E. McKenney <paulmck@...ibm.com> and "
@@ -585,7 +586,6 @@ rcu_torture_writer(void *arg)
 
 	VERBOSE_PRINTK_STRING("rcu_torture_writer task started");
 	set_user_nice(current, 19);
-	current->flags |= PF_NOFREEZE;
 
 	do {
 		schedule_timeout_uninterruptible(1);
@@ -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())
-
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